NO. 0285E

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

ROOM AIR CONDITIONERINDOOR UNIT + OUTDOOR UNIT

DECEMBER 2005 Refrigeration & Air-Conditioning Division

SERVICE MANUAL

PM

REFER TO THE FOUNDATION MANUALTECHNICAL INFORMATION

FOR SERVICE PERSONNEL ONLY

(W)

(A)

(kW)

(B.T.U./h)

(W)

(A)

(kW)

(B.T.U./h)

W

H

D

(kg)

(WALL TYPE)TYPE

MODEL

POWER SOURCE

TOTAL INPUT

TOTAL AMPERES

CAPACITY

TOTAL INPUT

TOTAL AMPERES

CAPACITY

DIMENSIONS(mm)

NET WEIGHT

SPECIFICATIONS

CONTENTS

SPECIFICATIONS ----------------------------------------------------- 5

HOW TO USE ---------------------------------------------------------- 6

CONSTRUCTION AND DIMENSIONAL DIAGRAM ------- 29

MAIN PARTS COMPONENT ------------------------------------- 31

WIRING DIAGRAM -------------------------------------------------- 33

CIRCUIT DIAGRAM ------------------------------------------------- 35

PRINTED WIRING BOARD LOCATION DIAGRAM ------- 37

BLOCK DIAGRAM --------------------------------------------------- 39

BASIC MODE --------------------------------------------------------- 41

REFRIGERATING CYCLE DIAGRAM ------------------------- 47

DESCRIPTION OF MAIN CIRCUIT OPERATION --------- 49

AUTO SWING FUNCTION---------------------------------------- 53

SERVICE CALL Q & A -------------------------------------------- 54

PARTS LIST AND DIAGRAM ------------------------------------ 63

RAS-08KH2 / RAC-08KH2RAS-10KH2 / RAC-10KH2RAS-14KH2 / RAC-14KH2

COOLING

HEATING

INDOOR UNIT

RAS-08KH2

780

280

205

9.0

After installation

RAS-08KH2RAS-10KH2RAS-14KH2

RAC-14KH2

RAC-08KH2RAC-10KH2

OUTDOOR UNIT

RAC-08KH2

INDOOR UNIT

RAS-10KH2

OUTDOOR UNIT

RAC-10KH2

INDOOR UNIT

RAS-14KH2

OUTDOOR UNIT

RAC-14KH2

700

570

210

32

750

570

280

38

780

280

205

9.0

700

570

210

32

780

280

205

9.0

1 PHASE, 50 Hz, 220-230-240V

590-610-630

2.80-2.80-2.80

2.10

7,170

490-510-530

2.30-2.30-2.30

2.20

7,510

1 PHASE, 50 Hz, 220-230-240V

890-900-950

4.20-4.10-4.10

2.90

9,900

740-770-810

3.50-3.50-3.50

3.00

10,240

1 PHASE, 50 Hz, 220-230-240V

1060-1090-1120

5.00-5.00-4.90

3.50

11,950

960-1000-1050

4.60-4.60-4.60

3.85

13,150

0285E (08/10/14KH2) cover 24/11/05, 10:20 AM1

– 1 –

SAFETY DURING REPAIR WORK

1. In order to disassemble and repairthe unit in question, be sure todisconnect the power cord plugfrom the power outlet before startingthe work.

2. If it is necessary to replace any parts, they should be replaced with respective genuine parts for the unit, andthe replacement must be effected in correct manner according to the instructions in the Service Manual ofthe unit.

If the contacts of electrical partsare defective, replace theelectrical parts without trying torepair them.

3. After completion of repairs, the initial stateshould be restored.

4. Lead wires should be connected and laid asin the initial state.

5. Modification of the unit by user himself shouldabsolutely be prohibited.

6. Tools and measuring instruments for use in repairs or inspection should be accurately calibrated in advance.

7. In installing the unit having been repaired, be careful to prevent the occurence of any accident such aselectrical shock, leak of current, or bodily injury due to the drop of any part.

8. To check the insulation of the unit, measure the insulation resistance between the power cord plug andgrounding terminal of the unit. The insulation resistance should be 1MΩ or more as measured by a 500V DCmegger.

9. The initial location of installation such as window, floor or the other should be checked for being and safeenough to support the repaired unit again.If it is found not so strong and safe, the unit should be installed at the initial location reinforced or at a newlocation.

10. Any inflammable thing should neverbe placed about the location ofinstallation.

11. Check the grounding to see whetherit is proper or not, and if it is foundimproper, connect the groundingterminal to the earth.

DANGER

First, I must disconnect

the power cord plug

from the power outlet.

0285E (08/10/14KH2) 1-5 24/11/05, 10:22 AM1

– 2 –

WORKING STANDARDS FOR PREVENTING BREAKAGE OF SEMICONDUCTORS

1. ScopeThe standards provide for items to be generally observed in carrying and handling semiconductors in relativemanufacturers during maintenance and handling thereof. (They apply the same to handling of abnormalgoods such as rejected goods being returned).

2. Object parts

(1) Micro computer(2) Integrated circuits (IC)(3) Field-effect transistors (FET)(4) P.C. boards or the like on which the parts mentioned in (1) and (2) of this paragraph are equipped.

3. Items to be observed in handling

(1) Use a conductive container for carrying and storing of parts. (Even rejected goods should be handled inthe same way).

Fig. 1. Conductive Container

(2) When any part is handled uncovered (in counting, packing and the like), the handling person must alwaysuse himself as a body earth. (Make yourself a body earth by passing one M ohm earth resistance througha ring or bracelet).

(3) Be careful not to touch the parts with your clothing when you hold a part even if a body earth is beingtaken.

