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ESIEN05-04
Part 3 – Troubleshooting 3–1
4
3
4
5
3
Part 3Troubleshooting
What is in this part? This part contains the following chapters:
Chapter See page
1–Troubleshooting 3–3
2–Error Codes 3–31
1–Error Codes: System Malfunctions 3–3
4–Additional Checks for Troubleshooting 3–53
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ESIEN05-04
3–2 Part 3 – Troubleshooting
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ESIEN05-04 Troubleshooting
Part 3 – Troubleshooting 3–3
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4
5
1Part 3
1 Troubleshooting
1.1 What Is in This Chapter?
Introduction When a problem occurs, you have to check all possible malfunctions. This chapter gives a general ideaof where to look for malfunctions.
Not all repair procedures are described. Some procedures are considered common practice.
Overview This chapter contains the following topics:
Topic See page
1.2–General Troubleshooting Flowchart 3–4
1.3–Overview of General Problems 3–5
1.4–Procedure of Self-Diagnosis by remote control 3–20
1.5–Fault-diagnosis by Wired remote control 3–21
1.6–Fault-diagnosis by infrared remote control 3–22
1.7–Overview of Error Codes 3–26
1.8–Troubleshooting by LED Indications on the Indoor Unit 3–27
1.9–Troubleshooting by remote control Display / LED Display 3–28
1.10–Overview of the Indoor Safety Devices 3–30
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Troubleshooting ESIEN05-04
3–4 Part 3 – Troubleshooting
1.2 General Troubleshooting Flowchart
Find out the situation according to the following procedure when there is a request for service from thecustomer.
YESNO NO NO
NO
NO Cooling
Heating
NO
NO
YES
YES
YESRuns
Runs
Nomal
Nomal
Doesn't run
YES
YES
YES
NOYES
(Service work required)
OK.We'll be right over.
(S1989)
Troubleshooting by remotecontroller malfunctioncode.
Turn the power supplyswitch ON or replacethe fuse.
Wait untilpower failureis over.
Is there apowerfailure?
Doesn't run at allThe power supply switch isOFF or the switch's fuse isburnt.
Set the remotecontroller's temperaturesetting to:(1)Whencooling:Minimum(2)Whenheating:Maximum
The fan comes onbut thecompressordoesn't run.
Cooling starts butstops right away.
Is the remotecontroller's operationlamp blinking?
Is the remote controller'soperation lamp blinking?Machines equipped withwireless remote controllers only.
Is the operation lamp of theindoor unit's signal receivingsection blinking?
Is the operation lamp of theindoor unit's signal receivingsection blinking?
Units equipped with wirelessremote controller only.
Troubleshooting by remotecontroller malfunctioncode.
Ask for the charactercode of the malfunctioncode.
Refer to "Remote controller displaymalfunction code and contents".
Units equipped with liquidcrystal remote controllers only
Units equipped with wirelessremote controllers only
Is the remotecontroller's operationlamp blinking?
Try turning theOperation switch OFFand On.
The unit won't runagain for a whileafter stopping.
The unit runs butdoesn't cool theroom.
Is the operation lamp ofthe indoor unit's signalreceiving sectionblinking?
Measure the suction /disharge temperature.
Units equipped with liquidcrystal remote controllers only
Units equipped with wirelessremote controllers only
Did you allow 3 minutes toelapse after turning ON?
Is there something causing theindoor load to be large, such asan open window or door?
(Temperature differential=suction temperature - discharge temperature)
Units equipped with liquidcrystal remote controllers only
Operation isnormal.
Temperaturedifferential is 8~18˚C
The units runs butdoesn't heat theroom.
Measure the suction /discharge temperature.
Is there something causing theindoor heat load to be large, suchas an open window or door?
(Temperature differential=discharge temperature - suction temperature)
Operation isnormal.
Temperaturedifferential is 14~30˚C
(1) The operation circuit fuse isdisconnected or is making poor contact.
(2) The operation swich is broken or itscontact is defective.
(3) The high pressure switch is broken.(4) The fan motor's magnetic switch is
broken.(5) The fan motor's overcurrent relay is
being actuated or is broken.(6) The compressor's overcurrent relay is
broken.(7) The compressor's protective thermostat
is broken.(8) The electrical system insulation is
defective.
(9) The compressor's magnetic switch'scontact is defective.(10) The compressor is broken.
(11) Thermostat is broken.(12) The cool/heat selector is broken.(13) The operation switch is broken.(14) The compressor's magnetic swich is
broken.
(15) Over-charged with refrigerant.(16) Air is mixed inside the refrigerant
circuit.(17) The pressure switch is broken.(18) The outdoor unit fan motor's magnetic
switch is broken.(19) The outdoor unit fan motor's auxiliary
relay is broken.
(20) The outdoor unit's heat exchanger isdirty.
(21) There is something blocking theoutdoor unit's air flow.
(22) Malfunction of the outdoor unit's fan.
(23) The indoor unit's air filter is dirty.(24) The indoor unit's heat exhanger is
dirty.(25) There is something blocking the indoor
unit's air flow.(26) Malfunction of the indoor unit's fan.
(27) Overcurrent relay (for compressor)(28) Compressor's protective themostat(29) The causes for the overcurrent relay
(for compressor) being actuated are:(29)-1 Power supply voltage is lower than
prescribed.(29)-2 High pressure is too high.(29)-3 The power supply cord is too small.(29)-4 The compressor is broken.(30) The causes for the compressor's
protective thermostat(30)-1 Internal leak of the-4way valve
(No substantial difference betweensuction and discharge temperature.
(30)-2 Unsatisfactory compression fromthe compressor
(30)-3 Different kind of refrigerant is charged.(30)-4 Malfunction of the expansion valve(30)-5 Unsatisfactory refrigerant circulation
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ESIEN05-04 Troubleshooting
Part 3 – Troubleshooting 3–5
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11.3 Overview of General Problems
Overview
Equipment Condition Remedy
1 Equipment does not operate. See page 3-62 Fan operates, but compressor does not. See page 3-83 Cooling/heating operation starts but stops
immediately.See page 3-10
4 Equipment operates but does not provideheating.
See page 3-12
7 Equipment discharges white mist. See page 3-148 Equipment produces loud noise or shakes. See page 3-159 Equipment discharges dust. See page 3-16
10 remote control LCD displays “88.” See page 3-1711 Indoor swing flap does not operate. See page 3-18
12 Equipment emits odor. Room smell and cigarette odors accumu-lated inside the indoor unit are dischargedwith air. Inside of the indoor unit must becleaned.
13 Flap operates when power is turned on. It is normal. The flap initializes for accuratepositioning.
14 Change of operation mode causes flap tomove.
It is normal. There is a control function thatmoves the flap when operation mode ischanged.
15 Fan operates in “M” mode during heatingeven if remote control is set to “Low.”
It is normal. It is caused by the activation ofthe overload control (airflow shift control).
16 Flap automatically moves during cooling. It is normal. It is caused by the activation ofthe dew prevention function or ceiling soil-ing prevention function.
17 Indoor unit fan operates in “L” mode for 1minute in microcomputer-controlled drymode even if compressor is not operating.
It is normal. The monitoring function forci-bly operates the fan for one minute.
18 In simultaneous ON/OFF multi-systemsetup, indoor unit (sub) does not operate insync with the other indoor unit (main).
(Flat, fan, etc.)
It is normal. It is caused by a signal trans-mission lag.
19 Indoor unit fan operates after heating oper-ation stops.
It is normal. The fan operates in the “LL”mode for 60 to 100 seconds to dissipatethe residual heat in the heater.
20 Drain pump operates when equipment isnot operating.
It is normal. The drain pump continues tooperate for several minutes after equip-ment is turned off.
21 Horizontal swing sends air to differentdirections in cooling and heating even if itis set to the same position.
It is normal. The airflow direction in cool-ing/dry operation is different from that inheating/fan operation.
22 Flap remains horizontal even if it is set toSwing.
It is normal. The flap does not swing in thethermostat OFF mode.
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Troubleshooting ESIEN05-04
3–6 Part 3 – Troubleshooting
1.3.1 Equipment does not operate
Applicable Model All models of SkyAir series
Error DetectionMethod
Error GeneratingCondition
Possible Causes Q Fuse blown or disorder of contact in operation circuit
Q Faulty operation switch or contact point
Q Faulty high pressure switch
Q Faulty magnetic switch for fan motorQ Activation or fault of overcurrent relay for fan motor
Q Faulty overcurrent relay for compressor
Q Faulty compressor protection thermostat
Q Insufficient insulation in electric system
Q Faulty contact point of magnetic switch for compressor
Q Malfunction of compressor
Q Defective remote control or low batteries (wireless)
Q Check if address is set correctly on wireless R.C.
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ESIEN05-04 Troubleshooting
Part 3 – Troubleshooting 3–7
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1Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may beoccurred.
Possibly faulty electriccomponent
Turn on power switch or replacefuse.If high-harmonics circuit breakeris not used on invertercompressor, have the circuitbreaker replaced.Wait until power returns.
Normal. Equipment startsoperation 3 minutes later (3-minstandby).
Diagnose based on error codeon remote controller.
Normal. Equipment startsoperation 3 minutes later (3-minstandby).
Diagnose based on error codeon remote controller.
Check electric system.
Is powerswitch OFF or fuse for
power switchblown?
Isoperation lamp on
LCD remote controllerflashing?
Isoperation switch pressed
repeatedly?
Wirelessremote controller
Is operation lamp on indoorunit signal receiving
section flashing?
Isthermostat changed and
reset again?
Is there power failure?
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
(S2575)
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ESIEN05-04 Troubleshooting
Part 3 – Troubleshooting 3–9
3
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1Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may beoccurred.
YES
YES
YES
NO
NO
YESNormal.(Thermostat OFF byoutdoor temperature)
Turn on the powerswitch or replace fuse.
NO
NO
YESReplace the magneticswitch or powertransistor.
Replace the PC board.
Replace thecompressor.
Check the thermistor.NO
Air sensor Indoor unitPC board
Outdoor unitPC board
Relay
Magneticswitch
COMP
Inputto PCboard
Inputto PCboard
OutputfromPCboard
eOutput from
relay ormicrocomputer
dOutput from
magneticswitch or SW
circuit ofpower
transistor
cOutput from
magneticswitch orU,V,W of
powertransistor
· Indoor unit fan runs at set airflow rate.· (In cooling operation)
When air thermistor ambient temperature is higher than set temperature· (In heating operation)
When air thermistor ambient temperature is lower than set temperature
Is the powerswitch OFF or the fuse for
power switchblown?
d
Is rated voltageoutput from the magnetic
switch or powertransistor?
e
Is rated voltage outputfrom the PC board?
Is the heatingswitch turned on at outdoor
temperature >30˚C
c
Is rated voltageapplied atthe compressor
terminals?
(S2576)
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Troubleshooting ESIEN05-04
3–10 Part 3 – Troubleshooting
1.3.3 Cooling/heating operation starts but stops immediately
Applicable Model All models of SkyAir series
Error DetectionMethod
Error GeneratingCondition
Possible Cause Q Excess charge of refrigerant
Q Air intrudes into refrigerant system
Q Faulty pressure switch
Q Faulty magnetic switch for outdoor unit fan motorQ Faulty aux. relay for outdoor unit fan motor
Q Soiled heat exchanger of outdoor unit
Q There is an interfering item in air flow of outdoor unit
Q Malfunction of outdoor unit fan
Q Soiled air filter of indoor unit
Q Soiled heat exchanger of indoor unit
Q There is some interfering item in airflow of indoor unit
Q Malfunction of indoor unit fan
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ESIEN05-04 Troubleshooting
Part 3 – Troubleshooting 3–11
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4
5
1Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may beoccurred.
Diagnose based on theerror code on remote
controller
Malfunction of fan motorCheck the magnetic switchand aux. switch for fanmotorCleaning
Remove the disturbingitem
Cleaning of the heatexchanger
After vacuum drying,charge correct amount ofrefrigerant
Check the pressure switch
Possible causes as follows:∗ Refrigerant overcharge∗ Mixing of air in refrigerant
system∗ Faulty pressure switch
Does the fan rotate?
Is the filter soiled?
NO
NO
Isthe operation
lamp of remote controllerflashing?
Is theoperation lamp
of indoor unit photo-sensingsection flashing?
Is the type ofremote controller wired or
wireless?
Is there any itemdisturbing airflow?
Is the heatexchanger soiled?
YES
NO
YES
YES
YES
YES
Wireless
YES
Heating: Indoor unitCooling: Outdoor unit
wired
[ ]
(S1992)
NO
NO
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Troubleshooting ESIEN05-04
3–12 Part 3 – Troubleshooting
1.3.6 Equipment operates but does not provide heating
Applicable Model All models of SkyAir series
Error DetectionMethod
Error GeneratingCondition
Possible Cause Q Excess charge of refrigerant
Q Air intrudes into refrigerant system
Q Faulty pressure switch
Q Faulty magnetic switch for outdoor unit fan motorQ Faulty aux. relay for outdoor unit fan motor
Q Soiled heat exchanger of outdoor unit
Q There is an interfering item in air flow of outdoor unit
Q Malfunction of outdoor unit fan
Q Soiled air filter of indoor unit
Q Soiled heat exchanger of indoor unit
Q There is some interfering item in airflow of indoor unit
Q Malfunction of indoor unit fan
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ESIEN05-04 Troubleshooting
Part 3 – Troubleshooting 3–13
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4
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1Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may beoccurred.
Measure the temperature ofsuction air and supply air.Temperature difference =Suction air temp. – Supply airtemp.
Wait for a while.No abnormality
No abnormality
Additional unit installationshould be considered
After vacuum drying, chargecorrect amount of refrigerant.
Check each item
Check each item
Check each item
Temperaturedifference for heatingshould be between 14
and 30˚C.
Is the unitin defrost mode?
Is the operationcurrent less than specified
level?
Does theheat load increase after
installation of theunit?
YES
YES
YES
YES
YES
YES
∗ Incorrect selection of model∗ Affection of sunlight∗Affection of excessive fresh
air into room
Gas shortage possiblygenerates trouble.
∗ Clogged air filter∗ Soiled heat exchanger∗ Malfunction of indoor fan
motor (Refer error code “A6”)
∗ Refrigerant overcharge∗ Soiled heat exchanger∗ Short circuit of discharge air∗ Disturbing item in air flow∗ Malfunction of fan motor of
outdoor unit(Refer error code “E7”, “H7”)
∗ Insufficient compression ofcompressor∗ Insufficient circulation of
refrigerant∗ Faulty expansion valve
NO
NO
NO
Does indoorunit air flowrate down?
NO
Is the levelof high pressure lower
than normal level?
NO
NO
(S1995)
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Troubleshooting ESIEN05-04
3–14 Part 3 – Troubleshooting
1.3.7 Equipment discharges white mist
Applicable Model All models of SkyAir series
Error DetectionMethod
Error GeneratingCondition
Possible Cause Q Humid installation site
Q Installation site is dirty and with dense oil mists.
Q Soiled heat exchanger
Q Clogged air filterQ Malfunction of fan motor
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may beoccurred.
Normal
Remove the source of humidcondition.
Cleaning of heat exchangeris necessary.
Remove the source of oilmist or dust.
Cleaning of air filter
Check fan motor(Refer error code “A6”)
Normal(Fog is generated due todefrosting operation)
Is white fog comingout from the unit?
Is the heatexchanger of indoor
unit soiled?
Is the sitedusty or with dense
oil mist?
NONO
NO
Is theairflow rate too small?
NO
NO
YES
YES
YES
YES
Is the roomtemperature higher than
set value in coolingoperation?
YES
Continue unit operation.
It may be necessary toremove the source of humidcondition.
Dust or oil mists should beremoved.
Possible causes as follows∗ Clogged air filter∗
Malfunction of fan motor
Did the trouble generate onswitching to heating modeafter complete of defrostingduring heating?
(S1996)
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ESIEN05-04 Troubleshooting
Part 3 – Troubleshooting 3–15
3
4
5
11.3.8 Equipment produces loud noise or shakes
Applicable Model All models of SkyAir series
Error DetectionMethod
Error GeneratingCondition
Possible Cause Q Excess charge of refrigerant
Q Air intrudes into refrigerant system
Q Flushing noise due to refrigerant shortage. (Sound of shoo...)
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may beoccurred.
Correction of installationReinforcement for ceilings orwalls
Insert shock absorber inmounting section, orstrengthen the mountingsection.
Normal. The sound is flushingnoise of gas (refrigerant)inside air conditioning unitInsert cushion materials to thepipe support such as saddle.
Normal. The noise is a soundgenerated at the time of gas(refrigerant) flow change orstopDisassemble and removeparts contact.
Normal. Operation sound ofdraining device
Correct piping manually or
attach a dead weight to pipe
Normal. Creak generates byshrinkage of resin parts due totemperature change.
Normal.
After vacuum drying, chargecorrect amount of refrigerant.
∗ Excess charge of refrigerant∗ Air intrudes into refrigerant
system∗ Flushing noise due to
refrigerant shortage. (Soundof shoo...)
NO
YES
YES
YES
YES
YES
Doesthe noise generate
with vibration of wholeceilings and
walls?
YES
NO
NO
NO
Doesthe noise generate
with vibration of unitmounting section?
Continuousslight noise of "shoo..."
during cooling or
defrosting
YES[Power supply side]
Is the piping secured?
Sound of"shoo..." generates
just after operation start orstop, or defrosting
start or stop.
NO
NO
Does thefan contact with other
parts?Sound of
"shoo..." generatesduring cooling or after
operationstop.
NO
NO
Does thepipe contact with
casing?Creak during
heatingand after operationstop
YES
NO
YES
YES
NO
Isthe noise
flushing sound frompressure reducing valve
or capillarytube?
YES
[Installation work side]
(S1997)
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Troubleshooting ESIEN05-04
3–16 Part 3 – Troubleshooting
1.3.9 Equipment discharges dust
Applicable Model All models of SkyAir series
Error DetectionMethod
Error GeneratingCondition
Possible Cause Q Carpet
Q Animal's hair
Q Application (cloth shop,...)
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may beoccurred.
Dust collected inside the indoorunit are blown out.Cleaning for inside of indoor unitis necessary.
Dust collected inside the indoorunit are blown out.Cleaning for inside of indoor unitis necessary.
Install air filter.
Doesthe trouble
generate at the timeof operation start again after
extended period ofoperation?
YES
YES
NO
NO
Is air filter equipped?
(S1998)
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ESIEN05-04 Troubleshooting
Part 3 – Troubleshooting 3–17
3
4
5
11.3.10 remote control LCD displays " 88 "
Applicable Model All models of SkyAir series
Error DetectionMethod
Error GeneratingCondition
Possible Cause
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may beoccurred.
The unit is checking to confirmthat remote controller is normal.Indication appears for short time.
Turn the switch to "Normal", andreset power supply.
Check the unit based onindoor unit LED and outdoorunit LED. (Trouble Shooting)
Troublegenerates just after power
supply ON
YES
YES
NO
NO
Is theposition of (SS 1) onindoor unit PCB at
"Emergency"?