(4) Be sure to place a part on a metal plate with grounding.

(5) Be careful not to fail to turn off power when you repair the printed circuit board. At the same time,try to repair the printed circuit board on a grounded metal plate.

1M

Fig. 2. Body Earth

Body earth(Elimik conductive band)

Clip for connection with agrounding wire

IC

A conductive polyvinyl bag IC

Conductive sponge

0285E (08/10/14KH2) 1-5 24/11/05, 10:22 AM2

– 3 –

(6) Use a three wire type soldering iron including a grounding wire.

Bare copper wire (for body earth)

Workingtable

Resistor of 1 M (1/2W)

Earth wire

Fig. 3. Grounding of the working table

Screw stop at the screwedpart using a rag plate

Soldering iron

Groundingwire

Fig. 4. Grounding a soldering iron

Use a high insulation mode (100V, 10M or higher) when ordinary iron is to be used.

(7) In checking circuits for maintenance, inspection or some others, be careful not to have the test probes of themeasuring instrument shortcircuit a load circuit or the like.

Metal plate (of aluminium, stainless steel, etc.)

Staple

0285E (08/10/14KH2) 1-5 24/11/05, 10:22 AM3

– 4 –

1. In quiet or stopping operation, slight flowing noise of refrigerant in the refrigerating cycle is heard occasionally,but this noise is not abnormal for the operation.

2. When it thunders near by, it is recommended to stop the operation and to disconnect the power cord plugfrom the power outlet for safety.

3. In the event of power failure, the airconditioner will restart automatically in the previously selected modeonce the power is restored. In the event of power failure during TIMER operation, the timer will be resetand the unit will begin or stop operating under a new timer setting.

4. If the room air conditioner is stopped by adjusting thermostat, or missoperation, and re-start in a moment,there is occasion that the cooling and heating operation does not start for 3 minutes, it is not abnormaland this is the result of the operation of IC delay circuit. This IC delay circuit ensures that there is nodanger of blowing fuse or damaging parts even if operation is restarted accidentally.

5. This room air conditioner should not be used at the cooling operation when the outside temperature isbelow 10°C (50°F).

6. This room air conditioner (the reverse cycle) should not be used when the outside temperature is below–10°C (14°F).If the reverse cycle is used under this condition, the outside heat exchanger is frosted and efficiency falls.

7. When the outside heat exchanger is frosted, the frost is melted by operating the hot gas system, it is nottrouble that at this time fan stops and the vapour may rise from the outside heat exchanger.

! CAUTION

0285E (08/10/14KH2) 1-5 24/11/05, 10:22 AM4

– 5 –

SPECIFICATIONS

MODEL

FAN MOTOR

FAN MOTOR CAPACITOR

FAN MOTOR PROTECTOR

COMPRESSOR

COMPRESSOR MOTOR CAPACITOR

OVERLOAD PROTECTOR

OVERHEAT PROTECTOR

FUSE (for MICROPROCESSOR)

POWER RELAY

POWER SWITCH

TEMPORARY SWITCH

SERVICE SWITCH

TRANSFORMER

VARISTOR

FUSE CAPACITY (TIME DELAY FUSE)

THERMOSTAT

REMOTE CONTROL SWITCH (LIQUID CRYSTAL)

RAS-08KH2RAS-10KH2RAS-14KH2

20 W

NO

NO

–

NO

NO

NO

3.15A

G4A

YES

YES

YES

NO

450NR

---------

YES(IC)

YES

---------

---------

20 W 30 W

1.5µF, 450 VAC 2.5µF, 450VAC

NO

20µF, 450 VAC 25µF, 450 VAC

YES

NO

NO

NO

NO

NO

NO

NO

NO

10 A 15 A

NO

NO

1050g

10m

UNIT

MAX. PIPES

REFRIGERANT CHARGINGVOLUME(Refrigerant 410A)

RAC-08KH2 RAC-14KH2RAC-10KH2

5RS080 5RS132

650g600g

5RS112

15m

WITHOUT REFRIGERANT BECAUSE COUPLING IS FLARE TYPE

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– 6 –

MODEL RAS-08KH2 / RAC-08KH2 and RAS-10KH2 / RAC-10KH2

Figure showing the installation of Indoor and Outdoor unit

The installation height of indoor unit must be 2.3m or more.

CAUTION

!

above 50mm

above 100mmab

ove

0.45

m

abov

e 30

0mm

mus

t not

ben

d

above 100mm

2,300mm or more

12

Max

imum

pip

e le

ngth

10m

Min

imum

pip

e le

ngth

5m

Plug

above 100mm

above 300mmabove 200mm

above 100mm

give clearanceas wide as possible

above 50mm wheninstalled on theceiling of balcony

above 200mm The difference in heightbetween the indoor andoutdoor unit should be keptmax 5m.

The connecting pipe, nomatter big or small, shouldall be insulated withinsulation pipe and thenwrapped with vinyl tape.(The insulator willdeteriorate if it is notwrapped with tape).

The connection of insulateddrain hose.

Please use insulated drainhose for the indoor piping(commercial product).

The indoor piping should beinsulated with the enclosedinsulation pipe. (If the insulatoris insufficient, please usecommersial products).

inner diameter ø 16mm

– 5a –

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– 7 –

MODEL RAS-14KH2 / RAC-14KH2

Figure showing the installation of Indoor and Outdoor unit

The installation height of indoor unit must be 2.3m or more.

CAUTION

!

above 50mm

above 100mm

abov

e 0.

45m

abov

e 30

0mm

mus

t not

ben

d

above 100mm

2,300mm or more

12

Max

imum

pip

e le

ngth

15m

Min

imum

pip

e le

ngth

5m

above 200mm

above 700mm

above 200mm

above 50mm wheninstalled on theceiling of balcony( )

above 100mm

above 100mm

give clearance aswide as possible

Plug

The difference in heightbetween the indoor andoutdoor unit should be keptmax 5m.

The connecting pipe, nomatter big or small, shouldall be insulated withinsulation pipe and thenwrapped with vinyl tape. (Theinsulator will deteriorate if itis not wrapped with tape).

The connection of insulateddrain hose.

Please use insulated drainhose for the indoor piping(commercial product).

The indoor piping should beinsulated with the enclosedinsulation pipe. (If the insulatoris insufficient, please usecommersial products).

inner diameter ø 16mm

– 5b –

0285E (08/10/14KH2) 1-5 24/11/05, 10:22 AM7

– 6 –

!

SAFETY PRECAUTION Please read the “Safety Precaution” carefully before operating the unit to ensure correct usage of the unit. Pay special attention to signs of “ Warning” and “ Caution”. The “Warning” section contains matters which,

if not observed strictly, may cause death or serious injury. The “Caution” section contains matters which mayresult in serious consequences if not observed properly. Please observe all instructions strictly to ensure safety.

The sign indicate the following meanings.

Please keep this manual after reading.

WARNING

PRECAUTIONS DURING INSTALLATION Do not reconstruct the unit.

Water leakage, fault, short circuit or fire may occur if you reconstructthe unit by yourself.

Please ask your sales agent or qualified technician for the installationof your unit. Water leakage, short circuit or fire may occur if you installthe unit by yourself.

Please use earth line.Do not place the earth line near water or gas pipes, lightning-conductor,or the earth line of telephone. Improper installation of earth line maycause electric shock.

A circuit breaker should be installed depending on the mounting site ofthe unit. Without a circuit breaker, the danger of electric shock exists.

Do not install the unit near a location where there is flammable gas.The outdoor unit may catch fire if flammable gas leaks around it.

Please ensure smooth flow of water when installing the drain hose.

CAUTION

!

!

PRECAUTIONS DURING SHIFTING OR MAINTENANCE

PRECAUTIONS DURING OPERATION

Avoid an extended period of direct air flow for your health.

WARNING

!

Should abnormal situation arises (like burning smell), please stop operating the unitand turn off the circuit breaker. Contact your agent. Fault, short circuit or fire mayoccur if you continue to operate the unit under abnormal situation.

Please contact your agent for maintenance. Improper self maintenance may causeelectric shock and fire.

Please contact your agent if you need to remove and reinstall the unit. Electricshock or fire may occur if you remove and reinstall the unit yourself improperly.

Do not insert a finger, a rod or other objects into the air outlet or inlet. As thefan is rotating at a high speed, it will cause injury. Before cleaning, be sureto stop the operation and turn the breaker OFF.

During thunder storm, disconnect and turn off the circuit breaker.

Do not use any conductor as fuse wire, this could cause fatal accident.

!

Make sure to connect earth line.

Indicates the instructions that must be followed.

The sign in the figure indicates prohibition.

WARNING

!

0285E (08/10/14KH2) 6-19 24/11/05, 10:23 AM6

– 7 –

PRECAUTIONS DURING OPERATION

Do not attempt to operate the unit with wet hands, this could cause fatalaccident.

When operating the unit with burning equipments, regularly ventilate theroom to avoid oxygen insufficiency.

Do not direct the cool air coming out from the air-conditioner panel to facehousehold heating apparatus as this may affect the working of apparatussuch as the electric kettle, oven etc.

Do not place plants directly under the air flow as it is bad for the plants.

Please ensure that outdoor mounting frame is always stable, firm andwithout defect. If not, the outdoor unit may collapse and cause danger.

Do not splash or direct water to the body of the unit when cleaning it as thismay cause short circuit.

When operating the unit with the door and windows opened, (the room humidity is always above80%) and with the air deflector facing down or moving automatically for a long period of time,water will condense on the air deflector and drips down occasionally. This will wet your furniture.Therefore, do not operate under such condition for a long time.

If the amount of heat in the room is above the cooling or heating capability of the unit (forexample: more people entering the room, using heating equipments and etc.), the preset roomtemperature cannot be achieved.

Do not climb on the outdoor unit or put objects on it.

Please switch off the unit and turn off the circuit breaker during cleaning, thehigh-speed fan inside the unit may cause danger.

Turn off the circuit breaker if the unit is not to be operated for a long period.

CAUTION

!

The product shall be operated under the manufacturer specification andnot for any other intended use.

Do not put water container (like vase) on the indoor unit to avoid waterdripping into the unit. Dripping water will damage the insulator inside the unitand causes short-circuit.

Do not use any aerosol or hair sprays near the indoor unit. This chemicalcan adhere on heat exchanger fin and blocked the evaporation water flowto drain pan. The water will drop on tangential fan and cause water splashingout from indoor unit.

0285E (08/10/14KH2) 6-19 24/11/05, 10:23 AM7

– 8 –

INDOOR UNIT

NAMES AND FUNCTIONS OF EACH PART

Air filterTo prevent dust from coming into the indoor unit.(Refer page 25)

Front panel

Indoor unit indicatorsLight indicator showing the operating condition.(Refer page 9)

Horizontal deflector Vertical deflector(Air Outlet)(Refer page 20)

Remote controllerSend out operation signal to the indoor unit. So as tooperate the whole unit.(Refer page 10)

OUTDOOR UNIT

Drain pipeCondensed water drain to outside.

Connecting cord and insulation pipe for piping

Air inlet (Back, Left side)

Air outlet

Drain pipeCondensed water drain to outside.