(S1999)
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Troubleshooting ESIEN05-04
3–18 Part 3 – Troubleshooting
1.3.11 Swing flap does not operate
Applicable Models FUQ, FHQ, FAQ100
Method ofMalfunctionDetection
Utilizes ON/OFF of the limit switch when the motor turns.
MalfunctionDecisionConditions
When ON/OFF of the micro switch for positioning cannot be reversed even through the swing flapmotor for a specified amount of time (about 30 seconds).
Remark Some functions can force the swing flap into a fixed position, altough swing mode is selected on theremote control. This is not an unit error, but a control function to prevent draft to the customer.
Before starting the troubleshooting, make sure the swing flap is not forced into such a fixed position.(e.g. Hot start, defrost operation, thermostat OFF in heating operation or freeze prevention in coolingoperation. For details see "Fan and Flap Operations" on page 2-22 )
Possible Causes Q Faulty swing motor
Q Faulty micro switch
Q Faulty connector connection
Q Faulty indoor unit PC board
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ESIEN05-04 Troubleshooting
Part 3 – Troubleshooting 3–19
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4
5
1Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may beoccurred.
Connect correctly.
Connect correctly.
Does the flap swing?
Is continuity/nocontinuity reversed?
YES
NO
NO
YES
YES
YES
Replace the indoor unitPC board.
Replace the swingmotor assembly.
NO
220 - 240 VAC?NO
YES
NO
(S2577)
Isthe limit
switch’s transferconnector correctly
connected?
Turn the power supply off onceand back on, and checkwhether the swing flap motorswings when the power supplyis turned back on.
Disconnect X14A, turn thepower supply off once and backon, and check if the limit switchhas continuity when the powersupply it turned back on.
Turn the power supply off onceand back on, and measure theoutput voltage of connectorX29A when the power supply isturned back on.
Arethe connectors
correctly connected toX29A and X14A on
the PC board?
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Troubleshooting ESIEN05-04
3–20 Part 3 – Troubleshooting
1.4 Procedure of Self-Diagnosis by remote control
The inspection/testbutton
The following modes can be selected by using the [Inspection/Test Operation] button on theremote control.
Indoor unit settings can be made.Q Filter sign timeQ Air flow directionQ Others
Service data can be obtained.Q Malfunciton code historyQ Temperature data of various sections
Service settings can be made.Q Forced fan ONQ Air flow direction/volume setting
Depress Inspection/Test Operationbutton for more than 4 seconds.
Following codes can be checked.Q Malfunction codesQ Indoor model codeQ Outdoor model code
Press Inspection/Test Operation button once.
Press Inspection/Test Operation button once.
Press Inspection/Test Operation button once.Or after 30 minutes.
Depress Inspection/Test Operationbutton for more than 4 seconds.
Press Inspection/Test Operationbutton once.
After 10 seconds
Thermostat is forcibly turned on.
Localsettingmode
Servicemode
Normalmode
Inspectionmode
Testoperation
mode
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ESIEN05-04 Troubleshooting
Part 3 – Troubleshooting 3–21
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4
5
11.5 Fault-diagnosis by Wired remote control
Explanation If operation stops due to malfunction, the remote control’s operation LED blinks, and malfunction codeis displayed. (Even if stop operation is carried out, malfunction contents are displayed when inspection
mode is entered.) The malfunction code enables you to tell what kind of malfunction caused operationto stop. See page 3-26 for malfunction code and malfunction contents.
Inspection / test button
Inspection display Malfunction code
Indoor unit No. in whicha malfunction occurs
Operation lamp
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Troubleshooting ESIEN05-04
3–22 Part 3 – Troubleshooting
1.6 Fault-diagnosis by infrared remote control
Introduction Contrary to the wired remote control, the infrared remote control does not display the error code.Instead, the operation LED on the light reception section flashes.
Checking To find the error code, proceed as follows:
Step Action
1 Press the INSPECTION/TEST button to select “inspection”. The equipment enters theinspection mode. “0” flashes in the UNIT No. display.
0
INSPECTION/TEST
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ESIEN05-04 Troubleshooting
Part 3 – Troubleshooting 3–23
3
4
5
12 Press the UP or DOWN button and change the UNIT No. until the receiver of the remote
control starts to beep.
3 Press the MODE selector button.The left “0” (upper digit) indication of the error codeflashes.’
Step Action
If you hear... Then...
3 short beeps Follow all steps below.
1 short beep Follow steps 3 and 4. Continue theoperation in step 4 until you hear a con-tinuous beep. This continuous beepindicates that the error code is con-firmed.
1 continuous beep There is no abnormality.
UPDOWN
MODE
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Troubleshooting ESIEN05-04
3–24 Part 3 – Troubleshooting
4 Press the UP or DOWN button to change the error code upper digit until the receiver ofthe remote control starts to beep.
5 Press the MODE selector button.The right “0” (lower digit) indication of the error codeflashes.
Step Action
If you hear... Then...
2 short beeps The upper digit matches.
1 short beep No digits match.
1 continuous beep Both upper and lower digits match.
UPDOWN
UP
DOWN
MODE
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ESIEN05-04 Troubleshooting
Part 3 – Troubleshooting 3–25
3
4
5
16 Press the UP or DOWN button and change the error code lower digit until the receiver of
the remote control generates a continuous beep.
7 Press the MODE button to return to normal status. If you do not press any button for atleast 1 min, the remote control returns automatically to normal status.
Step Action
UPDOWN
UP
DOWN
MODE
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Troubleshooting ESIEN05-04
3–26 Part 3 – Troubleshooting
1.7 Overview of Error Codes
Q In the case of the shaded error codes, “inspection” is not displayed. The system operates, but besure to inspect and repair it.
Notes: 1 There is a possibility of open phase power supply, check power supply also.
2 Operation when a malfunction occurs may differ according to the model.
Malfunction Code Contents/Processing RemarksA1 Failure of PC board ass’y for indoor unitA3 Malfunction of drain water level systemA6 Indoor unit fan motor overload / overcurrent / lock (Note 1)AF Abnormal drain water level Activation of float switch during compressor off.AJ Failure of capacity setting Either capacity data is set incorrectly, or capacity
has not been set for the data ICC4 Malfunction of heat exchanger temperature
sensor systemC5 Malfunction of gas piping temperature sensor
systemC9 Malfunction of suction air temperature sensor
systemCC Malfunction of humidity sensor system FCQ-D only.CJ Malfunction of remote control air temperature
sensor system
Failure of remote control air thermistor.
Unit can be operated by indoor unit thermistor.U4/UF Failure of transmission (between indoor andoutdoor unit)
Transmission between indoor and outdoor unit isnot being correctly carried out. (Note 1, Note 2)
U5 Failure of transmission (between indoor unit andremote control)
Transmission between indoor and remote controlis not being correctly carried out.
U8 Failure of transmission (between “main” and“sub” remote control
Transmission between “main” and “sub” remotecontrol is not being correctly carried out.
UA Failure of fieldsetting System fieldsetting error pair, twin, triple, doubletwin or wrong capacity class.
UC Address error of central remote control
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ESIEN05-04 Troubleshooting
Part 3 – Troubleshooting 3–27
3
4
5
11.8 Troubleshooting by LED Indications on the Indoor Unit
Foreword Troubleshooting can be carried out by service monitor LED (green). (Blinks when normal)
w : LED on / x : LED off / c : LED blinks / — : No connection with troubleshooting
Notes: 1 When the INSPECTION/TEST button of remote control is pushed, INSPECTION display blinksentering INSPECTION mode.
2 In the INSPECTION mode, when the ON/OFF button is pushed and held for 5 seconds or more,the aforementioned malfunctioning history display is off. In this case, after the malfunction codeblinks 2 times, the code display turns to “00” (=Normal) and the unit No. turns to “0”. TheINSPECTION mode automatically switches to the normal mode (set temperature display).
3 Operation halts due to malfunction depending on the model or condition.
4 If LED-B is off, the transmission wiring between indoor and outdoor unit may be incorrect ordisconnected. Before performing the previously described troubleshooting, check the transmissionwiring.
5 Troubleshoot by turning off the power supply for a minimum of 5 seconds, turning it back on, andthen rechecking the LED display.
MicrocomputerNormal Monitor
TransmissionNormal Monitor Contents/Processing
HAP (LED-A) HBP (LED-B)
c c Indoor unit normal → Outdoor unit trouble shooting
c w Incorrect transmission wiring between indoor and out-door unit
x If outdoor unit’s LED-A is off, proceed outdoor unit’strouble shooting. If outdoor unit’s LED-A blinks, failure ofwiring or indoor or outdoor unit P.C board ass’y. (Note 4)
w — Failure of indoor unit PC board ass’y (Note 5)
x Malfunction of power supply or failure of PC board ass’yor broken transmission wire between indoor and outdoorunit. (Note 5)
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Troubleshooting ESIEN05-04
3–28 Part 3 – Troubleshooting
1.9 Troubleshooting by remote control Display / LED Display
Explanation forSymbols
c : LED blinks / w : LED on / x : LED off / — : No connection with troubleshooting
: High probability of malfunction{ : Possibility of malfunction
: Low probability of malfunction — : No possibility of malfunction (do not replace)
1.9.1 Indoor Malfunctions
Indoor
Unit Mal-functions
Indoor Unit
LED DisplayNote 2
remote
controlDisplay
Location of Malfunction Contents of Malfunction Details of
Malfunction(ReferencePage)
H1P H2P Otherthan PCBoard
PC Board
Out-doorUnit
IndoorUnit
remotecontrol
c c *Note 1 — — — — Normal → to outdoor unit —c w A1 — — { — Malfunction indoor unit PC
board (For troubleshoot-ing by LED, refer to p. 27 .)
3–32c x
w —x —c c A3 — — — Malfunction of drain water
level system3–33
c c AF — — — Malfunction of drain sys-tem
3–35
c c A6 — — Indoor unit fan motor lock 3–36c c AJ — { — Malfunction of capacity
setting3–38
c c C4 — — Malfunctioning heatexchanger thermistor sys-tem.
3–40
c c C5 — — Malfuncioning gaspipethermistor system.
3–40
c c C9 — — Malfunctioning suction airthermistor system.
3–40
c c CC — — — — Malfunctioning of humiditysensor system
3–43
c c CJ — — — Malfunctioning remotecontrol air thermisto
3–42
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ESIEN05-04 Troubleshooting
Part 3 – Troubleshooting 3–29
3
4
5
11.9.2 System Malfunctions
Outdoor Unit
Malfunction
remote
controlDisplay
Location of Malfunction Contents of Malfunction Details of
Malfunction(Reference
Page)
Otherthan PCBoard
PC Board
OutdoorUnit
IndoorUnit
remotecontrol
U4or UF
{ { — Transmission error (betweenindoor and outdoor unit)
3–4
U5 — { { Transmission error (betweenindoor and remote control)
3–6
U8 — { { Transmission error between“main” remote control and “sub”remote control
3–7
UA — { — Excessive indoor units connectedto this system.
3–8
UC — — { Centralized address setting error 3–10
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Troubleshooting ESIEN05-04
3–30 Part 3 – Troubleshooting
1.10 Overview of the Indoor Safety Devices
Thermal protector Thermal fuse fan motor
Abnormal Reset (automatic)
FCQ35, 50, 60, 71B >130°C +/-5°C <83°C +/-20°C N.A.
FCQ100, 125B >140°C +/-5°C <45°C +/-15°C N.A.
FCQ71, 100, 125, 140D N.A. N.A. N.A.
FFQ25, 35, 50, 60B >130°C +/-5°C <83°C +/-20°C N.A.
FBQ35, 50, 60, 71,100, 125B N.A. N.A. >152 +/-2°C
FDQ125, 200, 250B N.A. N.A. >160 °C
FHQ35, 50, 60, 71, 100, 125B >130°C +/-5°C <83°C +/-20°C N.A.
FUQ71, 100, 125B >130°C +/-5°C <83°C +/-20°C N.A.
FAQ71, 100B >130°C +/-5°C <83°C +/-20°C N.A.
FDEQ71, 100, 125B N.A. N.A. >152 +/-2°C
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ESIEN05-04 Error Codes
Part 3 – Troubleshooting 3–31
3
4
5
1
3
Part 3
2 Error Codes
2.1 What Is in This Chapter?
Introduction In the first stage of the troubleshooting sequence, it is important to correctly interpret the error code onthe remote control display. The error code helps you to find the cause of the problem.
Shutdown For some errors, the system only shuts down when the error occurs several times. This means thatyou have to wait until the system shuts down to be able to see the flashing LED on the front panel andthe error code on the remote control.
Overview This chapter contains the following topics:
Topic See page
2.2–Malfunctioning Indoor PCB (A1) 3–32
2.3–Malfunction of Drain Water Level System (A3) 3–33
2.4–Malfunctioning Drain System (AF) 3–35
2.5–Indoor Unit Fan Motor Lock (A6) 3–36
2.6–Malfunctioning Capacity Setting (AJ) 3–38
2.7–Thermistor Abnormality (C4, C5, C9) 3–40
2.8–Malfunctioning remote control Air Thermistor (CJ) 3–42
2.9–Malfunctioning of Moisture Sensor System (CC) 3–43
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Error Codes ESIEN05-04
3–32 Part 3 – Troubleshooting
2.2 Malfunctioning Indoor PCB ( A1)
Error code A1
LED indications The table below shows the LED indications.
Error generation The error is generated when the data from the EEPROM is not received correctly.
EEPROM (Electrically Erasable Programmable Read Only Memory): A memory chip that holds itscontent without power. It can be erased, either within the computer or externally and usually requiresmore voltage for erasure than the common +5 volts used in logic circuits. It functions like non-volatileRAM, but writing to EEPROM is slower than writing to RAM.
Causes The possible cause is a malfunctioning indoor PCB.
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may beoccurred.
Operation HAP (green) HBP (green)
Normal c c
Malfunctioning
c w
c x
w —
x —
Switch the power off and on again to restart.
The malfunction may be caused by anexternal factor, rather than damaged parts.Locate the cause and correct the situation.
Replaceindoor PCB.No
Yes
Normal reset?
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ESIEN05-04 Error Codes
Part 3 – Troubleshooting 3–33
4
5
1
3
2.3 Malfunction of Drain Water Level System ( A3)
Error code A3
LED indications The table below shows the LED indications.
Error generation The error is generated when the water level reaches its upper limit and when the float switch turnsOFF.
Causes The possible causes are:
Q Malfunctioning drain pump
Q Improper drain piping work
Q Drain piping clogging
Q Malfunctioning float switch
Q Malfunctioning indoor unit PCB
Q Malfunctioning short-circuit connector X15 on PCB.
Operation HAP (green) HBP (green)
Normal c c
Malfunctioning c c
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Error Codes ESIEN05-04
3–34 Part 3 – Troubleshooting
Troubleshooting
Remark If "A3" is detected by a PC board which is not mounted with X15A, the PC board is defective.
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may beoccurred.
Begin
Isthe unit a
cassette or built-intype?
Is
a drainpump connected tothe indoor unit PCB?
Doesthe drain pump
work after restartingoperation?
Is thedrain water
level abnormallyhigh?
Isthe float
switch connected toX15A?
220-240VAC?
Istherecontinuity?
Isthe
optional drainraising mechanism
connected?
Isthe
short-circuitconnector connected to X15A
on the indoor unitPCB?
Connect theShort-circuitconnector.
Replace theShort-circuitconnector
Set to"emergency" andcheck the voltage
of X25A.
Replace thedrain pump.
Remove the float switch fromX15A, short-circuit X15A, and
restart operation.
Replace indoor unit PCB.
There is a malfunctionof the drain system.
Replace floatswitch.
Replace theindoor unit PCB.
Connectfloat switch
Connect thedrain pump.
Replace indoor unit PCB.
Check the continuity of theshort-circuit connector.
No
Yes
Yes
Yes
Yes Yes Yes
Yes
Yes
Yes
No No
Yes
No
No
No
No No
No
No
Yes
Does "A3"appear on the remote
controller display?
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ESIEN05-04 Error Codes
Part 3 – Troubleshooting 3–35
4
5
1
3
2.4 Malfunctioning Drain System ( AF)
Error code AF
LED indications The table below shows the LED indications.
Error generation The error is generated when the float switch changes from ON to OFF while the compressor is OFF.
Causes The possible causes are:
Q Error in the drain pipe installation
Q Malfunctioning float switch
Q Malfunctioning indoor unit PCB.
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may beoccurred.
Operation HAP (green) HBP (green)
Normal c c
Malfunctioning c c
Iswa ter
dra ina ge s ys temnorm a l?
Isdra in-u p
kit ins ta lled?
Isdra in pu mp
norm a l?
Doe s dra inwa ter flow in rever s e
du ring non-oper a tion?
Is
a mo u ntof circ u la ted dr a in
wa ter exce ss ive a fterpu mp s top s
oper a tion?
Clogged dr a in wa ter di s ch a rges ys temClogged dr a in pu mpFau lty floa t s witch
Repl a ce indoor u nit PCB.Check to s ee if dr a in-u p heighta nd horizont a l pipe lengthexceed s pecific a tion s .
Check j u mper connector X15A.
Check dr a in p u mp a nd dr a inpipe.
Check w a ter dr a ina ge s ys tem.Check to s ee if dr a in-u p heighta nd horizont a l pipe lengthexceed s pecific a tion s .
Fau lty tra p in w a ter dr a ina ges ys tem
Repl a ce indoor u nit PCB.
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
∗ In FHQ a nd FAQ pro b lem s ca n a ls oocc u r in the option a l dra in-u p kit.
Po ss ib le fa ilu re of flo a t s witch.Check to s ee if dr a in-u p heighta nd horizont a l pipe lengthexceed s pecific a tion s .
NOAre flo a ts witch a nd dr a in
pipe norm a l?
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Error Codes ESIEN05-04
3–36 Part 3 – Troubleshooting
2.5 Indoor Unit Fan Motor Lock ( A6 )
Error code A6
LED indications The table below shows the LED indications.
Error generation The error is generated when the fan rotations are not detected while the output voltage to the fan is atits maximum.
Causes The possible causes are:
Q Malfunctioning indoor unit fan motor
Q Broken or disconnected wire
Q Malfunctioning contact
Q Malfunctioning indoor unit PCB.
Operation HAP (green) HBP (green)
Normal c c
Malfunctioning c c
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ESIEN05-04 Error Codes
Part 3 – Troubleshooting 3–37
4
5
1
3
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be
occurred.
Check theconnections of X20A
and X26A.
Check indoor unitfan motor andmotor wiring.
Are X20Aand X26A properly
connected?
Is there about 12VDC?
Connect X20Aand X26Acorrectly.
Unplug X26Aand switch the
power supply on.
Check the voltagebetween pins 1and 3 of X26A.
Replace indoor unit PCB.
No
No
Yes
Yes
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Error Codes ESIEN05-04
3–38 Part 3 – Troubleshooting
2.6 Malfunctioning Capacity Setting ( AJ )
Error code AJ
LED indications The table below shows the LED indications.
Error generation The error is generated when the following conditions are fulfilled:
Causes The possible causes are:
Q Malfunctioning capacity setting adapter connection
Q Malfunctioning indoor unit PCB.
Capacity settingadapter
The capacity is set in the PCB’s memory IC. A capacity setting adapter that matches the capacity ofthe unit is required in the following case:
In case the indoor PCB installed at the factory is for some reason changed at the installation site, thecapacity will not be contained in the replacement PCB. To set the correct capacity for the PCB youhave to connect a capacity setting adapter with the correct capacity setting to the PCB. The capacitysetting for the PCB will become the capacity setting of the adapter because the capacity settingadapter has priority.
Operation HAP (green) HBP (green)
Normal c c
Malfunctioning c c
Condition Description
1 Q The unit is in operation.
Q The PCB’s memory IC does not contain the capacity code.
Q The capacity setting adapter is not connected.
2 Q The unit is in operation.
Q The capacity that is set, does not exist for that unit.
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ESIEN05-04 Error Codes
Part 3 – Troubleshooting 3–39
4
5
1
3
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may beoccurred.
Isthe
capacity settingadapter plugged intoX23A of the indoor
unit PCB?
Is "AJ"displayed on the remote
controller?
Plug a capacitor settingadapter that matches the
capacity of the unit into X23A.
The malfunction was caused by amissing capacity resistor.
Switch the power supply off andback on again.
Check if the capacity settingadapter is plugged into X23A of the
indoor PCB.
Replace indoor unit PCB.
No
No
Yes
Yes
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Error Codes ESIEN05-04
3–40 Part 3 – Troubleshooting
2.7 Thermistor Abnormality ( C4, C5, C9 )
Error code The table below describes the two thermistor abnormalities.
LED indications The table below shows the LED indications.
Error generation The error is generated when during compressor operation:
Q Thermistor input > 4.96 V, or
Q Thermistor output < 0.04 V.
Causes The possible causes are:
Q Malfunctioning connector connection
Q Malfunctioning thermistorQ Malfunctioning PCB
Q Broken or disconnected wire.
Checkingthermistors
See page 3–56 .
Error DescriptionC4 Malfunctioning heat exchanger thermistor system.
C5 Malfuncioning gaspipe thermistor system.
C9 Malfunctioning suction air thermistor system.
Operation HAP (green) HBP (green)
Normal c c
Malfunctioning c c
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ESIEN05-04 Error Codes
Part 3 – Troubleshooting 3–41
4
5
1
3
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may beoccurred.
Check the connector connection.
Replace outdoor unit PCB.
Isit
connectedproperly?
Isit normal?
Isthe
contact OK?
Check the thermistor resistance.
Check the contact betweenthermistor and PCB.
Correct contact
Replace thethermistor.
Correct theconnection.No
No
No
Yes
Yes
Yes
C4 : Indoor liquid pipe thermistor (R2T).C5 : Gaspipe thermistor (R3T)C9 : Air suction thermistor (R1T).
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Error Codes ESIEN05-04
3–42 Part 3 – Troubleshooting
2.8 Malfunctioning remote control Air Thermistor ( CJ )
Error code CJ
LED indications The table below shows the LED indications.
Error generation The error is generated when the remote control thermistor becomes disconnected or shorted while theunit is running.
Even if the remote control thermistor is malfunctioning, the system can operate with the systemthermistor.
Causes The possible causes are:
Q Malfunctioning thermistor
Q Broken wire.
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may beoccurred.
Operation HAP (green) HBP (green)
Normal c c
Malfunctioning c c
Turn the power supplyoff once andthen back on
Replace remote controller.
Could be outside cause(noise...) other thanmalfunction
NO
YES
Is"CJ"
displayed on theremote
controller?
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ESIEN05-04 Error Codes
Part 3 – Troubleshooting 3–43
4
5
1
3
2.9 Malfunctioning of Moisture Sensor System ( CC)
Remotecontroller
display
CC
Applicablemodels
FCQ-D
Method ofmalfunctiondetection
Even if a malfunction occurs, operation still continues.Malfunction is detected according to the moisture (output voltage) detected by the moisturesensor.
Malfunctiondecisionconditions
When the moisture sensor is disconnected or short-circuited
Supposedcauses
Q Faulty sensor
Q Disconnection
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may beoccurred.
Is the code"CC" displayed on the
remote controller?
Turn the power supplyoff once and back on.
Yes Replace the moisture sensor PCboard assembly (A4P).
Problem could be caused by externalfactor (noise, etc.) other than malfunction.
No
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Error Codes ESIEN05-04
3–44 Part 3 – Troubleshooting
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ESIEN05-04
Part 4 – Commissioning and Test Run 4–1
4
3
4
5
4
Part 4Commissioning and TestRun
What is in this part? This part contains the following chapters:
Chapter See page
2–Pre-Test Run Checks 4–11
3–Field Settings 4–17
4–Test Run and Operation Data 4–31
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ESIEN05-04
4–2 Part 4 – Commissioning and Test Run
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ESIEN05-04 Error Codes: System Malfunctions
Part 3 – Troubleshooting 4–3
3
4
5
1Part 4
1 Error Codes: System Malfunctions
1.1 What Is in This Chapter?
Introduction In the first stage of the troubleshooting sequence, it is important to correctly interpret the error code onthe remote control display. The error code helps you to find the cause of the problem.
Overview This chapter contains the following topics:
Topic See page
1.2–Malfunction of Transmission between Indoor and Outdoor Unit (U4 or UF) 3–4
1.3–Malfunction of Transmission between Indoor Unit and remote control (U5) 3–6
1.4–Malfunction of Transmission between MAIN remote control and SUBremote control (U8)
3–7
1.5–Malfunctioning Field Setting Switch (UA) 3–8
1.6–Centralized Address Setting Error (UC) 3–10
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Error Codes: System Malfunctions ESIEN05-04
4–4 Part 3 – Troubleshooting
1.2 Malfunction of Transmission between Indoor and Outdoor Unit ( U4 or UF)
Error code U4 or UF
Error generation The error is generated when the microprocessor detects that the transmission between the indoor andthe outdoor unit is not normal over a certain amount of time.
Causes The possible causes are:
Q Wiring indoor-outdoor transmission wire is incorrect
Q Malfunctioning indoor unit PCB
Q Malfunctioning outdoor unit PCB
Q Outside cause (noise...).
Troubleshooting 1 Diagnosis of incorrect or broken/disconnected wiring. If the LEDs on the indoor unit PC board are off,it indicates that the transmission wiring between indoor and outdoor units may be incorrect orbroken/disconnected.
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may beoccurred.
Turn the power supply off once and then back on.
Check of indoor unitmicrocomputer normalHAP
Check of indoor unittransmission
malfunctionHBP
Failure of indoor unit PCB or malfunction of power supplysystem.
Resets normally.Could be outside cause (noise...).
Failure of indoor unit PCB.
Wire correctly.
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO (OFF)
NO (ON or OFF)
To outdoor unit(next page)
Is HAP flashing?
Is HAP flashing?
Isindoor-outdoor
transmission wireconnectedcorrectly?
Doesoutdoor unit
microcomputer normal H1P
flash?
Is H2P on?
Is H1P flashing?
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ESIEN05-04 Error Codes: System Malfunctions
Part 3 – Troubleshooting 4–5
3
4
5
1Troubleshooting 2
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may beoccurred.
Turn the power supplyoff once and then back on.
Turn off the power supply, disconnect the NO.2indoor-outdoor transmissionwire, and turn power supplyback on.
Failure of outdoor unit PCB.
Failure of indoor unit PCB.
Indoor PCB malfunction.
Resets normally.Could be outside cause (noise...).
Failure of outdoor unit PCB or malfunction of power supply system.
Resets normally.Could be outside cause (noise...).
YES
YES
YES
YES
YESCheck of outdoor unitmicrocomputer normal HAP
NO
NO
NO
NO (ON or OFF)
NO (OFF)
Continued fromprevious page
"U4" displaysconstantly?
Is HAP flashing?
Is HAP on?
Is HAP flashing?
Is HAP flashing?
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Error Codes: System Malfunctions ESIEN05-04
4–6 Part 3 – Troubleshooting
1.3 Malfunction of Transmission between Indoor Unit and remote control ( U5 )
Error code U5
Error generation The error is generated when the microprocessor detects that the transmission between the indoor unitand the remote control is not normal over a certain amount of time.
Causes The possible causes are:
Q Malfunctioning remote control
Q Malfunctioning indoor PCB
Q Outside cause (noise...)
Q Connection of two master remote controls (when using two remote controls).
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may beoccurred.
Set one of the remotecontrollers to SUB, turnoff the power supplytemporarily, then restartoperation.
Indoor unit PCBreplacement.
Malfunction could beproduced by noise.Check the surroundingarea and restartoperation.
Change todouble-coreindependent cable.
Failure of remotecontroller PCB or replacement of defective indoor unit PCB.
YES
YES
YES
YESYES
NO
NO
NO NO
Control by 2 remotecontrollers
All indoor unit PCB
microcomputer normal monitors
flashing
Usingmulticore
transmission wiringbetween indoor unit
and remotecontroller
SS1 of bothremote controllers is
set to MAIN.
Resetsnormally when
power supply is turnedoff temporarily.
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ESIEN05-04 Error Codes: System Malfunctions
Part 3 – Troubleshooting 4–7
3
4
5
11.4 Malfunction of Transmission between MAIN remote control
and SUB remote control ( U8)
Error code U8
Error generation The error is generated when, in case of controlling with two remote controls, the microprocessordetects that the transmission between the indoor unit and the remote controls (MAIN and SUB) is notnormal over a certain amount of time.
Causes The possible causes are:
Q Transmission error between MAIN remote control and SUB remote control
Q Connection among SUB remote controls
Q Malfunctioning remote control PCB.
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may beoccurred.
Turn the SS-1 switch of oneremote controller to MAIN.Turn OFF the power supply,and restart operation.
Turn OFF the power once andrestart operation.Replace remote controller PCBif any error is generated.
Turn the SS-1switch of oneremote controller to MAIN.Turn OFF the power supply,and restart operation.
NO NO
YES YES
YES
NO
Controlling with2-remote controller
Both SS-1switches on remote
controllers are turnedto SUB
SS-1 switchon remote controller
PCB is turnedto MAIN
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Error Codes: System Malfunctions ESIEN05-04
4–8 Part 3 – Troubleshooting
1.5 Malfunctioning Field Setting Switch ( UA)
Error code UA
Error generation The error is generated when incorrect field settings have been set for pair/twin/triple/double twin.
Causes The possible causes are:
Q Malfunctioning indoor or outdoor unit PCB
Q Malfunctioning power supply PCB
Q Indoor-outdoor, indoor-indoor unit transmission wiring
Q Malfunctioning remote control wiring.
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ESIEN05-04 Error Codes: System Malfunctions
Part 3 – Troubleshooting 4–9
3
4
5
1Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may beoccurred.
Connect the remote controller correctly.
Check s etting "No. of Connected TwinS ys tem Indoor Unit s " of indoor u nit.
Repl a ce the tr a ns former.
Wiring co u ld b e incorrect, recheck.
Connect correctly.
Indoor u nit PCB repl a cement.
Oper a te s norm a lly.
Connect correctly.
Connect correctly.
S et correctly.
YES
YES
YES
YES
YES
YESYES
YES
YES
YES
NO
NO
NO
NO
NO NO
NO
NO
NO
NO
Is there220-240 VAC
between No.1 and No.3 of X2M (indoor Unit)?
Is the power supply PCB correctly
connected?
Is theindoor-indoor and
indoor-outdoor jumper correctly
connected?
Is theindoor-indoor and
indoor-outdoor jumper correctly
connected?
Is theoutdoor unit used for
Twin system?
Is the remotecontrol connected to
more thanone indoor
unit?
Are themicrocomputer normalmonitors (HAP) of all
indoor unit PCBflashing?
Are thetransmission normalmontiors (HBP) of all
indoor unit PCBflashing?
Operating normally?
Turn the power off once, thenback on, and restart operation.
Is the settingof Pair/Twin/Triple set
correctly?
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Error Codes: System Malfunctions ESIEN05-04
4–10 Part 3 – Troubleshooting
1.6 Centralized Address Setting Error ( UC)
remote controlDisplay
UC
Applicable Models All indoor unit models
Method ofMalfunctionDetection
Indoor unit microcomputer detects and judges the centralized address signal according to thetransmission between indoor units.
MalfunctionDecisionConditions
When the microcomputer judges that the centralized address signal is duplicated
Supposed Causes Q Faulty centralized address setting
Q Faulty indoor unit PC board
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may beoccurred.
Are device s
rela ting to centr a lizedcontrol connected to the
indooru nit?
YES
NO
Ch a nge the s etting s o th a t the centr a lizeda ddre ss is not d u plica ted.
Repl a ce the indoor u nit PC b oa rd.
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ESIEN05-04 Pre-Test Run Checks
Part 4 – Commissioning and Test Run 4–11
3
4
5
1Part 4
2 Pre-Test Run Checks
2.1 What Is in This Chapter?
Introduction This chapter contains the following information:
Q Checks before test run
Q Test run checks
Q Setting the address for the receiver of the infrared remote control
Q Setting the address for the infrared remote control
Overview This chapter contains the following topics:
Topic See page
2.2–Test Run Checks 4–12
2.3–Setting the infrared remote control 4–13
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Pre-Test Run Checks ESIEN05-04
4–12 Part 4 – Commissioning and Test Run
2.2 Test Run Checks
Checks before testrun
Before carrying out a test run, proceed as follows:
Test run checks To carry out a test run, check the following:
Q Check that the temperature setting of the remote control is at the lowest level in cooling mode oruse test mode.
Q Go through the following checklist:
Step Action1 Make sure the voltage at the primary side of the safety breaker is:
Q 230 V ± 10%
2 Fully open the liquid and the gas stop valve.
Checkpoints Cautions or warnings
Are all units securely installed? Q Dangerous for turning over duringstorm.
Q Possible damage to pipeconnections.
Is the earth wire installed according to the applicablelocal standard?
Dangerous if electric leakage occurs.
Are all air inlets and outlets of the indoor and outdoorunits unobstructed?
Q Poor cooling.
Q Poor heating.
Does the drain flow out smoothly? Water leakage.
Is piping adequately heat-insulated? Water leakage.
Have the connections been checked for gas leakage? Q Poor cooling.
Q Poor heating.
Q Stop.
Is the supply voltage conform to the specifications onthe name plate?
Incorrect operation.
Are the cable sizes as specified and according to localregulations?
Damage of cables.
Are the remote control signals received by the unit? No operation.
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ESIEN05-04 Pre-Test Run Checks
Part 4 – Commissioning and Test Run 4–13
3
4
5
12.3 Setting the infrared remote control
Introduction To set the infrared remote control, you have to set the address for:
Q The receiver of the infrared remote control
Q The infrared remote control.
Setting the addressfor the receiver
The address for the receiver of the infrared remote control is factory set to 1. To change this setting,proceed as follows:
Step Action
1 Turn OFF the power.
2 Remove the sealing pad on the top of the receiver.
3 Set the wireless address switch (SS2) according to the table below. You can find the wire-less address switch attached on the PCB of the receiver and it is visible through the smallopening on the back of the receiver.
4 If you use a wired and a infrared remote control for one indoor unit, proceed as follows:
1. Set the wired remote control to MAIN: On the remote control.2. Set the infrared remote control to SUB: On the receiver with the MAIN/SUB switch
(SS1).
5 Seal off the opening of the address switch and the MAIN/SUB switch with the attachedsealing pad.
6 Make sure to also change the address on the remote control.
1 23
M
S S 2
S S 1
S
Sealing pad
Small opening
Receiver
1
2
1
2
1
2
3 3 3
Unit No.
SS2
No. 3No. 2No. 1
SM
SM
SS1
MAIN SUBMAIN/SUB
12
3M
S S 2
S S 1
S
Sealing pad
Small opening
Receiver
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Pre-Test Run Checks ESIEN05-04
4–14 Part 4 – Commissioning and Test Run
Setting the addressfor the infraredremote control
The address for the infrared remote control is factory set to 1. To change this setting, proceed asfollows:
Step Action
1 Hold down the FILTER RESET button and the TEST button for at least 4 s, to go to fieldset mode. The display indicates the field set mode.
2 Press the FAN button to select a multiple setting (A/b), see ‘ Multiple settings A/b’ furtherin this section. Each time you press the button, the display switches between “A” and “b”.
FILTER RESET
TEST
FAN
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ESIEN05-04 Pre-Test Run Checks
Part 4 – Commissioning and Test Run 4–15
3
4
5
13 Press the UP and DOWN buttons to set the address. Set the same address as the
receiver (1, 2 or 3). The receiver does not work with addresses 4, 5 and 6.
4 Press the RESERVE button to confirm the setting.
Step Action
UPDOWN
RESERVE
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Pre-Test Run Checks ESIEN05-04
4–16 Part 4 – Commissioning and Test Run
Multiple settingsA/b
When an outside control (central remote control...) controls an indoor unit, sometimes the indoor unitdoes not respond to ON/OFF and temperature settings commands from this controller.
5 Press the TEST button to quit the field set mode and return to the normal display.
Step Action
UPFAN
RESERVECANCEL
TIMER
DOWN
TEMPTIME
ON / OFF
MODE
SWING
/TEST
˚C
TEST
remote control Indoor unit
Setting remote control dis-play
Control of other air condi-tioners and units No other control
A: Standard All items are displayed. Commands other than ON/OFFand temperature settingaccepted. (1 long beep or3 short beeps emitted)
b: Multi Sys-tem
Only one item is dis-played. This item isonly shown for a fewseconds.
All commands accepted (2 short beeps)
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ESIEN05-04 Field Settings
Part 4 – Commissioning and Test Run 4–17
3
4
5
1Part 4
3 Field Settings
3.1 What Is in This Chapter?
Introduction This chapter contains the following information:
Q How to change the field settings
Q The field settings
Q The factory settings.
Overview This chapter contains the following topics:
Topic See page
3.2–How to Change the Field Settings with the Wired remote control 4–18
3.3–How to Change the Field Settings with the infrared remote control 4–20
3.4–Overview of the Field Settings on the Indoor Units 4–21
3.5–Overview of the Factory Settings on the Indoor Units 4–22
3.6–Setting the Ceiling Height 4–23
3.7–Setting the Filter Counter 4–24
3.8–MAIN/SUB Setting when Using Two remote controls 4–26
3.9–Setting the Centralized Group No. 4–27
3.10–The Field Setting Levels 4–28
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Field Settings ESIEN05-04
4–18 Part 4 – Commissioning and Test Run
3.2 How to Change the Field Settings with the Wired remote control
Installationconditions
The field settings have to be changed with the remote control according to the installation conditions.
Wired remotecontrol
The illustration below shows the wired remote control.
Components The table below contains the components of the wired remote control.