Connecting cord and insulation pipe for piping

Air inlet (Back and Left side)

Air outlet

WIDTH (mm)

780

700

750

MODEL

RAS-08KH2/10KH2/14KH2

RAC-08KH2/10KH2

RAC-14KH2

HEIGHT (mm)

280

570

570

DEPTH (mm)

205

210

280

MODEL NAME AND DIMENSIONS

CAUTION• When heating operation, drain or defrosted water flows

out from outdoor unit. Don’t close drain outlet portion in chilly area so as not to freeze these.

!

RAC-08KH2RAC-10KH2

RAC-14KH2

0285E (08/10/14KH2) 6-19 24/11/05, 10:23 AM8

– 9 –

INDOOR UNIT INDICATORS

TEMPORARY SWITCH

Use this switch to start and stop when the remote controller does not work. [Use non-conductor stick(example toothpick)]

By pressing the temporary switch, the operation is done in previously set operation mode.

When the operation is done using the temporary switch after the power source is turned off and turn onagain, the operation is done in automatic mode.

OPERATION INDICATOR

FILTER LAMPWhen the device is operated for a total of about 100hours, the FILTER lamp lights to indicate that it is timeto clean the filter. The lamp goes out when the POWERSWITCH set to OFF and ON again.

OPERATION LAMPThis lamp lights during operation.The OPERATION LAMP flashes in the following casesduring heating.(1) During preheating

For about 2–3 minutes after starting up.(2) During defrosting

Defrosting will be performed about once every onehour when frost forms on the heat exchanger of theoutdoor unit, for 5–10 minutes each time.

TIMER LAMPThis lamp lights when the timer is working.

TEMPORARYSWITCH

TEMPORARYSWITCH

Press

Temporary Switch

Non-conductor Stick

0285E (08/10/14KH2) 6-19 24/11/05, 10:23 AM9

– 10 –

AUTO

HEAT

DEHUMIDIFY

COOL

FAN

FAN SPEEDLOWMEDHI

SLEEPING

STOP (CANCEL)

START (RESERVE)

START/STOP

TIME

TIMER SET

TIMER SELECTOR ON TIMER OFF TIMER

AUTO SWING

˚CH

RESET

˚CH

NAMES AND FUNCTIONS OF REMOTE CONTROL UNIT

REMOTE CONTROLLER This controls the operation of the indoor unit. The range of control is about 7 meters. If indoor lighting is

controlled electronically, the range of control may be shorter.This unit can be fixed on a wall using the fixture provided. Before fixing it, make sure the indoor unit canbe controlled from the remote controller.

Handle the remote controller with care. Dropping it or getting it wet may compromise its signal transmissioncapability.

After new batteries are inserted into the remote controller, the unit will initially require approximately 10seconds to respond to commands and operate.

Signal emitting window/transmission signPoint this window toward the indoor unit when controlling it.The transmission sign blinks when a signal is sent.

DisplayThis indicates the room temperature selected, current time, timer status, functionand intensity of circulation selected.

START/STOP buttonPress this button to start operation. Press it again to stop operation.

SLEEP buttonUse this button to set the sleep timer.

TEMPERATURE buttonsUse these buttons to raise or lower the temperature setting. (Keep pressed, andthe value will change more quickly.)

TIME buttonUse this button to set and check the time and date.

RESET buttons FUNCTION selector

Use this button to select the operating mode. Every time you press it,the mode will change from (AUTO) to (HEAT) to (DEHUMIDIFY) to

(COOL) and to (FAN) cyclically. FAN SPEED selector

This determines the fan speed. Every time you press this button, the intensityof circulation will change from (AUTO) to (HI) to (MED) to (LOW)(during the (FAN) mode, from HI to MED to LOW).

AUTO SWING buttonControls the angle of the horizontal air deflector.

TIMER controlUse this button to set the timer.

OFF-TIMER button Select the turn OFF time. ON-TIMER button Select the turn ON time. RESERVE button Time setting reservation. CANCEL button Cancel time reservation.

Precautions for Use Do not put the remote controller in the following places.

Under direct sunlight. In the vicinity of a heater.

Handle the remote controller carefully. Do not drop it on the floor,and protect it from water.

Once the outdoor unit stops, it will not restart for about 3 minutes(unless you turn the power switch off and on or unplug the powercord and plug it in again).This is to protect the device and does not indicate a failure.

If you press the FUNCTION selector button during operation, thedevice may stop for about 3 minutes for protection.

0285E (08/10/14KH2) 6-19 24/11/05, 10:23 AM10

– 11 –

AUTOMATIC OPERATION

The device will automatically determine the mode of operation, HEAT, COOL or DEHUMIDIFY depending onthe initial room temperature. The selected mode of operation will not change when the room temperaturevaries.

As the settings are stored in memory in the remote controller, you only haveto press the (START/STOP) button next time.

Press the FUNCTION selector so that the display indicates the (AUTO)mode of operation.

When AUTO has been selected, the device will automatically determinethe mode of operation, HEAT, COOL or DEHUMIDIFY depending onthe initial room temperature.

Press the (START/STOP) button.Operation starts with a beep.Press the button again to stop operation.

You can raise or lower the temperature setting as necessary by maximum of3°C.

Press the temperature button and the temperature settingwill change by 1°C each time.

The preset temperature and the actual room temperature may varysomewhat depending on conditions.

The display does not indicate the preset temperature in the AUTO mode.If you change the setting, the indoor unit will produce a beep.

1

STARTSTOP

°C

RESET

Over 27°C COOL

23~27°C

Under 23°C HEAT

Temperature settingFunction

27°C

23°C

Slightly lower than theroom temperature LOW

FAN SPEED

HI at start, MED or LOWafter the preset temperatureis reached

HI at start, MED or LOWafter the preset temperatureis reached

--

DEHUMIDIFY

-

Initial room temperature(approx.)