1293
25
22
11
10
37
35
27
26
121417
34
24520 211816 13 15 19
323130
29
28
4
36
33
823 76
No. Component No. Component
1 ON/OFF button 20 Air flow direction icon2 Operation lamp 21 Not available3 Operation mode icon 22 Fan speed icon4 Ventilation mode icon 23 Defrost/hotstart mode icon5 Ventilation icon 24 Air filter cleaning time icon6 Air cleaning icon 25 Element cleaning time icon7 Leave home icon 26 Ventilation mode button8 External control icon 27 Ventilation amount button9 Change-over under centralised control icon 28 Inspection/test operation button10 Day of the week indicator 29 Programming button11 Clock display 30 Schedule timer button12 Maximum set temperature 31 Time adjust button13 Minimum set temperature 32 Temperature adjust buttons14 Schedule timer icon 33 Operation change/ button15 Action icons 34 Setpoint/limit button16 Off icon 35 Fan speed button
17 Inspection required 36 Air flow direction adjust button18 Set temperature display 37 Air filter cleaning time icon reset19 Setting
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ESIEN05-04 Field Settings
Part 4 – Commissioning and Test Run 4–19
3
4
5
1Setting To set the field settings, you have to change:
Q “Mode No.”
Q “First code No.”
Q “Second code No.”.
To change the field settings, proceed as follows:
Step Action
1 Hold down the INSPECTION/TEST button for at least 4 s during normal mode to enterthe “Field setting mode”.
2 Press the TEMPERATURE CONTROL button until the desired “Mode No.” appears.
3 Q If the indoor unit is under group control, all settings for all the indoor units are set at thesame time. Use the codes 10 to 15 to apply this group control and proceed to the nextstep.
Q If you want to set the indoor units of one group individually or if you want to read outthe last settings, use the codes 20 to 25 which are displayed in brackets. Press theTIMER SELECTION button to select the “Indoor unit No.” for which you want to adjustthe field settings.
4 Press the upper part of the PROGRAMMING TIME button to select the “First code No.”.
5 Press the lower part of the PROGRAMMING TIME button to select the“Second code No”.
6 Press the CONFIRMATION button to confirm the changed setting.
7 Press the INSPECTION/TEST button to return to “Normal mode”.
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Field Settings ESIEN05-04
4–20 Part 4 – Commissioning and Test Run
3.3 How to Change the Field Settings with the infrared remote control
Optionalaccessories
If optional accessories are mounted on the indoor unit, the indoor unit setting may have to be changed.
Refer to OH98-2 or the installation manual (optional handbook) for each optional accessory.
infrared remotecontrol
The illustration below shows the infrared remote control.
Setting To set the field settings, you have to change:
Q “Mode No.”
Q “First code No.”
Q “Second code No.”.
To change the field settings, proceed as follows:
RESERVE button
INSPECTION/TEST button
Mode No.Field setting mode
UP button
DOWN button
First code No.
Second code No.MODE button
Step Action
1 Hold down the INSPECTION/TEST button for at least 4 s during normal mode to enterthe “Field setting mode”.
2 Press the MODE button to select the desired “Mode No.”.
3 Press the UP button to select the “First code No.”.
4 Press the DOWN button to select the “Second code No.”
5 Press the RESERVE button to set the present settings.
6 Press the INSPECTION/TEST button to return to the “Normal mode”.
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ESIEN05-04 Field Settings
Part 4 – Commissioning and Test Run 4–21
3
4
5
13.4 Overview of the Field Settings on the Indoor Units
Field settings The table below contains the possible field settings of all indoor units.
ModeNo.
Firstcode No. Description of the setting
Second code No.
01 02 03 04
10 or 20 0 Filter counter Lightcontamination
heavycontamination
— —
1 Filter type Long Super long External Oil mist
2 Remote thermistor of theremote control
TH1 = rem.controller
TH1 = airreturn
— —
3 Filter display Filter indic. No filter indic. — —
11 or 21 0 Number indoor to 1 outdoor Pair Twin Triple Double twin
1 Unified or indiv. set twin Group setting Indiv. setting — —
2 Fan OFF at thermostat OFF LL-speed OFF — —
12 or 22 0 KRP1B51/52/53 X1/X2 output ThermostatON
Option Operation Malfunction
1 EKRORO Forced OFF ON/OFF oper-ation
— —
3 Fan speed heating thermostatOFF
LL-speed Set speed ContinuouslyOFF
—
5 Automatic restart Disabled Enabled — —
13 or 23 0 Ceiling height setting Normal High Extra high —
≤ 2.7 m >2.7 ≤ 3.0 m >3.0 ≤ 3.5 m —
1 Selection of air flow direction(setting for when a blockingpad kit has been inst alled).
4-way flow 3-way flow 2-way flow —
3 Horizontal discharge grill Enabled Disabled — —
4 Air flow direction adjust rangesetting
Draft preven-tion
Standard Ceil soil pre-vention
—
5 Field fan speed changeover airoutlet (domestic only)
Standard Option 1 Option 2 —
6 External static pressure Normal High Low —
14 or 24 0 Additional timer to guard timer 0 s 5 s 10 s 15 s
1b(Only incase ofBRC1D52)
0 Permission level setting Level 2 Level 3 — —1 Leave home function Not
permittedPermitted — —
2 Thermostat sensor in remotecontrol (for limit operation andleave home function only)
Use Not use — —
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Field Settings ESIEN05-04
4–22 Part 4 – Commissioning and Test Run
3.5 Overview of the Factory Settings on the Indoor Units
Factory settings The table below contains the factory settings of all indoor units
Mode No. First codeNo. Second code No.
FCQ FFQ FBQ FAQ FDQ,FEDQ
FUQ FHQ
10 or 20 0 01 01 01 01 01 01 01
1 01 01 01 — 02 01 —
2 02 02 02 — 02 02 02
3 01 01 01 01 01 01 01
11 or 21 0 01 01 01 01 01 01 01
1 01 01 01 01 01 01 012 01 01 01 01 01 01 01
12 or 22 0 01 01 01 01 01 01 01
3 01 01 01 — — — —
5 02 02 02 02 02 02 02
13 or 23 0 01 — — 01 — 01 01
1 01 01 — — — — —
3 — — — — — — —
4 02 02 — — — — —
5 01 01 — 01 — 01 01
6 — — 01 — — — —
14 or 24 0 01 01 01 — 01 01 01
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ESIEN05-04 Field Settings
Part 4 – Commissioning and Test Run 4–23
3
4
5
13.6 Setting the Ceiling Height
Incorrectly setting If you set the controller incorrectly, a connection mistake malfunction “ UA” will appear on the remotecontrol display.
See ’ Malfunctioning Field Setting Switch (UA) ’ on page 3–8 .
Mode No. 13 or 23First code No. 0
Set the second code No., according to the tables below.
FHQ
FAQ
FCQ and FUQ
Second code No. Ceiling-suspended type
01 Height < 2.7 m
02 2.7 m < height < 3.5 m
03 Not used
Second code No. Wall-mounted type
01 Normal
02 High
03 Extra high
Indoor unit Second code No. 4-way outlet 3-way outlet 2-way outlet
FCQ35-71 01 < 2.7 m < 3.0 m < 3.5 m
02 < 3.0 m < 3.3 m < 3.8 m
03 < 3.5 m < 3.5 m —
FCQ100-125-140 01 < 3.2 m < 3.6 m < 4.2 m
02 < 3.6 m < 4.0 m < 4.2 m
03 < 4.2 m < 4.2 m —
FUQ 01 < 2.7 m < 3.0 m < 3.5 m
02 < 3.0 m < 3.5 m < 3.8 m
03 < 3.5 m < 3.8 m —
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Field Settings ESIEN05-04
4–24 Part 4 – Commissioning and Test Run
3.7 Setting the Filter Counter
Mode No. 10 or 20First code No. 0
When the filter counter indication time is set to ON, set the second code No., according to the tablebelow
Fan speed setting atthermostat OFF
When the cool/heat thermostat is OFF, you can stop the indoor unit fan by switching the setting to“Fan OFF”. This setting is used as a countermeasure against odour, for example for barber shops andrestaurants.
You can switch the fan speed to the set fan speed when the heating thermostat is OFF. This setting iscalled “Set Fan Speed” . Default the fan speed is set LL to prevent cold draft.Note: That a combination of modes 11 (21) and 12 (22) is required to enable following settings:
Unit Mode No. First code No. Second code No. Contamination
01 02
light heavy
FCQ
10 or 20 0
±2500 hrs ±1250 hrs
FFQ ±2500 hrs ±1250 hrs
FHQ ±2500 hrs ±1250 hrs
FUQ ±2500 hrs ±1250 hrs
FAQ ±200 hrs ±100 hrsFBQ ±2500 hrs ±1250 hrs
FDQ, FDEQ ±2500 hrs ±1250 hrs
Mode No. - First code No. Second code No.
01 02 03
Second
code No.
01 Cool: Set Speed
Head: LL Speed
Cool: Set Speed
Head: Set Speed
Cool: Set Speed
Head: Continu-ously OFF
02 Cool: OFF + moni-toring at set speed
Heat: OFF + moni-toring at LL speed
Cool: OFF + moni-toring at set speed
Heat: Set speed
Cool: OFF +moni-toring at set speed
Heat: OFF + moni-toring at OFF
12 (22) - 3
12 (21) - 2
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ESIEN05-04 Field Settings
Part 4 – Commissioning and Test Run 4–25
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1Note: Monitoring mode
Air flow directionsetting
Set the air flow direction of the indoor units as given in the table below. This setting is needed whenthe optional air outlet blocking pad has been installed. The “Second code No” is factory set to “01”.
OFF
OFF
ON
ON
INDOORFAN
LL speed or set speed
THERMO
1 min 1 min
6 min 6 min
Mode No First code No Second code No Setting
13 or 23 1
01 F: four-direction air flow
02 T: three-direction air flow
03 W: two direction air flow
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Field Settings ESIEN05-04
4–26 Part 4 – Commissioning and Test Run
3.8 MAIN/SUB Setting when Using Two remote controls
Situation The MAIN/SUB setting is necessary when one indoor unit is controlled by two remote controls. Whenyou use two remote controls (control panel and separate remote control), set one to MAIN and the
other to SUB. You can do this by setting the switch on the remote control’s PCB.
Setting The remote controls are factory set to MAIN, so you only have to change one remote control fromMAIN to SUB. To change a remote control from MAIN to SUB, proceed as follows:
Step Action
1 Insert a flathead screwdriver into the recess between the upper and lower part of theremote control, as shown in the i llustration below. Gently pry off the upper part of the con-troller, working from the two possible positions.
2 Turn the MAIN/SUB changeover switch on the PCB to “S”.
Upper part of the
remote control
Lower part of theremote control
SM
SM
The switch is set toMAIN (factory setting)
Set the switch to SUB.
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ESIEN05-04 Field Settings
Part 4 – Commissioning and Test Run 4–27
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13.9 Setting the Centralized Group No.
When? If you want to carry out centralized control with a central remote control and a unified ON/OFFcontroller, you have to set the group No. for each group with the remote control.
Wired remotecontrol
The illustration below shows the wired remote control.
Setting To set the “Centralized group No.”, proceed as follows:
Individuallyaddress setting If the address must be set individually for each unit, set the “Mode No.” to “ 30 ”. For example, for powerconsumption counting.
SETTING
UNIT No.
GROUP
3
1
4
56 2
7
Unit N°
First Code N°
Second Code N°
Mode N°
Field set mode
Step Action
1 Switch ON the power supply of the central remote control, the unified ON/OFF controllerand the indoor unit(s).
2 Hold down the INSPECTION/TEST button for at least 4 s during normal mode to enterthe “Field setting mode”.
3 Press the TEMPERATURE CONTROL button until “Mode No.” “ 00 ” appears.
4 Press the INSPECTION/TEST button to inspect the group No. display.
5 Set the “Group No.” for each group by pressing the PROGRAMMING TIME button.
The “Group No.” rises in the order of 1—00, 1—01, ..., 1—15, 2—00, ..., 2—15, 3—00,etc.The unified ON/OFF controller however displays only the range of group numbersselected by the switch for setting each address.
6 Press the CONFIRMATION button to enter the selected group No.
7 Press the INSPECTION/TEST button to return to normal mode.
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Field Settings ESIEN05-04
4–28 Part 4 – Commissioning and Test Run
3.10 The Field Setting Levels
Introduction The three field setting levels are:
Q Inspection level
Q Monitoring level
Q Maintenance mode settings.
The inspection level The inspection level is the highest level of the three field setting levels. You can change the views inthe inspection level by pressing the INSPECTION/TEST button.
The flow chart below explains the different windows of the inspection level.
Normal display
Last occurredmalfunction
Indoor model and size
System
Test
Push INSPECTION/TEST button
See possible systemsettings.
Push INSPECTION/TEST button
Push INSPECTION/TEST button
PushINSPECTION/TEST
button
Push INSPECTION/TEST button
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ESIEN05-04 Field Settings
Part 4 – Commissioning and Test Run 4–29
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1Possible systemsettings
The table below contains the possible system settings, which are displayed on the remote control ifthe TEST button is pushed twice shortly.
Changing the modesettings
To enter the monitoring level and to change the maintenance mode settings, proceed as follows:
SizeSoftware
Type
Settings Display Settings Display
35 35
5
FCQ FJ
45 45 FHQ HJ
60 63 FAQ AJ
71 71 FFQ GJ
100 100 FBQ JJ
125 125 FUQ 3J
200 200 FDQ, FDEQ UJ
250 250 —
Step Action
1 Hold down the INSPECTION/TEST button for at least 4 s to enter the field setting mode.
2 Hold down the INSPECTION/TEST button for at least 4 s to enter the maintenancemode.
3 Press the TEMPERATURE CONTROL buttons as many times as needed to select the
mode No. you want.4 Press the TIMER SELECTION button as many times as needed to select the unit No. you
want.
5 Carry out the settings for modes 44 and 45. See “ Maintenance Mode Settings ” further inthis section.
6 Press the CONFIRMATION button to confirm the settings of modes 44 and 45.
7 Press the INSPECTION/TEST button to return to the normal operating mode.
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Field Settings ESIEN05-04
4–30 Part 4 – Commissioning and Test Run
Maintenance ModeSettings
The table below describes the maintenance mode settings.
Mode No. Function Content and operation method Example of the remote control display
40 History errorcodes
Display malfunction history
The history No. can be changed with the pro-gramming time button.
41 Thermistordata display
Select the display thermistor with the pro-gramming time button.
Thermistor:0. Remote control thermistor1. Suction thermistor2. Heat exchanger thermistor.
43 Forced fan ON Turns the fan ON for each unit individually.
44 Individualsetting
Sets fan speed and air flow direction for eachunit individually when using group control.
Settings are made using the “air flow direc-tion adjust” and “fan speed adjust” buttons.Confirmation by the confirmation button isrequired.
45 Unit No.change
Changes unit No.
Set the unit No. after changing with the pro-gramming time buttons.Confirmation by the confirmation button isrequired.
Past error code
Malfunctionhistory
* “00” displayed for 3 and subsequent
0: Newest
2: Oldest -
CODE SETTING
Unit No.
Unit No.
Thermistor
Temperature
SETTING
Unit No.
SETTING
Unit No.
SETTING
Fanspeed
1: Low3: High
Air flow direction
CODE
Unit No.
SETTINGCODE
Field set No
No after change
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ESIEN05-04 Test Run and Operation Data
Part 4 – Commissioning and Test Run 4–31
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4
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1Part 4
4 Test Run and Operation Data
Introduction This chapter contains the following information:
Q General operation data
Overview This chapter contains the following topics:
Topic See page
4.1–General Operation Data 4–32
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Test Run and Operation Data ESIEN05-04
4–32 Part 4 – Commissioning and Test Run
4.1 General Operation Data
Guide Lines forOptimal Operation
Condition
The operation value guide lines when operating under standard conditions (at Rated frequency) bypushing the test run button on the remote control are as given in the table below.
Indoor Unit Fan: “H” Operation Compressor: Rated Frequency
HighPressure(Mpa)
LowPressure(Mpa)
DischargePipeTemperature(°C)
SuctionTemperature(°C)
Indoor UnitSide:DifferentialBetweenSuction Tem-perature andDischargeTemperature(°C)
Outdoor UnitSide:DifferentialBetweenSuction Tem-perature andDischargeTemperature(°C)
Cooling 26 bar ~34 bar 6 bar ~10 bar 60~100 –2~10 8~18 7~12
Heating 25 bar ~32.6 bar
5.3 bar ~9.5 bar
60~100 –6~2 14~30 2~6
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ESIEN05-04 Test Run and Operation Data
Part 4 – Commissioning and Test Run 4–33
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1StandardConditions
During or after maintenance, when the power supply is turned back on, operation restartsautomatically by the “auto restart function.” Please exercise the proper caution.
When perfoming maintenance, you should at least perform the following inspections:
Indoor Unit Conditions Outdoor Unit ConditionsCooling Operation 27°C DB/19°C WB 35°C DB
Heating Operation 20°C DB 7°C DB/6°C WB
Indoor unit
Outdoor unit
Earth
Drain piping
Refrigerant piping
Transmission wiring betweenindoor and outdoor units
To dedicatedbreaker
Is the air filter dirty?
What about voltage and current?
What about switch capacity?What about cable thickness?
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Test Run and Operation Data ESIEN05-04
4–34 Part 4 – Commissioning and Test Run
Correlation ofAir-Conditioner’sOperation Statusand Pressure /Running Current
What happens in comparison to normal values is summarized in the table below.(Measured from 15 ~ 20 minutes or more after operation starts.)
When Cooling
When Heating
Notes: Q ∗1. Water in the refrigerant freezes inside the capillary tube or expansion valve, and is basicallythe same phenomenon as pump down.
Q ∗2. Dirt in the refrigerant clogs filters inside the piping, and is basically the same phenomenon aspump down.
Q ∗3. Pressure differential between high and low pressure becomes low.
Air-Conditioner Status Low Pressure High Pressure Running Current
Air Filter Fouling Lower Lower LowerShort Circuit of Indoor UnitInlet/Outlet Air
Lower Lower Lower
Outdoor Unit Fin Fouling Higher Higher HigherShort Circuit of Outdoor UnitInlet/Outlet Air
Higher Higher Higher
Air Mixed in Refrigerant Higher Higher HigherWater Mixed in Refrigerant ∗1 Lower Lower LowerDirt Mixed in Refrigerant ∗2 Lower Lower LowerLack of Refrigerant (Gas) Lower Lower LowerUnsatisfactory Compression ∗3 Higher Lower Lower
Air-Conditioner Status Low Pressure High Pressure Running Current
Air Filter Fouling Higher Higher HigherShort Circuit of Indoor UnitInlet/Outlet Air
Higher Higher Higher
Outdoor Unit Fin Fouling Lower Lower LowerShort Circuit of Outdoor UnitInlet/Outlet Air
Lower Lower Lower
Air Mixed in Refrigerant Higher Higher Higher
Water Mixed in Refrigerant ∗1 Lower Lower LowerDirt Mixed in Refrigerant ∗2 Lower Lower LowerLack of Refrigerant (Gas) Lower Lower LowerUnsatisfactory Compression ∗3 Higher Lower Lower
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ESIEN05-04
Part 5 – Disassembly and Maintenance 5–1
4
3
4
5
Part 5Disassembly andMaintenance
What is in this part? This part contains the following chapters:
Chapter See page
1–Disassembly and Maintenance 5–3
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ESIEN05-04
5–2 Part 5 – Disassembly and Maintenance
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–3
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5
1
5
Part 5
1 Disassembly and Maintenance
1.1 What Is in This Chapter?
Introduction This chapter contains the following information on the indoor units:
Q Exploded views
Q Components
Q Disassembly procedures
Exploded views andcomponents
This chapter contains the following topics:
Dissassemblyprocedures
This chapter contains the following topics
Topic See page
1.2–FCQ35, 50, 60, 71B 5–4
1.3–FCQ100, 125B 5–6
1.4–FFQ25, 35, 50, 60B 5–8
1.5–FBQ35, 50B 5–10
1.6–FBQ60, 71B 5–12
1.7–FBQ100, 125B 5–141.8–FDQ125, 200, 250B 5–16
1.9–FDEQ71, 100B 5–18
1.10–FDEQ125B 5–20
Topic See page
1.11–FCQ71, 100, 125, 140D 5–22
1.12–FFQ25, 50, 60B 5–42
1.13–FHQ35, 50, 60, 71, 100, 125B 5–79
1.14–FUQ71, 100, 125B 5–94
1.15–FAQ71B 5–111
1.16–FAQ100B 5–122
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Disassembly and Maintenance ESIEN05-04
5–4 Part 5 – Disassembly and Maintenance
1.2 FCQ35, 50, 60, 71B
Exploded view The illustration below shows the exploded view.
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–5
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5
1
5
Components The table below contains the components of the exploded view.
No. Component No. Component
B1 Heat exchanger assy E23 Drain pump
B1.1 Branch pipe (FCQ35) E24 Float switch
B1.1 Distributor with filter E25 Fan motor
B1.2 Single union joint F1 Casing assy
B1.3 Single union joint F6 Inspection cover assy
B1.4 Flare nut F8 Drain pan assy
B1.5 Flare nut F8.1 Drain plug
B1.6 Filter (not for FCQ71) F9 Sound absorbing material
C1 Fan rotor (turbo) F10 Heat exchanger blind plate assy
C2 Lock washer F11 Heat exchanger mounting plate
C3 Nut with washer F12 Hold plate assy
E1 Switch box assy F13 Panel mounting plate
E2 Switch box body F14 Drain pump mounting plate
E4 Bell mouth F15 Vibration isolator
E5 Switch box cover assy 1 F16 Hexagon mounting bolt
E6 Switch box cover 2 F17 Vibration isolator
E7 PCB assy F18 Nut with washerE7.1 Capac.setting adapt. (not for FCQ71) F19 Feeler bulb clamp
E8 Thermistor (Air) F20 Thermistor fixing plate
E9 Capacitor F21 Rubber bush
E10 Terminal F22 Inner heat insulator
E11 Terminal block G1 Drain hose
E12 Power supply transformer G2 Hose band
E14 Wire harness H1 Top tray assy
E15 Wire harness H2 Bottom tray assyE16 Wire harness K1 Drain hose assy
E19 Earth wire K2 Hose band
E20 Earth screw K3 Insulation for joint (liquid)
E21 Thermistor (liquid) K4 Insulation for joint (gas)
E22 Thermistor (coil) (not for FCQ71) K5 Sealing material
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Disassembly and Maintenance ESIEN05-04
5–6 Part 5 – Disassembly and Maintenance
1.3 FCQ100, 125B
Exploded view The illustration below shows the exploded view.
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–7
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5
1
5
Components The table below contains the components of the exploded view.
No. Component No. Component
B1 Heat exchanger assy E25 Fan motor
B1.1 Distributor with filter F1 Casing assy
B1.2 Single union joint F6 Inspection cover assy
B1.3 Single union joint F8 Drain pan assy
B1.4 Flare nut F8.1 Drain plug
B1.5 Flare nut F9 Sound absorbing material
C1 Fan rotor (turbo) F10 Heat exchanger blind plate assy
C2 Lock washer F11 Heat exchanger mounting plate
C3 Nut with washer F12 Hold plate assy
E1 Switch box assy F13 Panel mounting plate
E2 Switch box body F14 Drain pump mounting plate
E4 Bell mouth F15 Vibration isolator
E5 Switch box cover assy 1 F16 Hexagon mounting bolt
E6 Switch box cover 2 F17 Vibration isolator
E7.1 PCB assy F18 Nut with washer
E7.1.1 Thermistor (Air) F19 Feeler bulb clamp
E9 Capacitor F21 Rubber bushE10 Terminal F22 Inner heat insulator
E11 Terminal block G1 Drain hose
E12 Power supply transformer G2 Hose band
E14 Wire harness H1 Top tray assy
E15 Wire harness H2 Bottom tray assy
E16 Wire harness K1 Drain hose assy
E19 Earth wire K2 Hose band
E20 Earth screw K3 Insulation for joint (liquid)E21 Thermistor (liquid) K4 Insulation for joint (gas)
E23 Drain pump K5 Sealing material
E24 Float switch
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Disassembly and Maintenance ESIEN05-04
5–8 Part 5 – Disassembly and Maintenance
1.4 FFQ25, 35, 50, 60B
Exploded view The illustration below shows the exploded view.
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–9
3
5
1
5
Components The table below contains the components of the exploded view.
No. Component No. Component
B1 Heat exchanger assy E21 Lock metal
B1-1 Header assy E22 Single phase AC fan motorB1-1-1 Single union joint 3/8
(Only for FFQ25 and FFQ35)E23 Vibro-isolating bolt
E24 Vibration isolator
B1-1-1 Single union joint 1/2(Only for FFQ50 and FFQ60)
E25 Drain pump ASSY
E25-1 Drain pump
B1-2 Liquid pipe assy E25-2 Drain pump mounting plate
B1-2-1 Distributor E25-3 Mounting bolt
B1-2-2 Single union joint 1/4 E25-4 Rubber vibration isolator
B3 Flare nut E26 Float switch mounting plate assy
B4 Flare nut E26-1 Float switch mounting plateC1 Turbo fan rotor E26-2 Float switch assy
C2 Fan rotation stopper F1 Top plate assy
C3 Insulation nut F2 Front plate sealing assy
E1 Electric components assy F3 Localized die rear plate
E2 Switch box assy F4 Localized die rear plate
E3 Cover, switch box F5 Localized die rear plate
E4 Power transformer F6 Hanger metal assy
E5 Printed circuit assy F7 Blind plate assy
E5-1 Capacity setting adapter F7-1 Grounding wire
E6 Housing, printed circuit F7-2 Grounding screw
E7 Capacitor, fan Motor F7-3 Locking wire saddle
E8 Terminal block F8 H/E mounting plate
E9 Terminal block F9 Hold Plate assy
E10 Wire harness (transmission) F10 Bell mouth assy
E10-1 Fuse holder F11 Inner insulation top panel
E10-2 Fuse F12 Drain pan top assy
E11 Wire harness assy F12-1 Drain plug
E12 Wire harness assy (swing motor) F13 Thermistor mounting spring
E13 Relay harness for fan motor F14 Bushing
E14 Thermistor (for air) G1 Drain hose assy
E15 Thermistor assy K1 Internal drain hose
E15-1 Thermistor K2 Hose band
E16 Grounding screw K3 Insulation for joint (liquid)
E17 Grounding wire K4 Insulation for joint (gas)
E18 Grounding wire K6 Drain hose sealing material
E19 Wire clip K7 sealing material
E20 Wire clip
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Disassembly and Maintenance ESIEN05-04
5–10 Part 5 – Disassembly and Maintenance
1.5 FBQ35, 50B
Exploded view The illustration below shows the exploded view.
S w
i t c h b o x
D r a
i n p u m p a s s y
A c c e s s o r i e s
F a n a s s y
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–11
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5
1
5
Components The table below contains the components of the exploded view.
No. Component No. Component
1 Top plate assy 29 Plain washer
2 Right plate assy 30 Fitting bolt drain pump3 Left plate assy 31 Fan assy
4 Interchangeable plate 31.1 Fan top plate
5 Small bottom plate 31.2 Fan housing bottom
6 Large bottom plate 31.3 Fan housing top
7 Air outlet flange 31.4 Rotor assy
8 Center stay assy 31.4.1 Hexagon socket screw
9 Air filter holding plate assy 31.5 Fan motor
10 Stay for fan top panel assy 31.6 Fan motor stand
11 Fan side blind plate assy 31.7 Motor fixing plate assy
12 Cooler side blind plate assy 32 Switch box assy
13 Pipe setting plate assy 32.1 Switch box body
14 Swtich box cover assy 32.2 Switch box fixing plate
15 Drain pan setting plate 32.3 Terminal fixing plate
16 Drain socket cover assy 1 32.4 Option fixing plate left
17 Drain socket cover assy 2 32.5 Option fixing plate right
18 Hanger bracket 32.6 PCB assy
19 Drain pan assy 32.7 Air thermistor
19.1 Drain socket cap 32.8 Power supply transformer
20 Heat exchanger assy 32.9 Fan motor capacitor
20.1 Distributor with filter assy 32.10 Terminal for remote control
20.2 Single union joint 32.11 Terminal for power supply
20.3 Single union joint 32.12 Wire harness
20.4 Flare nut 32.13 Wire harness
20.5 Flare nut 32.14 Tie wrap with clip
21 Air filter assy 32.15 Capacity setting adapter
22 Service cover assy 33 Thermistor (liquid)
23 Drain pump fixing plate 34 Thermistor (coil)
24 Service cover cap assy 35 Thermistor fixing blade25 Drain pump 36 Metal clamp
26 Float switch 37 Drain hose
27 Drain hose assy 38 Insulation for joint (gas)
28 Vibration absorber 39 Insulation for joint (liquid)
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Disassembly and Maintenance ESIEN05-04
5–12 Part 5 – Disassembly and Maintenance
1.6 FBQ60, 71B
Exploded view The illustration below shows the exploded view.
S w
i t c h b o x
D r a
i n p u m p a s s y
A c c e s s o r i e s
F a n a s s y
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–13
3
5
1
5
Components The table below contains the components of the exploded view.
No. Component No. Component
1 Top plate assy 29 Plain washer
2 Right plate assy 30 Fitting bolt drain pump3 Left plate assy 31 Fan assy
4 Interchangeable plate 31.1 Fan top plate
5 Small bottom plate 31.2 Fan housing bottom
6 Large bottom plate 31.3 Fan housing top
7 Air outlet flange 31.4 Rotor assy
8 Center stay assy 31.4.1 Hexagon socket screw (FBQ60)
9 Air filter holding plate assy 31.5 Fan motor
10 Stay for fan top panel assy 31.6 Fan motor stand
11 Fan side blind plate assy 31.7 Motor fixing plate assy
12 Cooler side blind plate assy 32 Switch box assy
13 Pipe setting plate assy 32.1 Switch box body
14 Swtich box cover assy 32.2 Switch box fixing plate
15 Drain pan setting plate 32.3 Terminal fixing plate
16 Drain socket cover assy 1 32.4 Option fixing plate left
17 Drain socket cover assy 2 32.5 Option fixing plate right
18 Hanger bracket 32.6 PCB assy
19 Drain pan assy 32.7 Air thermistor
19.1 Drain socket cap 32.8 Power supply transformer
20 Heat exchanger assy 32.9 Fan motor capacitor
20.1 Distributor with filter assy 32.10 Terminal for remote control
20.2 Single union joint 32.11 Terminal for power supply
20.3 Single union joint 32.12 Wire harness
20.4 Flare nut 32.13 Wire harness
20.5 Flare nut 32.14 Tie wrap with clip
21 Air filter assy 32.15 Capacity setting adapter (FBQ60)
22 Service cover assy 33 Thermistor (liquid)
23 Drain pump fixing plate 34 Thermistor (coil) (FBQ60)
24 Service cover cap assy 35 Thermistor fixing blade25 Drain pump 36 Metal clamp
26 Float switch 37 Drain hose
27 Drain hose assy 38 Insulation for joint (gas)
28 Vibration absorber 39 Insulation for joint (liquid)
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Disassembly and Maintenance ESIEN05-04
5–14 Part 5 – Disassembly and Maintenance
1.7 FBQ100, 125B
Exploded view The illustration below shows the exploded view.
S w
i t c h b o x
D r a
i n p u m p a s s y
A c c e s s o r i e s
F a n a s s y
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–15
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5
Components The table below contains the components of the exploded view.
No. Component No. Component
1 Top plate assy 31 Fan assy
2 Right plate assy 31.1 Fan top plate3 Left plate assy 31.2 Fan housing bottom
4 Interchangeable plate 31.3 Fan housing top
5 Small bottom plate 31.4 Rotor assy
6 Large bottom plate 31.5 Fan motor
7 Air outlet flange 31.6 Fan motor stand
8 Center stay assy 31.7 Motor fixing plate assy
9 Air filter holding plate assy 31.8 Rotor assy
10 Stay for fan top panel assy 31.8.1 Hexagon socket screw
11 Fan side blind plate assy 31.9 Shaft assy
12 Cooler side blind plate assy 31.10 Coupling
13 Pipe setting plate assy 31.11 Vibro proof rubber assy
14 Swtich box cover assy 31.12 Bearing board
15 Drain pan setting plate 31.13 Bearing fixing plate
16 Drain socket cover assy 1 32 Switch box assy
17 Drain socket cover assy 2 32.1 Switch box body
18 Hanger bracket 32.2 Switch box fixing plate
19 Drain pan assy 32.3 Terminal fixing plate
19.1 Drain socket cap 32.4 Option fixing plate left
20 Heat exchanger assy 32.5 Option fixing plate right
20.1 Distributor with filter assy 32.6 PCB assy
20.2 Single union joint 32.7 Air thermistor
20.3 Single union joint 32.8 Power supply transformer
20.4 Flare nut 32.9 Fan motor capacitor
20.5 Flare nut 32.10 Terminal for remote control
21 Air filter assy 32.11 Terminal for power supply
22 Service cover assy 32.12 Wire harness
23 Drain pump fixing plate 32.13 Wire harness
24 Service cover cap assy 32.14 Tie wrap with clip25 Drain pump 33 Thermistor (liquid)
26 Float switch 35 Thermistor fixing blade
27 Drain hose assy 36 Metal clamp
28 Vibration absorber 37 Drain hose
29 Plain washer 38 Insulation for joint (gas)
30 Fitting bolt drain pump 39 Insulation for joint (liquid)
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–17
3
5
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5
Components The table below contains the components of the exploded view.
No. Component No. Component
1 Top plate assy 6.22 Thermistor
2 Fan assy + fan mounting plate 6.23 Tie wrap with clip3 Side plate right 6.24 PCB assy
4 Side plate left 6.25 Power supply transformer
5 Service cover assy 6.26 Earth wire
6 Switch box assy 6.27 Insulation switch box
6.1 Switch box fixing plate 6.28 Insulation switch box
6.3 Terminal fixing plate 6.29 Insulation switch box
6.4 Magnetic contacor 7 Hook
6.6 Switch box body 8 Filter cover
6.7 Option fixing plate left 9 Fixture heat exchanger right
6.8 Option fixing plate right 10 Fixture heat exchanger left
6.9 Wire harness 11 By-pass sealing plate
6.10 Wire harness 12 Heat exchanger lassy
6.14 Wire harness 13 Drain pan assy
6.15 Wire harness 14 Bottom plate assy
6.16 Wire harness 15 Airfilter
6.17 Wire harness 16 Pipe fixing plate
6.18 PCB assy 17 Clamp
6.19 Locking guard spacer 18 Clamp
6.20 Terminal strip 19 Thermistor fixing
6.21 Thermistor
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Disassembly and Maintenance ESIEN05-04
5–18 Part 5 – Disassembly and Maintenance
1.9 FDEQ71, 100B
Exploded view The illustration below shows the exploded view.
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–19
3
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Components The table below contains the components of the exploded view.
No. Component No. Component
1 Top plate assy 10 Discharge plate assy
2 Suction plate assy 11 Bottom assy3 Air filter 12 Filter holding plate
4 Fan assy 13 Hook
4.1 Fan top plate assy 14 Pipe support plate
4.2 Fan housing bottom (large) 15 Pipe sealing
4.3 Fan housing top (large) 16 Switch box assy
4.4.1 Rotor assy 16.1 Switch box cover assy
4.5 Fan motor assy 16.2 Switch box mounting plate assy
4.6 Fan motor stand 16.3 Resin case
4.7 Motor fixing plate assy 16.4 PCB assy
4.8 Capacitor 5 microf 16.5 Transformer
4.9 Cable holder 16.6 Terminal board
4.15 Hexagon socket screw 16.7 Terminal strip
5 Right side plate assy 16.8 Tie wrap with clip (L=140)
6 Left side plate assy 16.9 Wire harness (X2M - X27A)
7 Heat exchanger assy 16.10 Wire harness (X1M - X5A)
7.1 Distributor with filter assy 16.11 Blind rubber butching
7.2 Single union joint 3/8 16.12 Thermistor (air)
7.3 Flare nut 3/8 16.13 Thermistor (liquid)
7.4 Single union joint 5/8 17
7.5 Flare nut 5/8 18
8 Drain pan sealing assy 19
9 Drain pan fixing 20
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Disassembly and Maintenance ESIEN05-04
5–20 Part 5 – Disassembly and Maintenance
1.10 FDEQ125B
Exploded view The illustration below shows the exploded view.
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–21
3
5
1
5
Components The table below contains the components of the exploded view.
No. Component No. Component
1 Top plate assy 7.5 Flare nut 5/8
2 Suction plate assy 8 Drain pan sealing assy3 Air filter 9 Drain pan fixing
4 Fan assy 10 Discharge plate assy
4.1 Fan top plate assy 11 Bottom assy
4.2 Fan housing bottom (small) 12 Filter holding plate
4.3 Fan housing top (small) 13 Hook
4.4.1 Rotor assy 14 Pipe support plate
4.4.2 Rotor assy 15 Pipe sealing
4.4.2 Rotor assy 16 Switch box assy
4.5 Fan motor assy 16.1 Switch box cover assy4.6 Fan motor stand 16.2 Switch box mounting plate assy
4.7 Motor fixing plate assy 16.3 Resin case
4.8 Capacitor 5 microf 16.4 PCB assy
4.9 Cable holder 16.5 Transformer
4.10 Bearing board 16.6 Terminal board
4.11 Vibro proof rubber assy 16.7 Terminal strip
4.12 Bearing fixing plate 16.8 Tie wrap with clip (l=140)
4.13 Shaft assy 16.9 Wire harness (X2M - X27A)
4.14 Cuppling 16.10 Wire harness (X1M - X5A)
4.15 Hexagon socket screw 16.11 Blind rubber butching
5 Right side plate assy 16.12 Thermistor (air)
6 Left side plate assy 16.13 Thermistor (liquid)
7 Heat exchanger assy 17
7.1 Distributor with filter 18
7.2 Single union joint 3/8 19
7.3 Flare nut 3/8 20
7.4 Single union joint 5/8
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Disassembly and Maintenance ESIEN05-04
5–22 Part 5 – Disassembly and Maintenance
1.11 FCQ71, 100, 125, 140D
Overview This part contains the following topics:
Topic See page
Removal of Suction Grille 5–23
Removal of Air Filter 5–24
Removal of Decoration Panel 5–26
Removal of Horizontal Blade 5–28
Removal of Swing Motor 5–29
Removal of Switch Box 5–31
Removal of PC Board 5–33
Removal of Humidity Sensor and Air Temperature Thermistor 5–35
Removal of Fan Motor 5–36
Removal of Drain Pan, Drain Pump, Float Switch 5–38
Removal of Heat Exchanger Temperature Thermistor 5–41
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–23
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1.11.1 Removal of Suction Grille
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Removing the suction grille c Push the buttons and pull down1 Push the 2 buttons
simultaneously and pulthe suction grille downslowly.