Condition of Automatic Operation

0285E (08/10/14KH2) 6-19 24/11/05, 10:24 AM11

– 12 –

HEATING OPERATION

Use the device for heating when the outdoor temperature is under 21°C.When it is too warm (over 24°C), the heating function may not work in order to protect the device.

In order to keep reliability of the device, please use this device above –10°C of the outdoor temperature.

Press the FUNCTION selector so that the display indicates (HEAT).

Set the desired FAN SPEED with the (FAN SPEED) button(the display indicates the setting).

(AUTO): The fan speed is HI at first and varies to MEDor LOW automatically when the presettemperature has been reached.

(HI) : Economical as the room will become warmquickly.But you may feel a chill at the beginning.

(MED) : Quiet.

(LOW) : More quiet.

Set the desired room temperature with the TEMPERATUREbuttons (the display indicates the setting).

The range of 18-22°C is recommended as theroom temperature for heating.If the temperature setting is 20°C, the roomtemperature will be controlled at around 20°C.

The temperature setting and the actual room temperature mayvary somewhat depending on conditions.

Press the (START/STOP) button. Heating operation startswith a beep. Press the button again to stop operation.

As the settings are stored in memory in the remote controller, you onlyhave to press the (START/STOP) button next time.

1

2

3

STARTSTOP

˚C

RESET

˚C

0285E (08/10/14KH2) 6-19 24/11/05, 10:24 AM12

– 13 –

RESET

˚C

˚C

DEHUMIDIFYING OPERATION

Use the device for dehumidifying when the room temperature is over 16°C.When it is under 15°C, the dehumidifying function will not work.

Dehumidifying Function

When the room temperature is higher than the temperature setting: The device will dehumidify the room,reducing the room temperature to the preset level.When the room temperature is lower than the temperature setting: Dehumidifying will be performed atthe temperature setting slightly lower than the current room temperature, regardless of the temperaturesetting. The function will stop (the indoor unit will stop emitting air) as soon as the room temperaturebecomes lower than the setting temperature.

Set the desired room temperature with the TEMPERATUREbutton (the display indicates the setting).

The range of 20-26˚C is recommended asthe room temperature for dehumidifying.

Press the (START/STOP) button. Dehumidifying operationstarts with a beep. Press the button again to stop operation.

2

As the settings are stored in memory in the remote controller, youonly have to press the (START/STOP) button next time.

STARTSTOP

Press the FUNCTION selector so that the display indicates(DEHUMIDIFY).

The FAN SPEED is set at LOW automatically.The FAN SPEED button does not work.

1

0285E (08/10/14KH2) 6-19 24/11/05, 10:24 AM13

– 14 –

˚C

RESET

˚C

COOLING OPERATION

Use the device for cooling when the outdoor temperature is 22-42°C.If indoor humidity is very high (over 80%), some dew may form on the air outlet grille of the indoor unit.

Press the FUNCTION selector so that the display indicates (COOL).

Set the desired FAN SPEED with the (FAN SPEED) button(the display indicates the setting).

(AUTO): The FAN SPEED is HI at first and varies toMED or LOW automatically when the presettemperature has been reached.

(HI) : Economical as the room will become coolquickly.

(MED) : Quiet.

(LOW) : More quiet.

Set the desired room temperature with the TEMPERATUREbutton (the display indicates the setting).

The range of 25-28°C is recommended as theroom temperature for cooling.If the temperature setting is 27°C, the roomtemperature will be controlled at around 27°C.

The temperature setting and the actual room temperature mayvary some how depending on conditions.

Press the (START/STOP) button. Cooling operation startswith a beep. Press the button again to stop operation. Thecooling function does not start if the temperature setting ishigher than the current room temperature (even though the (OPERATION) lamp lights). The cooling function will start assoon as you set the temperature below the current roomtemperature.

As the settings are stored in memory in the remote controller, youonly have to press the (START/STOP) button next time.

1

2

3

STARTSTOP

0285E (08/10/14KH2) 6-19 24/11/05, 10:24 AM14

– 15 –

FAN SPEED (AUTO) ..... When the AUTO fan speed mode is set in the cooling/heating operation:

For the heating operation

The fan speed will automatically change according to the temperatureof discharged air.

When the difference of room temperature and setting temperature islarge, fan starts to run at HI speed.

When the room temperature reaches setting temperature, fan speedchanges to LOW automatically.

When the difference of room temperature and setting temperature islarge, fan starts to run at HI speed.

After room temperature reaches the preset temperature, the coolingoperation, which changes the fan speed and room temperature to obtainoptimum conditions for natural healthful cooling will be performed.

For the cooling operation

FAN OPERATION

You can use the device simply as an air circulator. Use this function to dry the interior of the indoorunit at the end of summer.

Press the FUNCTION selector so that the display indicates (FAN).

Press the (FAN SPEED) button.

Press the (START/STOP) button. Fan operation starts witha beep. Press the button again to stop operation.

12

STARTSTOPRESET

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– 16 –

HOW TO SET THE TIMER

ON/OFF-Timer

The device will turn on (off) and off(on) at the designated times.

The switching occurs first at thepreset time that comes earlier.

The arrow mark appearing on thedisplay indicates the sequence ofswitching operations.

1 Press the (ON-OFF)button so that the (OFF)mark blinks.

OFF-Timer

You can set the device to turn offat the present time.

After you change thebatteries;

How to Cancel Reservation

Point the signal window of the remote controller toward the indoor unit, and press the (CANCEL)button.The (RESERVED) sign goes out with a beep and the (TIMER) lamp turns off on the indoor unit.