Q When closing, push up thegrille slowly.
2 With the suction grilleopen at an angle of 45°,lift it up to remove it.
d Open te 45° Q Grille is attached with 3 hooks
Suction grille
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Disassembly and Maintenance ESIEN05-04
5–24 Part 5 – Disassembly and Maintenance
1.11.2 Removal of Air Filter
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Removing the air filter1 Open the suction grille.
(Refer to the procedurefor removing the suctiongrille.)
2 Disengage the hooks ofthe air filter by pulling thefilter downward at anangle, and remove thefilter.
Air filter
Tab
Tab
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–25
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2 Mounting the air filter1 Hook the air filter on
projections at the top of2 Force the bottom of the
air filter into projections atthe bottom of the suctiongrille to secure the airfilter.
Step Procedure Points
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Disassembly and Maintenance ESIEN05-04
5–26 Part 5 – Disassembly and Maintenance
1.11.3 Removal of Decoration Panel
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Removing the decorationcovers in the corner ofdecoration panel
Q Remove a string (provided toprevent the decoration coverfrom dropping) from thedecoration cover in the cornerfrom the pin to dismount thedecoration cover.
1 To remove thedecoration covers in thecorner, pull the inside(suction grille side)down.
2 Remove the one screwto dismount the terminalblock box cover, thendisconnect theconnector for swingmotor.For the auto grille,disconnect the autogrille power supplycable from the powersupply terminal block.
3 Loosen the 4 retainingscrews from thedecoration panel.
4 The decoration panel iscaught on the 4 hooksof the main unit.
Decoration cover in the corner
Structure ofmounting fixture
Hook
Mountingfixture
Retaining screw
Terminal block box cover
Connector forswing motor
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–27
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5 Remove the 2 mountingfixtures on the outside(Section A), then removethe 2 mounting fixtures
on the inside (Section B).
6 Remove the decorationpanel.
Q Mounting the decorationcoverin the cornerMount the decoration cover sothat 4 hooks on the decorationcover canengage with the hole in thedecoration panel.
Step Procedure Points
Decoration panel
Mounting fixture
Mounting fixture
Mounting fixture
String
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Disassembly and Maintenance ESIEN05-04
5–28 Part 5 – Disassembly and Maintenance
1.11.4 Removal of Horizontal Blade
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Remove 4 screws each(16 screws in total) todismount the 4 sealmaterials.
2 Remove 2 screws each(16 screws in total) todismount the 8horizontal bladebearings.
Reassembling
Q Make sure that the air outletinsulation material (sealmaterial) is as shown below(may result in dewcondensation).
Seal material
Horizontalbladebearing
Swing motor
Horizontal blade
Air outlet insulation material
Sealmaterial
No catching or gap is allowed forthe seal material
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–29
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1.11.5 Removal of Swing Motor
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points1 Remove the decoration
cover in the cornerlocated right below therefrigerant piping.
2 Remove the 2 swingmotor mounting screws.
3 Disconnect the swingmotor connector.
Q The connector section isprotected with the use of
aluminum tape. Remove thealuminum tape.
Decoration cover in the corner
Swing motor
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Disassembly and Maintenance ESIEN05-04
5–30 Part 5 – Disassembly and Maintenance
Q Caution during swing motorinstallation
Q Protect the connector sectionwith using the aluminum tape.
1. After installing theswing motor, be sure to
turn off the powersupply for reset (forinitializing the vanepositions).
2 Be sure to engage thegears on the motor sideand panel side.(Improper gearengagement results infaulty swing operationand abnormal noise.)
Step Procedure Points
Motor-side gear
Swing motor
Panel-side gear
Motor-side gear
Panel-side gear
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–31
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1.11.6 Removal of Switch Box
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points1 Remove the 2 mounting
screws on the switchbox cover.
2 Remove the 1 mountingscrew on the terminalblock cover.
3 Disconnect eachconnector
(7 connectors in total)connected to the insideof the switch box.
Q Transfer connector x3 pieces
Q Direct connector x 4pieces
Switch box cover
Terminal block boxcover
remote control
Moisture sensor
Heat exchangertemperaturethermistor Float switch
Drain pump
Swing motor
For powersupplyconnection Swing motor
Moisture sensor
remote control
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Disassembly and Maintenance ESIEN05-04
5–32 Part 5 – Disassembly and Maintenance
4 Disconnect theconnector for fan motor.
Q For FCQ71D : Directconnector
Q For FCQ100~140D: Relayconnector
5 Remove the groundingwire mounting screw.
6 Remove the switch boxfixing screw.
7 Tilt the switch box in thedirection shown by thearrow, then draw theentire switch box out.
(Status after removal)
Step Procedure Points
Switch box fixing screw
Fan motor
Grounding wire
Inverter PC board(for RZP100~140D models only)
Power supply PC board
Control PC board
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–33
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1.11.7 Removal of PC Board
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:Step Procedure PointsQ Remove the switch box
according to the procedurefor removing the switch box.
1 Remove 2 switch boxmounting screws toopen the box.
1 Disconnect the control PCboard.
1 Disconnect the 2connectors between thepower supply and
control PC boards, thendraw the control PCboard out in thedirection shown by thearrow.
2 Disconnect the inverter PCboard.1 Disconnect the harness
from the 2 tabsprovided in the box.
2 Draw the inverter PCboard out in thedirection shown by thearrow.
Tabs
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Disassembly and Maintenance ESIEN05-04
5–34 Part 5 – Disassembly and Maintenance
3 Disconnect the powersupply PC board.
1 Disengage the 3 tabson the front by pressing
the back of the PCboard in the directionshown by the arrow,then remove the powersupply PC board.
Step Procedure Points
Tabs
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–35
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1.11.8 Removal of Humidity Sensor and Air Temperature Thermistor
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure PointsQ Remove the terminal block
box cover according to theprocedure for removing theswitch box.
1 Disconnect theconnector for humiditysensor.
Q The moisture sensor and airtemperature thermistor isintegrated.
2 Disengage the 3 tabs toremove the humidity
sensor.
Humidity sensor
TabsConnector Tab
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Disassembly and Maintenance ESIEN05-04
5–36 Part 5 – Disassembly and Maintenance
1.11.8 Removal of Fan Motor
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure PointsQ Remove the terminal block
box cover according to theprocedure for removing theswitch box, then disconnectthe following connectors.Transfer connectorz Wired remote controlz Swing motorz Humidity sensorConnector built in the
switch boxz Connector used forpower supply cables
1 Removing the bell mouth.1 Disconnect the 2 remote
control cables and 3power supply cables.
2 Disconnect the drainpump and float switchwiring from bell mouth.
(* 1)3 Remove the 5 mounting
screws on the bell mouth.* 1: At this time, do not cut theclamp material attached to thedrain pan near the switch box.Loosen the mounting screw toremove the clamp material.
For heat pump
For float switch
Remotecontrollercable
Power supply cable
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–37
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2 Removing the fan rotor.1 Remove the resin nut and
fan rotor retainer todismount the fan rotor.
3 Remove the fan motor.1 Disconnect the 2
connectors on the fanmotor.
2 Remove the nut withcollar and vibro-isolatingrunner to dismount thefan motor.
Step Procedure Points
Fan rotor retainer
Resin nut
Vibro-isolatingrubber
Nut with collar
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Disassembly and Maintenance ESIEN05-04
5–38 Part 5 – Disassembly and Maintenance
1.11.10 Removal of Drain Pan, Drain Pump, Float Switch
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:Step Procedure Points1 Removing the drain pan1 Remove the drain socket
cap to discharge water.2 Remove the 5 mounting
screws to pull the drainpan out downward.
Drain socket cap
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–39
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2 Removing the drain pump1 Cut the clamp material.2 Pull the drain hose out.3 Remove the 3 screws
on the drain pumpmounting plate.
4 Remove the 2 mountingscrews on the drainpump.
5 Displace the drain pumpsideward to remove it.
Q When removing the drainpump, cut the following clampmaterials.
z Clamp material securing thedrain pump lead wire to thedrain pump mounting plate.
z Clamp material bundling thedrain pump lead wire and float
switch lead wire.
3 Removing the float switch Q When removing the floatswitch, cut the following clampmaterials.
z Clamp material securing thedrain pump lead wire to thedrain pump mounting plate.
z Clamp material bundling thedrain pump lead wire andfloat switch lead wire.
1 Reverse the drain pumpmounting plate whichwas removed accordingto the procedure
described on thepreceding page.
2 Remove the 1 screw,displace the float switchsideward, thendismount the floatswitch.
Step Procedure Points
Clamp material
Drain pump
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Disassembly and Maintenance ESIEN05-04
5–40 Part 5 – Disassembly and Maintenance
[Installation procedure ofdrain pump or float switch]1 Install a spare drain
pump or float switch on
the mounting plate, thenfirmly secure the leadwires using the providedclamp materials (3pieces).
2 Connect the lead wires ofthe drain pump or floatswitch in the originalstate, firmly secure theaforementioned clampmaterials (screw typefixing) to the drain panwith the use of mountingscrews.
Step Procedure Points
Mounting screw(For float switch)
Floatswitch
Float switchlead wire
Mounting plate
Provided clamp material(for bundling)(Fix to the hole in themounting plate)
Drain pumplead wire
Provided clampmaterial(for bundling)
Provided mounting screw(for drain pump)
Pay attention to the mountingdirection of clamp material.
1mm or less
Provided clamp material(for fixing screw)(Fix the lead wires eachother.)
Mountingscrew
DrainPan
Clamp material(for fixing screw)
Engage with the fixing tabs (5 tabs)
Drain pump
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–41
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1.11.11 Removal of Heat Exchanger Temperature Thermistor
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure PointsQ Remove the drain pan
according to the procedurefor removing the drain pan.
1 Cut the clamp material.2 Draw the heat exchange
temperature thermistortogether with theinsulation material out inthe direction shown bythe arrow.
Clampmaterial
Heat exchangertemperature thermistor
Insulationmaterial
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Disassembly and Maintenance ESIEN05-04
5–42 Part 5 – Disassembly and Maintenance
1.12 FFQ25, 50, 60B
Overview This part contains the following topics:
Topic See page
Removal of Suction Grille 5–43
Removal of Air Filter 5–44
Removal of Decoration Panel 5–46
Removal of Horizontal Vane 5–49
Removal of Swing Motor 5–51
Removal of Switch Box 5–53
Removal of Fan Rotor and Fan Motor 5–55
Removal of Drain Pan 5–58
Removal of Drain Pump 5–59
Installation of Drain Pump 5–61
Replacement of Heat Exchanger Thermistor 5–64
Replacement of Heat Exchanger 5–66
Replacement of PC Board 5–72
Replacement of Receiver Section of infrared remote control 5–76
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–43
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1.12.1 Removal of Suction Grille
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Removing the suction grille1 To remove the suction
grille, slide the two tabssimultaneously and pullthe suction grille downslowly.
Q The grille can beinstalled freely in fourdirections. Q When closing, push up the
grille slowly.
2 With the suction grilleopen at an angle of 45°,lift it up to remove it.
(S2630)
(S2631)
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Disassembly and Maintenance ESIEN05-04
5–44 Part 5 – Disassembly and Maintenance
1.12.2 Removal of Air Filter
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Removing the air filter1 Open the suction grille.
(See "Removal ofSuction Grille" .)
2 Disengage the hooks ofthe air filter by pulling thefilter downward at anangle, and remove thefilter.
(S2632)
(S2633)
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–45
3
5
1
5
2 Installation of the air filter1 Hook the air filter to the
protrusions located at thetop of the suction grille.
2 Push the lower section ofthe air filter into theprotrusions located at thebottom of the suctiongrille to secure the airfilter in place.
Step Procedure Points
(S2634)
(S2635)
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Disassembly and Maintenance ESIEN05-04
5–46 Part 5 – Disassembly and Maintenance
1.12.3 Removal of Decoration Panel
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Removing the decorationpanel
1 Remove the switch boxcover and disconnect theconnector of swing motorfrom the harnessconnector of electricparts.
2 Check that theprovisional hanger is inthe position where it canbe engaged with the hookof switch box.
(S2636)
(S2637)
Provisional hanger
Hook of switch box
(S2638)
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–47
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5
1
5
3 The decoration panel isattached with 4 mountingscrews.
Remove the two fixingscrews at the switch boxside first.
4 Loosen the other twoscrews by approx. 10mm.
The decoration panel ishung with these two fixingscrews and theprovisional hanger.
Step Procedure Points
Provisional hanger
Loosen the two screwsby approx. 10 mm
(S2639)
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Disassembly and Maintenance ESIEN05-04
5–48 Part 5 – Disassembly and Maintenance
5 Turn the provisionalhanger to disengage itfrom the hook of switchbox, and slide the
decoration panel in thearrow direction to removethe panel.
Step Procedure Points
(S2640)
(S2641)
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–49
3
5
1
5
1.12.4 Removal of Horizontal Vane
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Removing the decorationpanel
Q Refer to the "Removalof Decoration Panel"
2 Remove the padding atfour corners of framefixed with three screwseach. At that time, peel
the end of black sealingmaterial of discharge portin part.
Q Peel not the anti-sweatmaterial but only sealingmaterial of discharge port.
Note: When restore thesealing material ofdischarge port, be carefulthat no clearance existsbetween padding andsealing material asoriginal installation.
(Otherwise, due drippingmay occur due to leakageof cool air.)
(S2642)
(S2643)
Anti-sweat material
Sealing materialof discharge port
(S2644)
Padding
Sealing materialof discharge port
Anti-sweat material
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Disassembly and Maintenance ESIEN05-04
5–50 Part 5 – Disassembly and Maintenance
3 Remove the two screwsfor each bearing ofhorizontal vane (16screws in total).
4 Remove the horizontalvane.
Step Procedure Points
Fixing screws
Fixingscrews
(S2645)
(S2646)
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–51
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5
1
5
1.12.5 Removal of Swing Motor
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Removing the decorationpanel
Q Refer to the "Removalof Decoration Panel"
2 Pull out the swing motorharness from the wiringgroove.
3 Remove two mountingscrews for swing motor
mounting plate to removethe plate.
4 Turn the horizontal vaneto downward manually,and turn up the panelside gear to disengagethe motor side gear.
5 Remove the swingmotor.
Fixing screw
Wiring groove
(S2647)
(S2648)
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Disassembly and Maintenance ESIEN05-04
5–52 Part 5 – Disassembly and Maintenance
Q Precaution during swingmotor insttallation
1 Engage the swingmotor-side gear with thepanel-side one.
(Otherwise, faultyswinging operation orabnormal noise may becaused.)
Install the motor afterchecking of correct gearengagement.
2 Install the swing motor inreverse process ofremoval procedure.
Q When install the decorationpanel, be careful not to catchthe lead wire.
3 After installing the swingmotor, be sure to turn onthe power switch forresetting (for initializingthe vane positions).
Step Procedure Points
Motor-side gear
Panel-side gear
(S2649)
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–53
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5
1
5
1.12.6 Removal of Switch Box
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
Remove decoration panelfirst.
1 Remove the lid of switchbox.(Two pieces of M4screws)
2 Disconnect theconnection wires foroutdoor units and earthwire. At this time, cut thetie wrap fixing theconnection wires.
Disconnect wire ofremote control also. Atthis time, cut the tie wrapfixing the wire of remotecontrol.
(S2650)
(S2651)
Fixingscrew(M4×12)
Fixing
screw(M5×12)
Fixing screw(M4×12)
Wires for remote controller
Tie wrap
Tie wrap
Outdoor unitconnection wireand earth wire
Outdoor unitconnectionwire terminal
P1P2F1 F2 X17A X18AX25A
X20A
Capacitorfor fan
X15A
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Disassembly and Maintenance ESIEN05-04
5–54 Part 5 – Disassembly and Maintenance
Step Procedure Points
3 Remove five pieces oflead wires from PCB onthe switch box and leadwire connected to the
capacitor for fan motor.(Refer to the list shown inthe right.)
4 Cut tie wraps fixing leadwires of float switch,thermistor for heating andliquid pipe thermistor.
5 Remove two fixingscrews located at bothends of switch box andone screw inside the box.
6 Remove the switch box.
∗ Five pieces lead wires shown below (connect to the PCB) andlead wire connected to the capacitor for fan motor.X15A······Lead wire of float switch
X17A······Lead wire of thermistor for heatingX18A······Lead wire of liquid pipe thermistorX20A······Lead wire of fan motorX25A······Lead wire of drain pump
(S2763)
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–55
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5
1
5
1.12.7 Removal of Fan Rotor and Fan Motor
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
Q Remove the switch box.
Q Remove the bell mouth(Two screws)
Q A convex protrusion isprovided at the position of bellmouth fixing screw to preventmisjudgment with switch boxfixing position.
1 Removing the fan rotor1 Remove the resin nut and
rotation stopper todismount the fan rotor.
Q For removal of switch box,refer to the "Removal of SwitchBox" on page 5- 53 .
2 Remove the resin nutwith spanner.
3 Pull down the fan rotorslowly.
(S2653)
(S2654)
(S2655)
Rotationstopper
Resin nut
When tighten or loosen the fanrotor fixing resin nut,hold the base of the fan.see detail below.
Caution
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Disassembly and Maintenance ESIEN05-04
5–56 Part 5 – Disassembly and Maintenance
4 Make sure to hold thehub as shown in Fig.1when tightening orloosening the fan fixingnut with a spanner.Toavoid deformation andvibration of the fan, donot apply excessivetorque to the shroud(the slash part of Fig.2).
Note: There is noproblem to hold theshroud when carryingor lifting the fan.
2 Removing the fan motor1 Disconnect the harness
connector for motor fromthe motor.
2 Remove the threewasher faced bolts.
Step Procedure Points
Hub Shroud
Fig. 1 Fan fixing method Fig. 2 Do not apply excessive torqueto the area shown in slash
(S2764)
Washer faced bolt
(S2656)
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3 Pull down the fan motorslowly.
Step Procedure Points
(S2657)
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Disassembly and Maintenance ESIEN05-04
5–58 Part 5 – Disassembly and Maintenance
1.12.8 Removal of Drain Pan
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Remove the drain socketto drain water from thedrain hole.
2 Remove the 4 mountingscrews to remove thedrain pan.
Q Remove the drain socket to
drain water from the drain hole.
Q If water is in the drain pan, itcan spill and wet the floor.
Drain water completely orcover the floor with a vinylsheet before removing thedrain pan.
3 Pull down the drain panstraight down.
Drain socket
(S2658)
(S2659)
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–59
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5
1
5
1.12.9 Removal of Drain Pump
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Removing the drain pump1 Remove two screws
fixing float switch ass'y.
(Screw d and e )
2 Remove the float switchass'y.
Q Remove the float switch beforeremoving drain pump in orderto prevent the float switch fromdamage.
Screw
Screw
Screw
(S2660)
(S2661)
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Disassembly and Maintenance ESIEN05-04
5–60 Part 5 – Disassembly and Maintenance
3 Cut the tie wrap fixing thedrain hose.
Remove the screw c
Q When pulling out the drainhose, be sure to wear safetygloves to prevent your fingerfrom injury with heat
exchanger fin.
4 Pull out the drain hose.
5 Remove the drain pump.
Step Procedure Points
Screw
S2662
(S2664)
(S2663)
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–61
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5
1
5
1.12.10 Installation of Drain Pump
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Installing the drain pump1 Put the lead wire in the
wiring groove properly, fixthe drain pump ass'y withscrew c and insert thedrain hose.
Screw c
Wiring groove (S2665)
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ESIEN05-04 Disassembly and Maintenance
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5
1
5
4 Insert the float switchass'y.
At this time, put the lead
wires in the wiring grooveproperly.
5 Install the drain pumptogether with the floatswitch with screw d ande .
Step Procedure Points
(S2661)
Wiring grooveLead wires
Screw
Screw
(S2669)
When install the drainpan, put the lead wiresof float switch and drainpump in wiring grooveand pass the lead wiresabove on the blacksealing material on thedrain pan.(Otherwise, duedripping may occur dueto leakage of cool air.)
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Disassembly and Maintenance ESIEN05-04
5–64 Part 5 – Disassembly and Maintenance
1.12.11 Replacement of Heat Exchanger Thermistor
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Disconnect thegrounding terminal fromthe header.
2 Pull apart the thermistorass'y and motor lead wirefrom the clamps.
Pull out the thermistorfrom the slit of heatexchanger partition plate.
3
4 Remove two screws tothe top panel, then, pullthe partition plate of heatexchanger downward.
(S2670)
ClampClamps
Fan motor lead wire Thermistorass'y
Slit (S2671)
(S2672)
Heat exchangerpartition plate
Fan motor lead wire
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ESIEN05-04 Disassembly and Maintenance
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5
1
5
5 Take out the two tiewraps fixing the antisweat tube of header andthermistor.
(Be sure not to take outother tie wrap.)
Q Heat resistance tie wrap isused. Be sure to use a heatresistance tie wrap wheninstalling new thermistor.
∗ Heat resistance tie wrapParts No. :1278921(Drg No. :4SA90202-1)
6 Pull out the thermistorfrom the insertion pipe.Thermistor for heating :The upper one wrappedwith a yellow tapeThermistor for liquidpipe :The lower one withouttaping
Q Replace thermistor as anass'y. (Two thermistors arebound with special heatresistance tube.)
Step Procedure Points
(S2673)
Anti sweat tube
(S2674)
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Disassembly and Maintenance ESIEN05-04
5–66 Part 5 – Disassembly and Maintenance
1.12.12 Replacement of Heat Exchanger
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Removing the heatexchanger
1 Remove the refrigerantpipe after completion ofrefrigerant collection andpump down operation.
Q This work should be performedwith two personnel includingone person for supporting theheat exchanger to avoid fallingdown during the work.
2 Remove the fixing plateof heat exchanger.
3 Remove the pipe fixingplate mounted with twoscrews.
(S2675)
Heat exchangerfixing plate
Pipe fixingplate
(S2676)
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ESIEN05-04 Disassembly and Maintenance
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5
1
5
4 Remove the heatexchanger.
2 Installing the heatexchanger
1 Insert the heat exchangerin the groove of ceilingpolystyrene foamproperly, and bring thetube plate section of heatexchanger into intimatecontact with the
polystyrene partitionplate correctly.
2 Insert the claw section ofpipe fixing plate into thecontracted part of theexternal plate securely.
Step Procedure Points
(S2677)
Groove of ceiling polystyrene foam.
Polystyrene partition platefor heat exchanger tube plate
(S2678)
Bring the heat exchangertube plate section into intimatecontact with polystyrene partitionplate without clearance.
(S2680)
(S2679)Claw section
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Disassembly and Maintenance ESIEN05-04
5–68 Part 5 – Disassembly and Maintenance
3 Install the heatexchanger mountingplate.
4 Insert two thermistors.
Then cover the header byanti sweat tube.
Q Set the lead wire with yellowtape (for heating) upper sidewhile that with no tape (forliquid) lower side.
5 Reinstall the lead wire ofthermistor and anti sweattube on the originalposition by using twopieces of heat resistancetie wrap.
∗ Heat resistance tie wrapParts No.:1278921(Drg No.:4SA90202-1)
Step Procedure Points
Heat exchangermounting plate
(S2681)
(S2682)Anti sweat tube
(S2673)
Anti sweat tube
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5
1
5
6 Put the heat exchangerpartition plate inside andfix them with two screws.
7 Pass the thermistor ass'ythrough the clamps andthe slit of partition platesecurely as the originalstate.
Pass the lead wire ofmotor also through theclamp securely.
8 Insert the groundingterminal to the header.
Step Procedure Points
(S2672)
Heat exchangerpartition plate
Fan motor lead wire
Clamp Clamps
Slit of partition plate
Fan motor lead wire
Thermistor ass'y
(S2683)
(S2684)
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Disassembly and Maintenance ESIEN05-04
5–70 Part 5 – Disassembly and Maintenance
9 Install the drain panputting the lead wire offloat switch and drainpump into the wire
groove securely.When install the drainpan, put the lead wires inwiring groove and passthe lead wires above theblack sealing material onthe drain pan securely.
(Otherwise, due drippingmay occur due to leakageof cool air.)
10 Installing the bell mouth.
When install the bellmouth, put the lead wiresof fan motor andthermistor into the wiringgroove securely as theywere, taking care that thewires do not contact withfan rotor.
11 Tighten the two screws toinstall the bell mouth.
(Bell mouth is formedwith step.)
Q A convex protrusion isprovided at the position of bellmouth fixing screw to preventmisjudgment with switch boxfixing position.
Step Procedure Points
Wiring groove (S2685)
Wiring grooveFan motor lead wire Thermistor ass'y wire
(S2686)
(S2653)
(S2654)
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5
12 Install the switch box withtwo M4 screws and oneM5 screw.
Q For installation of the switchbox, refer to the "Removal ofSwitch Box" on page 5- 53 .
Q For re-wiring inside the switchbox, refer to the "Replacementof PC Board" on page 5- 72 .
Step Procedure Points
(S2652)
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Disassembly and Maintenance ESIEN05-04
5–72 Part 5 – Disassembly and Maintenance
1.12.13 Replacement of PC Board
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Removing the PC Board1 Remove the switch box
cover.(M4 screw×2)
2 Disconnect theconnectors shown in theright connected to the PCboard.
Cut the tie wrap fixing thelow tension cable (blue)to the switch box.
3 Press two clawssupporting the PC boardto disengage one side of
the PCB, then tilt theboard and disconnect thelead wire for swing flap.(X36A)
Air temperature thermistor : X19AHigh tension cable of transformer : X11ALow tension cable of transformer : X10AOutdoor unit connection wire : X27AFan motor lead wire : X20ALead wire of remote controller : X5ALead wire of drain pump : X25A
Lead wire of liquid pipe thermistor : X18ALead wire of swing motor : X36A (Refer to the item 3 below.)Lead wire of thermistor for heating : X17ALead wire of float switch : X15A
Lead wire ofremote controller
Tie wrap ClawClaw Low-voltage cable
of transformer
Connector for
fan motor
High-voltagecable oftransformer
Cut this tie wrap
Cut this tie wrapAir temperature thermistor
To the swingflap motor
Outdoor unitconnection wireand earth wire
Outdoor unitconnectionwire terminal
P 1 P 2 F1 F2 X17A X36A X18AX25A
X20A
X27AX11AX10AX19A
X15A
X5A
(S2687)
Claw
(S2688)
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5
1
5
2 Installing the PC board andre-wiring inside the switchbox
1 Engage the PC boardwith two claws shown inthe right figure, push upthe board until a clicksound is generated, thenconnect the lead wiresshown right.
2 Next connect the leadwires in the route shownbelow and fix them withtie wrap in the followingorder.c Connect the fan
motor lead wire to theconnector X20A.
d Connect the lead wireof capacitor for fanmotor to thecapacitor.
e Insert the lead wire ofdrain pump to theconnector X25A.
f Connect the lead wireof float switch toX15A through the
specified path andwire clamp 1.
g Insert two thermistorsto the connectormatching the colorwith X17A and X18Athrough the wireclamp 1(e.g. connect the wirewith yellow tape to theyellow connector).
Connect the lead wire offloat switch and twopieces of wire ofthermistor to the switchbox by using tie wrap h .
(Use tie wrap properly toprevent the wire fromcontact with hot part ofthe PC board.)Insert the rubber bushingof air temperaturethermistor i into the slitof switch box.Then, check that it is
connected to theconnector X19A.
Step Procedure Points
P1P2F1F2
X10A
X36A
X5A X11A X27A
Hooking claws for mounting PC board (Three locations)
Fixing claws for the PC board with pushing force upward(Two locations)
(S2689)
Lead wire of swing motor :X36AHigh roltage cable of transformer :X11ALow roltage cable of transformer :X10AOutdoor unit connection wire :X27AWire of remote controller :X5A
(S2690)
∗ Be careful that the lead wire does not lay off the groove.
To drain pump
Tofloat switch
e Drain pump connector
h Tie wrap
g Heat exchangerthermistor connectorsX17A, X18A
d Lead wire ofcapacitor forfan motor
i Rubber bushing forair temp. thermistor
f Connector X15Afor float switch
j Tie wrap for low-tensioncable of transformer c Fan motor lead wire X20A
To heatexchangerthermistor
Wire clamp
Slack wire hereif the wire isexcessively long.
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Disassembly and Maintenance ESIEN05-04
5–74 Part 5 – Disassembly and Maintenance
3 Re-connect the outdoorunit connection wire, theearth wire and wire ofremote control as they
were, and fix themsecurely with tie wrap.(Only when install theswitch box)
Q Be sure to fix the lead wire tobe connected to the connectorX10A for low-tension cable oftransformer to the switch box
with tie wrap j .(The tie wrap is used forpreventing the wire fromcontact with a hot part on thePC board.)
3 Installing the decorationpanel
1 Put the two holes on thedecoration panel to thepanel mounting screwsand slide the panel, turn
the stoppers to preventthe panel from fallingdown, then install theremainder two screws.
Q When installing the decorationpanel, be careful not to catchthe lead wire.
Step Procedure Points
Powertransformer
Tie wrap
Terminal of outdoor unit
connection wire
Outdoor unit connectionwire and earth wire
(S2691)
PCboard
(S2692) (S2693)
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2 Insert the lead wires ofswing flap to theconnector on the PCboard.
3 Install the cover of switchbox and the grille.
Step Procedure Points
(S2637)
(S2636)
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5–76 Part 5 – Disassembly and Maintenance
1.12.14 Replacement of Receiver Section of infrared remote control
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Removing the receiversection
1 Remove two screws ofthe transmission partsbox to remove the box.
2 Cut the tie wrap fixingtransmission parts boxand harness anddisconnect the connectorX1A.
3 Disconnect the lead wireof the transmission partsbox from the connectorX24A on the indoor unitPC board.
X24
Transmission parts box
(S2695)
(S2694)
Tie wrap
X 2 A
X 1 A
(S2696)
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5
4 Removing the decorationpanel
Q Refer to "Removal ofDecoration Panel"
5 Pull out the lead wire ofreceiver section fromwiring groove.
6 Push three claws on therear side of panel toremove the corner cover(receiver section).
2 Installing the receiversection
1 Pass through the leadwire of the receiversection, and insert thecorner cover.
2 Put the wire in the wiringgroove on the hookingpiece securely.
Step Procedure Points
Decoration panel
Push three claws to removethe corner cover.
Lead wire of receiver section
(S2697)
(S2698)
(S2699)
(S2700)
Hooking piece(S2701)
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3 Install the switch box andthe decoration panel.
Q When install the decorationpanel,be careful not to catch the leadwire.
4 Insert the lead wire of thereceiver section toconnector X1A, and bindthe two wires with tiewrap.
5 Set the dip switches. Q Setting the dip switches
Set the dip switches with sameconditions as those of thetransmission parts boxremoved.(For details of setting, refer tothe instruction manual ofinfrared remote control kit.)
6 Mount the transmissionparts box with two screws
after checking that the tiewrap is in the fixingposition and the lead wireis caught with fixing partof tie wrap and can notcome out.
7 Insert the lead wire fromthe transmission partsbox to the connectorX24A on indoor unit.
Pass through the leadwire to be connected toX24A on the indoor unitPC board under thehooking piece.
Step Procedure Points
Tie wrap
X 2 A
X 1 A
(S2696)
(S2694)
1 2 3 M S
S S 2 S S 1
(S2702)
X24
(S2703)
Hooking piece
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5
1
5
1.13 FHQ35, 50, 60, 71, 100, 125B
Overview This part contains the following topics:
Topic See page
Removal of Air Filter and Suction Grille 5–80
Removal of Electrical Parts and PC Boards 5–82
Removal of Horizontal Blade 5–85
Removal of Fan Rotor and Fan Motor 5–86
Removal of Fan Bearing 5–89
Removal of Bottom Panel and Drain Pan 5–91
Removal of Swing Motor 5–93
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5–80 Part 5 – Disassembly and Maintenance
1.13.1 Removal of Air Filter and Suction Grille
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Push the 2 tabs andopen the suction grilles.
2 Push the air filterinstallation panel from 2places in the direction ofthe arrow, and pull the airfilter out toward yourself.
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3 Grip the suction gril lehinge strongly andremove the suction grille.
Step Procedure Points
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1.13.2 Removal of Electrical Parts and PC Boards
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:.
Step Procedure Points
1 Loosen the 2 screws ofthe control box cover andremove the control boxcover.
2 Remove the 2 screws ofthe control box.
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6 Slide the PC board to theleft away from the tabson the right, and removethe PC board.
Step Procedure Points
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1.13.3 Removal of Horizontal Blade
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Gently bend the supportplate located at thecenter of the horizontalblade, and detach thecenter shaft.(Two shafts providedon Types 140 and160.)
2 Then gently bend thecenter of the horizontalblade, and take both theend shafts out of theirbearings.
Q When removing the horizontalblade from the bearings atboth ends, be careful not toget the blow port thermalinsulation scratched.
Reassembling precautions1 The shaft at the right end
of the horizontal blade iscut in D shape. Fit thisD-shaped end to theD-profiled bearing.Reattach the horizontalblade at the right side
first.
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1.13.4 Removal of Fan Rotor and Fan Motor
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Push the 2 tabs of the fanhousing toward theinside with your fingers,and pull out the fanhousing.
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2 Loosen the 2 hexagonset screws of theintermediate bearing.
3 Slide the intermediatebearing to the right andremove the fan rotorass’y.
Step Procedure Points
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4 Cut off the tie-wrap of theglass tube cover over thefan motor connector.Slide the glass tube and
get the connectorexposed.
Q A connectorsConnector (1) handles highvoltage (220-240 V), so besure to turn of the power
supply before disconnecting.
5 Disconnect the 2 fanmotor connectingconnectors.
6 Remove the 2 fan motorfasteners.
7 Remove the fan motor. Q Finally reconnect the fanmotor connector, cover it withthe glass tube and secure itwith the tie-wrap.
Step Procedure Points
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1.13.5 Removal of Fan Bearing
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
Q Remove the fan rotoraccording to the proceduresfor removing the fan rotor andfan motor.
1 Remove the left sidepanel installation screw.
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2 Slide the left side paneltoward the front of theunit and remove.
3 Remove the 2 bearinginstallation screws andremove the bearing.
Step Procedure Points
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1.13.6 Removal of Bottom Panel and Drain Pan
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Remove the 7 bottompanel installation screws(2 each on the left andright, 3 in the rear), andremove the bottompanel.
Remove the rear surface screws(2 each on the left and right), and
remove the center screw whilesupporting the bottom panel fromunderneath.
2 Let down the rear of thebottom panel, push outtoward the front(removed from thehooking part) andremove.
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3 Remove the drain panretainer (2 screw).
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1.13.7 Removal of Swing Motor
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Remove the screw fromthe right side panel. Slidethe right side paneltoward the front anddetach it.
2 Cut off the tie-wrap of theswing motor connector.
3 Disconnect theconnector from the swingmotor connector.
4 Remove the screw fromthe swing motor. Theswing motor has twoprojections on it. Lowerthe swing motor and takeit out.
Q When reassembling, fit thehorizontal blade shaft end tothe D-profiled bearing.Apply the tie-wrap to theconnectors to secure them inplace.
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5–94 Part 5 – Disassembly and Maintenance
1.14 FUQ71, 100, 125B
Overview This part contains the following topics:
Topic See page
Removal of Air Filter 5–95
Removal of Suction Grille 5–96
Removal of Fan 5–98
Removal of Fan Motor 5–100
Removal of Drain Pan 5–102
Removal of Drain Pump 5–105
Removal of Swing Motor 5–107
Removal of Air Flow Control Blade 5–109
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1.14.1 Removal of Air Filter
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Opening suction grille
Push two tabs on suctiongrille toward the center ofgrille at the same time.
2 Pull down suction grille.(Two strings areequipped to prevent thegrille from dropping.)
3 To remove air filter, liftthe tabs up at the sametime and pull it forward.
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1.14.2 Removal of Suction Grille
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Unhook twodrop-prevention stringswhile supporting suctiongrille with hand.
2 Open suction grilleforward for approx. 45degree.
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3 Disengage three hookslocated at rear side of thegrille to remove suctiongrille.
Step Procedure Points
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1.14.3 Removal of Fan
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Remove two mountingscrews to dismountswitch box cover.
2 Remove suction airtemperature thermistorattached to bell mouth.
3 Bell mouth is mountedwith tree screws.
Loosen a screw locatedat diagonal position tothe pipings and removeother two screws.
Edge of rib
Stick filamenttape Edge of
clamp
(S1271)
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5–100 Part 5 – Disassembly and Maintenance
1.14.4 Removal of Fan Motor
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Removing fan motor
a. Disconnect connector.
b. Remove lead wireretaining plate.
Caution:
Fan motor can be removedwithout removing the lead wireretaining plate.However, when washing the heatexchanger, this plate should beremoved and protect the leadwires.
2 Remove screws formounting fan motor.
Q FUQ71BUV1B:Three screws
Q FUQ100/125BUV1B:Four screws
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3 Remove motor by pullingdown.
Step Procedure Points
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5–102 Part 5 – Disassembly and Maintenance
1.14.5 Removal of Drain Pan
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:Step Procedure PointsQ Remove suction grille
according to the Removal ofair filter and that of suctiongrille.
1 To dismount three cornersections A, B and C,remove a flocked screw.
2 Remove three flockedscrews to dismountcorner section D.
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3 Disconnect wires andconnectors from PCB.
4 Arrange wire harness toavoid interference withnext process.
Caution:
This work should be done by twopersonnel.If drain water remain in the pan, itmay drop and stain on the floor.Make sure to check if no drainwater remain in the pan, or coverthe floor with vinyl sheet before
disassembling work.