1 Set the current month andday with the TIMER controlbutton.

1 Press the (OFF-TIMER)button. The (OFF) mark blinkson the display.

1 Press the (ON-TIMER)button the (ON) mark blinkson the display.

2 Set the turn-off timewith the TIMER controlbutton.Press the (RESERVE)button.

3 Press the (ON-TIMER) button so that the (OFF) mark lights andthe (ON) mark blinks.

NOTEYou can set only one of the OFF-timer,ON-timer and ON/OFF-timer.

ON-Timer

Time, Day, Month

The device will turn onat the designated times.

TIME, DAY,MONTH(current time,day, month)

OFF TIMER

ON TIMER

RESERVE

CANCEL

M DM D

AMSTOPStart

AM

StartStop

PM

Start Stop

PM

AM

PM

RESET

0285E (08/10/14KH2) 6-19 24/11/05, 10:24 AM16

– 17 –

3 Point the signal window of the remote controller toward the indoor unit, andpress the (RESERVE) button.The (OFF) mark starts lighting instead of flashing and the sign (RESERVED)lights. A beep occurs and the (TIMER) lamp lights on the indoor unit.

The time indication will disappearautomatically in 10 second.

To check the current time setting,press the (TIME) button twice.

The setting of the current time isnow complete.

The timer may be used in three ways: off-timer, on-timer, and ON/OFF (OFF/ON)-timer. Setthe current time at first because it serves as a reference.

As the time settings are stored in memory in the remote controller, you only have to pressthe (RESERVE) button in order to use the same settings next time.

2 Press the(TIME) button.

3 Set the current time with theTIMER control button.

Example: The current time is 1:30 p.m.

2 Set the turn-off time with theTIMER control button.

The setting of turn-off time is now complete.

Example: The device will turn off at 11:00p.m.

Example:The device will automatically turn on earlier so that the presettemperature can be reached at 7:00 a.m.The setting of the turn-on time is now complete.

4 Set the turn-on time with theTIMER control button.

5 Point the signal window of the remote controller toward the indoor unit, andpress the (RESERVE) button.The (ON) mark starts lighting instead of flashing and the (RESERVED) signlights. A beep occurs and the (TIMER) lamp lights on the indoor unit.

3 Point the signal window of the remote controller toward the indoor unit, andpress the (RESERVE) button.The (ON) mark starts lighting instead of flashing and the (RESERVED) signlights. A beep occurs and the (TIMER) lamp lights on the indoor unit.

2 Set the turn-on time with theTIMER control button.

Example:The device will turn off at 10:30 p.m. and then automaticallyturn on earlier so that the preset temperature can be reachedat 7:00 a.m.The settings of the turn-on/off times are now complete.

4 Press the (TIME) button again.The time indication starts lightinginstead of flashing.

PM PMAM

PM

PM

PM

AMAM

AMAM

PM

PM

0285E (08/10/14KH2) 6-19 24/11/05, 10:24 AM17

– 18 –

HOW TO SET THE SLEEP TIMER

1 Set the ON-timer.

Set the current time at first if it is not set before (see the pages for settingthe current time). Press the (SLEEP) button, and the display changes asshown below.

Mode

Sleep timer

Indication

1 hour 2 hours 3 hours 7 hoursSleep timer off

4 4 44

1

Sleep Timer: The device will continue working for the designatednumber of hours and then turn off.Point the signal window of the remote controller toward the indoorunit, and press the SLEEP button.The timer information will be displayed on the remote controller.The TIMER lamp lights with a beep from the indoor unit. When thesleep timer has been set, the display indicates the turn-off time.

Example: If you set 3 hours sleeptime at 11:38 p.m., the turn-offtime is 2:38 a.m.

2 Press the (SLEEP) button and set the sleep timer.

The device will be turned off by the sleeptimer and turned on by on-timer.

How to Cancel Reservation

Point the signal window of the remote controller toward the indoor unit, and press the (CANCEL)button.The (RESERVED) sign goes out with a beep and the (TIMER) lamp turns off on the indoor unit.

Example:

In this case, the device will turn offin 2 hours (at 1:38 a.m.) and turnon early so that the presettemperature will be almost reachedat 6:00 next morning.

SLEEP

H

HAM

AM

Sleeptimer

Start

H

0285E (08/10/14KH2) 6-19 24/11/05, 10:24 AM18

– 19 –

Cooling

“ ”

and

dehumidifying

“ ”

Explanation of the sleep timer

The device will control the FAN SPEED and room temperature automaticallyso as to be quiet and good for people’s health.You can set the sleep timer to turn off after 1, 2, 3 or 7 hours. The FANSPEED and room temperature will be controlled as shown below.

Function Operation

The settings of room temperature and circulation are varied.

The room temperature will becontrolled 2°C above thetemperature and the FANSPEED will be set to LOWsetting 60 minutes after thesetting of the sleep timer.

Fan

“ ”

Heating

“ ”

The room temperature will becontrolled 5°C below thetemperature and the FANSPEED will be set to LOWsetting 60 minutes after thesetting of the sleep timer.

Operation with the sleep timer

If date or current time is not set, sleep timer can not be set. If you set the sleep timer after the off-, on/off- or off/on-timer has been set, the sleep timer

becomes effective instead of the off-, on/off- or off/on-timer set earlier. You can not set other timer during sleep timer operation. After sleep timer time is up and when press sleep button again, the sleep timer will be set as

last setting. Sleep timer effective only once.