5 To dismount drain panblocking plate, removeeach two mountingscrews located at fourcorners.
Step Procedure Points
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6 Remove drain pan bypulling it down.
Step Procedure Points
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1.14.6 Removal of Drain Pump
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Drain pump is located atpiping side.
Cut clamp material ofhose, and disconnecthose from pump.
Caution:
When reconnect drain hose withthe pump, secure hose at jointusing clamping material such asTielap. (Clamping material shouldbe normally included in the stockitems.)
2 Remove four screws todismount drain pump.
3 Dismount drain pump bypulling it down.
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4 Removing float switch
a. Loosen threemounting screws to
remove drain pumpmounting base.
b. Remove two screwslocated at opposite sideof drain pump mountingbase to dismount floatswitch.
Step Procedure Points
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1.14.7 Removal of Swing Motor
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
Q Remove suction grilleaccording to "Removal ofSuction Grille"
1 Swing motor is located atthe diagonal position ofpiping.
2 Remove two mountingscrews for swing motorcover.
3 Remove swing motorcover by holding two tabson the cover.
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4 Remove two screws todismount swing motor.
Step Procedure Points
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1.14.8 Removal of Air Flow Control Blade
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 To remove horizontalblade, press down tabslocated at both end ofblade and pull themforward.
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2 Remove horizontalblade.
Step Procedure Points
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1.15 FAQ71B
Overview This part contains the following topics:
Topic See page
Removal of Air Filter and Front Panel 5–112
Removal of Front Grille 5–112
Removal of the horizontal blade and vertical blade 5–115
Removal of Electrical Box 5–117
Removal of Heat Exchanger 5–118
Removal of Fan Motor and Fan Rotor 5–119
Removal of Air Swing Motor 5–120
Drain Hose Piping to the Left 5–121
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1.15.1 Removal of Air Filter and Front Panel
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Put your fingers onprotrusions at left andright side of the unit toopen the front panel.
2 To remove the air filter,push up the tab and pulldown the filter.
Q The air filter is free from theside of left or right.
Q It is easy to install if insertingalong the guide.
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3 Disengage the holdingsection on upper right ofthe panel by pushingtoward left, then slide
toward right to removethe front panel.
Step Procedure Points
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1.15.2 Removal of Front Grille
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
Q Removing the front panel inaccordance with "Removalof Front Panel".
1 Remove three pieces offront grille fixing screws.
2 Remove the front grille bypulling forward whilepushing three hookslocated at upper part ofthe grille one by one.
Q If hard to remove, try to pushthe hooks by a screwdriver orthe like to remove.
3 The front grille can be
removed by pullingforward and lift thebottom part.
Q Make sure that the three
hooks are set on the originalposition when reinstalling thefront grille.
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1.15.3 Removal of the horizontal blade and vertical blade
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Removing the horizontalblade.
1 Open the horizontalblade.
2 Bend the horizontal bladeslightly to disengage thefixing part at right side.
3 Pull the horizontal bladerightward and take it out.
Horizontal blade
Holder
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Disassembly and Maintenance ESIEN05-04
5–116 Part 5 – Disassembly and Maintenance
2 Removing the vertical blade.1 Disengage the protrusion
on upper side of bladefrom holder plate. (Threelocations)
2 Push the vertical bladebackward and pull thelower side forward todisengage the blade fromthree hooks.
Step Procedure Points
Holder plate
Protrusion
Holder plate
Vertical blade
Hook
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–117
3
5
1
5
1.15.4 Removal of Electrical Box
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
Q Removing the front grille inaccordance with "Removalof Front Grille" .
1 Remove the screw on theservice cover.
2 Remove the screw on thedrip proof plate.
3 Remove the screw for thegrounding wire.
4 Remove the followingconnectors.
Q Fan motor connector
Q Air swing motorconnector
5 Pull the heat exchangerthermistor and dismantleit.
6 Remove the fixing screwfor switch box.
7 Pull forward the switchbox holding lower part ofthe box.
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Disassembly and Maintenance ESIEN05-04
5–118 Part 5 – Disassembly and Maintenance
1.15.5 Removal of Heat Exchanger
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
Q Removing the front grille inaccordance with "Removalof Front Grille" .Removing the switch box inaccordance with "Removalof Electrical Box" .
Caution:
If gas leaks, repair the leakagesection, collect refrigerant insidethe unit completely, then,recharge refrigerant afterperforming vacuum dehydration.
Caution:
Don't mix air or the like other thanthe specified refrigerant into arefrigeration circle.
(Mixing of air or other gas causesabnormal high pressure in therefrigerating cycle and results inpipe rupture or personal injuries.)
Q Pay attention not to soil thefloor with residual drain.
Q In case that the drain hose isburied inside wall, remove theheat exchanger after pullingout the drain hose.
Caution:
When removing or reinstalling theheat exchanger, be sure to weargloves or wrap the heatexchanger with cloth or the like.(Otherwise, the fins may injureyour hand.)
1 Press strongly the clawson both left and rightsides of heat exchangertoward inside.
2 To remove the heat
exchanger, pull it upward.
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–119
3
5
1
5
1.15.6 Removal of Fan Motor and Fan Rotor
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
Q Removing the front grille inaccordance with "Removalof Front Grille" .Removing the electrical boxin accordance with"Removal of Electrical Box" .
1 Removing the fan motor1 Insert a Phillips tip
screwdriver into the air
outlet and remove thescrews fixing the fanmotor and fan rotor. (Thescrews can be removedwithout removing ofhorizontal blade.)
2 Remove the two screwson the bearing cover (1)and (2) and dismantle thecovers.
3 Take out the fan motorsideways.
2 Removing the fan rotorQ Removing the heat
exchanger in accordancewith "Removal of HeatExchanger" .
1 Remove the two screwsto dismantle the rotorcover.
2 Pull the fan rotor out.
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Disassembly and Maintenance ESIEN05-04
5–120 Part 5 – Disassembly and Maintenance
1.15.7 Removal of Air Swing Motor
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
Q Removing the front grille inaccordance with "Removalof Front Grille" .
1 Disconnect the air swingmotor connector in theelectrical box.
2 Remove the screw whichfixes the air swing motor.
3 Pull the air swing linkassembly to the leftstrongly to dismantle.
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–121
3
5
1
5
1.15.8 Drain Hose Piping to the Left
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
Q Removing the front grille inaccordance with "Removalof Front Grille" .
Q The drain pan and bottomframe are designed as anintegral-type.
Q Insert the drain hose to thehose plug securely as far as itwill go.
1 Pull out the drain hoseattached on the rear rightof the unit.
2 Pull out the drain plugand drain socketattached on the rear leftof the unit.
3 Piping of Drain Hose atLeft Side.
4 Insert the drain plug anddrain socket into the rightside of the unit withhexagonal pin wrench.
Q Insert the drain plug andsocket securely as far as it willgo.
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Disassembly and Maintenance ESIEN05-04
5–122 Part 5 – Disassembly and Maintenance
1.16 FAQ100B
Overview This part contains the following topics:
Topic See page
Removal of Air Filter 5–123
Removal of Slide Panel, Operation Display Cover, and Front Grille 5–124
Removal of Electrical Parts Box 5–125
Removal of PC Board 5–126
Removal of Swing Louvre Unit 5–127
Removal of Fan Motor 5–129
Removal of Drain Pan 5–130
Removal of Heat Exchanger 5–132
Removal of Fan Rotor 5–133
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–123
3
5
1
5
1.16.1 Removal of Air Filter
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Hold the air filter tabswith your hands and pullout.
2 Pull the air fil ter out.
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Disassembly and Maintenance ESIEN05-04
5–124 Part 5 – Disassembly and Maintenance
1.16.2 Removal of Slide Panel, Operation Display Cover, and Front Grille
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
1 Remove the left and rightside panels. (1 whitescrew each on left andright)
The wiring diagram is applied tothe right side panel, andtroubleshooting list is applied tothe left side panel.
2 Remove the operation
display cover installationscrew and remove thecover by sliding to theright.
3 Remove the front grilleinstallation screws (3
M4X l12 screws withspacers)
4 Disconnect the upperhook of the front grilleand remove.
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–125
3
5
1
5
1.16.3 Removal of Electrical Parts Box
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
Q Remove the left and right sidepanels, operation displaycover and front grilleaccording to the proceduresfor their removal.
The left and right side panelshave to be taken off in order toremove the front grille.
1 Remove the(1) thermistor,(2) heater connectorand(3) rubber clipconnected to the PCboard.
2 Remove the 2 screwsfastening the electricalparts box to the units.
3 Lift the electrical partsbox and remove bymoving toward the right.
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Disassembly and Maintenance ESIEN05-04
5–126 Part 5 – Disassembly and Maintenance
1.16.4 Removal of PC Board
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:Step Procedure PointsQ Remove the outer panels
according to the procedurefor "Removal of ElectricalParts Box" .
1 Disconnect the front sidewiring connectorconnected to the PCboard.
2 Disconnect the PC boardfrom the tabs by pushingit inward. Draw the PCboard out partly anddisconnect the remainingconnectors.
The tape holding the electricalparts box and PC board is fortransport, and is unnecessarywhen reinstalling.
3 Completely remove thePC board.
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–127
3
5
1
5
1.16.5 Removal of Swing Louvre Unit
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
Q Remove the electrical partsbox according to "Removal ofElectrical Parts Box" .
1 Remove the horizontalblade.
2 Remove the swingLouvre unit. (3 screws)
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Disassembly and Maintenance ESIEN05-04
5–128 Part 5 – Disassembly and Maintenance
3 Remove the swing motorfrom the swing Louvreunit.
You can replace the swing motorwithout removing the swingLouvre unit.
Step Procedure Points
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–129
3
5
1
5
1.16.6 Removal of Fan Motor
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
Q Remove side panels andother external casing, andelectrical parts box accordingto their removal procedures.
Use 2.5 mm hexagon nut driver.
1 Loosen the hexagon setscrew fastening the fanrotor and fan motor.
2 Remove the fan motorfastener. (3 screws)
3 Remove the fan motor.
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Disassembly and Maintenance ESIEN05-04
5–130 Part 5 – Disassembly and Maintenance
1.16.7 Removal of Drain Pan
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:Step Procedure PointsQ If removing the drain pan:
Carry out pump down,disconnect the transmissionpiping and wiring, andremove the main unit.
The bottom panel is fastened tothe unit installation plate by 3screws.
Q Remove side panels,operation display cover andfront cover according totheir removal procedures.
1 Remove the bottompanel.
2 Remove the air dischargesection.
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–131
3
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5
3 Remove the air dischargeunit.(7 screws)
Center of air discharge sectionalso screw fastened.
4 Remove the drain pan. 1 Pull left side toward yourself.
2 Move the drain hose to theright until it comes off.
Step Procedure Points
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Disassembly and Maintenance ESIEN05-04
5–132 Part 5 – Disassembly and Maintenance
1.16.8 Removal of Heat Exchanger
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
Q Before dismounting a heatexchanger, make sure toproceed pump downrefrigerant to outdoor unit anddisconnect the connectionpipe and wiring, then removethe indoor unit.
1 Dismount top plate
2 Remove the 3 settingscrews for heatexchanger and onescrew for pipe fixing box.
There is a hock right hand sidebehind the heat exchanger.
Top plate
(S1325)
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ESIEN05-04 Disassembly and Maintenance
Part 5 – Disassembly and Maintenance 5–133
3
5
1
5
1.16.9 Removal of Fan Rotor
Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure:
Step Procedure Points
Q Remove the heat exchangeraccording to "Removal ofHeat Exchanger" .
You can also remove the auxiliaryelectric heater without removingthe heat exchanger.
1 Remove the 2 screws ofthe left side panel.
2 Remove the fan rotor bysliding to the left andpulling out towardyourself.
Reference:If you have enough space to pullthe fan rotor out from the left side,you can remove it withoutdismounting the heat exchanger.
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Disassembly and Maintenance ESIEN05-04
5–134 Part 5 – Disassembly and Maintenance
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ESIEN05-04
Index i
3
4
5
1Index
Symbols"88" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–17
AA1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–32A3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–33A6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–36AF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–35Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–44 , 5–80 , 5–95 , 5–112 , 5–123AJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–38Automatic restart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–10
BBottom Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–91
CC4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–40
C5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–40C9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–40CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–43Ceiling height. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–15Centralized Address Setting Error. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–52Centralized group No. Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–19Changing
Field settings, wired remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–11Field settings, infrared remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–12Maintenance mode settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–21
CheckingClogged points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–60Fan motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–61PCB’s Hall IC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–54Power supply wave form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3 –55Test run checks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–4Thermistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–56
CJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–42Combination overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k i–iiComponents
Exploded views, indoor units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–3Functional diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 1–55PCB layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 1–107Switch box layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 1–95Wired remote control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–10infrared remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–12Wiring diagrams, indoor units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 1–61
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ESIEN05-04
ii Index
ControlCondensation avoidance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–19 , 2–20 , 2–21
Draft avoidance control 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–20Draft avoidance control 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–21Drain pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–17Indoor unit fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–23PMV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–15Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–16
Correlation of Air-Conditioner’s Operation Status and Pressure / Running Current . . . . . . . . . . . . . . . k 4–26
DDecoration Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–26 , 5–46Diameters, pipe connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 1–55Dimensions
Indoor units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 1–3
Draft avoidance control 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–21Drain Pan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–58 , 5–91 , 5–102 , 5–130Drain Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–59 , 5–61 , 5–105
EEEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–32Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 1–45Emergency operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–5Error codes
Indoor units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–31System malfunctions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–45
EvaluationAbnormal high pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–58Abnormal low pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–59
Exploded viewsIndoor units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–3
FFactory settings
Indoor units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–14Fan and flap operations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–22Fan Bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–89Fan Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–55 , 5–86 , 5–100 , 5–119 , 5–129Fan Rotor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–55 , 5–86 , 5–119 , 5–133FAQ100B
Removal of Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–123Removal of Drain Pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–130Removal of Electrical Parts Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–125Removal of Swing Louvre Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–127
FAQ100BUV1BRemoval of Fan Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–129Removal of Fan Rotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–133Removal of Heat Exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–132Removal of PC Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–126Removal of Slide Panel, Operation Display Cover, and Front Grille . . . . . . . . . . . . . . . . . . . . . k 5–124
FAQ71BDrain Hose Piping to the Left. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–121Removal of Air Filter and Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–112Removal of Air Swing Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–120Removal of Fan Motor and Fan Rotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–119Removal of Heat Exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–118
Removal of the horizontal blade and vertical blade. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–115FAQ71BUV1BRemoval of Electrical Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–117Removal of Front Grille . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–114
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Index iii
3
4
5
1FCQ71~140D
Removal of Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–24
Removal of Decoration Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–26Removal of Drain Pan, Drain Pump, Float Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–38Removal of Fan Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–36Removal of Heat Exchanger Temperature Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–41Removal of Horizontal Blade. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–28Removal of Humidity Sensor and Air Temperature Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–35Removal of PC Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–33Removal of Suction Grille . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–23Removal of Swing Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–29Removal of Switch Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–31
FFQ35~60BInstallation of drain pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–61Removal of air filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–44Removal of decoration panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–46Removal of drain pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–58
Removal of drain pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–59Removal of fan rotor and fan motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–55Removal of horizontal vane. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–49Removal of suction grille. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–43Removal of swing motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–51Removal of switch box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–53Replacement of heat exchanger thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–64Replacement of heat exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–66Replacement of PC board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–72Replacement of receiver of infrared remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–76
FHQ35~125BRemoval of air filter and suction grille . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–80Removal of bottom panel and drain pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–91Removal of electrical parts and pcb boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–82Removal of fan bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–89
Removal of fan rotor and fan motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–86Removal of horizontal blade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–85Removal of swing motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–93
Field settingsLevels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–20Overview indoor units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–13
Filter counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–16Forced operating mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–5Forced thermostat OFF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–13Freeze prevention function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–14Functional diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 1–55FUQ71~125B
Removal of Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–95Removal of Drain Pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–102Removal of Fan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–98
Removal of Swing Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–107FUQ71~125BU
Removal of Air Flow Control Blade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–109Removal of Drain Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–105Removal of Fan Motor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–100Removal of Suction Grille . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–96
HHeat Exchanger. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–66Horizontal Blade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–85Horizontal Vane. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–49
IIdentification function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–7
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ESIEN05-04
iv Index
LLocating
Exploded views, indoor units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–3Functional diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–55PCB layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–107Switch box layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–95Thermistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–4Wired remote control components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–10infrared remote control components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–12Wiring diagrams, indoor units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–61
MMalfunction Code and LED Display Table
Indoor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–28System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–29
Malfunction ofCapacity setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–38Drain system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–35Drain water level systemt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–33Field setting switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–50Indoor PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–32remote control air thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–42remote control air thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–43Transmission between indoor and outdoor unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–46Transmission between indoor unit and remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–48Transmission between MAIN and SUB remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–49
Motor lockIndoor unit fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–36
OOperation data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–24Outlook
Indoor units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3
PPCBs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–107Printed Circuit Board (PCB)
Indoor Unit PCB (FFQ-B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–72Indoor Unit PCB (FHQ-B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–82
RReceiver Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–76remote control
Multiple setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–8Setting address for receiver of infrared remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–5Setting address for infrared remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–6Thermostat, using conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–11
remote control Display Malfunction Code and Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–26Removal of Drain Pan, Drain Pump, Float Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–38Removal of Heat Exchanger Temperature Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–41Removal of PC Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–33Resistance conversion table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–57
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ESIEN05-04
Index v
3
4
5
1SSafety devices
Indoor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–30Self-Diagnosis by Wired remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–21Setting
Address for receiver of infrared remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–5Address for infrared remote control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–6Ceiling height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–15Centralized group No. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–19Field settings, wired remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–11Field settings, infrared remote control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–12Filter counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–16MAIN/SUB when using two remote controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–18
SettingsChanging maintenance mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–21Factory overview indoor units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–14
Feld overview indoor units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–13Maintenance mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–22Possible system settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–21
Simulated operation function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–8Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–45Standard Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–25Suction Grille . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–23, 5–43, 5–80, 5–96Swing Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–51, 5–93, 5–107, 5–120Switch box
Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–95Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–53
TTechnical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 1–45Test run
Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–4Thermistor
Indoor Heat Exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–64Thermistors
Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3 –56Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–4Locating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–4
Troubleshooting Based on Equipment ConditionCooling/Heating Operation Starts but Stops Immediately. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–10Equipment Discharges Dust.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–16Equipment Discharges White Mist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–14Equipment does not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–6Equipment Operates but does not Provide Heating.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–12
Equipment Produces Loud Noise or Shakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–15Indoor Fan Operates, but Compressor does not. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–8remote control LCD Displays "88". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–17Swing Flap does not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–18
Troubleshooting by LED Indication on the Indoor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–27Troubleshooting by remote control Display / LED Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–28
UU4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–46U5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–48U8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–49UA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–50UC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–52
UF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–46
7/28/2019 ESIEN05-04 - R-410A Sky Air Indoor_part2_tcm135-72767
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ESIEN05-04
vi Index
WWiring diagrams
Indoor units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 1–61
7/28/2019 ESIEN05-04 - R-410A Sky Air Indoor_part2_tcm135-72767
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