NOTE

Sleeptimer set

60 minutes later 3 hours later

7 hours later2 hourslater

6 hourslater

2°C

0285E (08/10/14KH2) 6-19 24/11/05, 10:24 AM19

– 20 –

ADJUSTING THE AIR DEFLECTOR

1

2 Adjustment of the conditioned air to the left and right.

Hold the vertical air deflector as shown in the figure and adjustthe conditioned air to the left and right.

If the “ (AUTO SWING)” button is pressed once,the horizontal air deflector swings up and down. If thebutton is pressed again, the deflector stops in its currentposition. Several seconds (about 6 seconds) may berequired before the deflector starts to move.

Use the horizontal air deflector within the adjusting rangeshown on the right.

When the operation is stopped, the horizontal air deflectormoves and stops at the position where the air outletcloses.

Vertical

Vertical

about 15

about 60

about 45

about 30

When cooling,dehumidifying

When heating

! CAUTION

In “Cooling” operation, do not keep the horizontal airdeflector swinging for a long time. Some dew may formon the horizontal air deflector and dew may drop.

RESET

Adjustment of the conditioned air in the upward and downwarddirections.

The horizontal air deflector is automatically set to the properangle suitable for each operation. The deflector can be swungup and down continuously and also set to the desired angleusing the “ (AUTO SWING)” button.

! CAUTION

When operating the unit in cooling operation with the air deflector facing down and movingautomatically for a long period of time, water will condensed on the air deflector and drips downoccasionally. This will wet your furniture.

0285E (08/10/14KH2) 20-28 24/11/05, 10:25 AM20

– 21 –

HOW TO EXCHANGE THE BATTERIES IN THE REMOTE CONTROLLER

1 Remove the cover as shown in the figure and take out theold batteries.

=

2 Install the new batteries.The direction of the batteries should match the marks in thecase.

1. Do not use new and old batteries, or different kinds of batteriestogether.

2. Take out the batteries when you do not use the remote controllerfor 2 or 3 months.

CAUTION!

Push and pull to thedirection of arrow

0285E (08/10/14KH2) 20-28 24/11/05, 10:25 AM21

– 22 –

Suitable Room Temperature Install curtain or blinds

Ventilation Effective Usage Of Timer

Do Not Forget To Clean The Air Filter Please Adjust Suitable TemperatureFor Baby And Children

WarningFreezing temperatureis bad for health and awaste of electric power.

! It is possible toreduce heatentering theroom throughwindows.

At night, please use the “OFF or ON timeroperation mode”, together with your wake uptime in the morning. This will enable you toenjoy a comfortable room temperature. Pleaseuse the timer effectively.

Dusty air filter will reduce the air volume andthe cooling efficiency. To prevent from wastingelectric energy, please clean the filter every 2weeks.

Please pay attention to the room temperatureand air flow direction when operating the unitfor baby, children and old folks who havedifficulty in movement.

CautionDo not close the room for a long period oftime. Occasionally open the door and windowsto allow theentrance offresh air.

!

THE IDEAL WAYS OF OPERATION

0285E (08/10/14KH2) 20-28 24/11/05, 10:25 AM22

– 23 –

FOR USER’S INFORMATION

The Air Conditioner And The Heat Source In The Room

Not Operating For A Long Time

When Lightning Occurs

CautionIf the amount of heat in the room is above the coolingcapability of the air conditioner (for example: morepeople entering the room, using heating equipmentsand etc.), the preset room temperature cannot beachieved.

!

When the indoor unit is not to be used for a longperiod of time, please switch off the power from themains. If the power from mains remains “ON”, theindoor unit still consumes about 8W in the operationcontrol circuit even if it is in “OFF” mode.

WarningTo protect the whole unit during lightning, pleasestop operating the unit and remove the plug from thesocket.

!

OFF

Interference From Electrical Products

CautionTo avoid noise interference, please place the indoorunit and its remote controller at least 1m away fromelectrical products.

! Inverter-type fluorescentlamp.

To preventinterference,place at least1m away.

TV

0285E (08/10/14KH2) 20-28 24/11/05, 10:25 AM23

– 24 –

ATTACHING THE AIR CLEANSING AND DEODORIZING FILTERS

1 Open the front panel. Pull up the front panel by holding it at both

sides with both hands.

2 Remove the filter. Push upward to release the claws and pull out

the filter.

3 Attaching the air cleansing and deodorizingfilters to the filter. Attach the air cleansing and deodorizing filters

to the frame by gently compress its both sidesand release after insertion into filter frame.

4 Attach the filters. Attach the filters by ensuring that the surface

written “FRONT” is facing front. After attaching the filters, push the front panel

at three arrow portion as shown in figure andclose it.

Cleaning and maintenance must be carried out only by qualified service personal. Before cleaning,stop operation and switch off the power supply.

CAUTION!

! CAUTIONDo not bend the air cleansingand deodorizing filter as it maycause damage to the structure.

NOTE

In case of removing the air cleansing and deodorizing filters, please follow the above procedures. The cooling capacity is slightly weakened and the cooling speed becomes slower when the air cleansing

and deodorizing filters are used. So, set the fan speed to "HIGH" when using it in this condition. Air cleansing and deodorizing filters are washable and reusable up to 20 times by using vacuum

cleaner or water rinse under running tap water. Type number for this air cleansing filter is<SPX-CFH11>. Please use this number for ordering when you want to renew it.

Do not operate the air conditioner without filter. Dust may enter the air conditioner and fault may occur.

0285E (08/10/14KH2) 20-28 24/11/05, 10:26 AM24

– 25 –

MAINTENANCE

Cleaning and maintenance must be carried out only by qualified service personal. Before cleaning,stop operation and switch off the power supply.

1. AIR FILTER

Clean the air filter, as it removes dust inside the room. In case the air filter is full of dust, the air flowwill decrease and the cooling capacity will be reduced. Further, noise may occur. Be sure to clean thefilter following the procedure below.

! CAUTION

1 Open the front panel and remove the filter Gently lift and remove the air cleansing and

deodorizing filter from the air filter frame.

2 Vacuum dust from the air filter and air cleansingand deodorizing filter using vacuum cleaner. Ifthere is too much dust, rinse under running tapwater and gently brush it with soft bristle brush.Allow filters to dry in shade.

3 Re-insert the air cleansing and deodorizingfilter to the filter frame. Set the filter with“FRONT” mark facing front, and slot them intothe original state.

After attaching the filters, push the front panelat three arrow portions as shown in figureand close it.

! CAUTION

Do not wash with hot water at more than 40°C. The filter may shrink.

When washing it, shake off moisture completely and dry it in the shade; do not expose it directly tothe sun. The filter may shrink.

Do not use detergent on the air cleansing and deodorizing filter as some detergent may deterioratethe filter electrostatic performance.

PROCEDURE

NOTE: Air cleansing and deodorizing filter should be cleaned every month or sooner if noticeable loading

occurs. When used overtime, it may loose its deodorizing function. For maximum performance, it isrecommended to replace it every 3-6 months depending on application requirements.

0285E (08/10/14KH2) 20-28 24/11/05, 10:26 AM25

– 26 –

3. MAINTENANCE AT BEGINNING OF LONG OFF PERIOD

Run the unit by setting the operation mode to(FAN) and the fan speed to HI for about half a dayon a fine day, and dry the whole of the unit.

Switch off the power plug. AirBlow

2. Washable Front Panel

Remove the front panel and wash with cleanwater.Wash it with a soft sponge.After using neutral detergent, wash thoroughlywith clean water.

When front panel is not removed, wipe it witha soft dry cloth. Wipe the remote controllerthoroughly with a soft dry cloth.

Wipe the water thoroughly.If water remains at indicators or signalreceiver of indoor unit, it causes trouble.

Method of removing the front panel.Be sure to hold the front panel with both handsto detach and attach it.

! CAUTION

Do not splash or direct water to the body of the unit when cleaningit as this may cause short circuit.

Never use hot water (above 40°C), benzine, gasoline, acid, thinner ora brush, because they will damage the plastic surface and the coating.

Removing the Front Panel

When the front panel is fully opened withboth hands, push the right arm to the insideto release it, and while closing the front panelslightly, put it out forward.

Attaching the Front Panel

Move the projections of the left and rightarms into the Flanges in the unit andsecurely insert them into the holes.

Projection

Flange

Hole

0285E (08/10/14KH2) 20-28 24/11/05, 10:26 AM26

– 27 –

Cleaning and maintenance must be carried out only by qualified service personal. Before cleaning,stop operation and switch off the power supply.

! CAUTION

Confirm

CAUTION

Please use earth line.Do not place the earth line near water or gas pipes, lightning-conductor, or the earthline of telephone. Improper installation of earth line may cause electric shock.

!

A circuit breaker should be installed depending on the mounting site of the unit. Without a circuitbreaker, the danger of electric shock exists.

IMPORTANTThe wires in this mains lead are coloured in accordance with the following code:

Green-and-yellow : EarthBlue : NeutralBrown : Live

As the colours of the wires in the mains lead of this appliance may not correspond with the colouredmarkings identifying the terminals in your plug, proceed as follows:The wire which is coloured green-and-yellow must be connected to the terminal in the plug which ismarked with the letter E or by the earth symbol or coloured green or green-and-yellow.The wire which is coloured blue must be connected to the terminal which is marked with the letter Nor coloured black.The wire which is coloured brown must be connected to the terminal which is marked with the letterL or coloured red.

NOTEIf the supply cord is damaged, it must be replaced by the special cord obtainable at authorized service/parts centers.

1

2

3

REGULAR INSPECTION

PLEASE CHECK THE FOLLOWING POINTS BY QUALIFIED SERVICE PERSONAL EITHEREVERY HALF YEARLY OR YEARLY. CONTACT YOUR SALES AGENT OR SERVICE SHOP.

Is the earth line disconnected or broken?

Is the mounting frame seriously affected by rust and is theoutdoor unit tilted or unstable?

Is the plug of power line firmly plugged into the socket?(Please ensure no loose contact between them).

0285E (08/10/14KH2) 20-28 24/11/05, 10:26 AM27

– 28 –

Please note:On switching on the equipment, particularly when the room light is dimmed, a slight brightness fluctuationmay occur. This is of no consequence.The conditions of the local Power Supply Companies are to be observed.

AFTER SALE SERVICE AND WARRANTY

WHEN ASKING FOR SERVICE, CHECK THE FOLLOWING POINTS.

When it does not operate

Is the fuse all right? Is the voltage extremely high or low? Is the circuit breaker “ON”?

Was the air filter cleaned? Does sunlight fall directly on the outdoor unit? Is the air flow of the outdoor unit obstructed? Are the doors or windows opened, or is there any source of

heat in the room? Is the set temperature suitable?

CONDITION CHECK THE FOLLOWING POINTS

Notes In quiet operation or stopping the operation, the following phenomena

may occassionally occur, but they are not abnormal for the operation.(1) Slight flowing noise of refrigerant in the refrigerating cycle.(2) Slight rubbing noise from the fan casing which is cooled and then

gradually warmed as operation stops. The odor will possibly be emitted from the room air conditioner because

the various odor, emitted by smoke, foodstuffs, cosmetics and so on,sticks to it. So the air filter and the evaporator regularly must be cleanedto reduce the odor.

Please contact your sales agent immediately if the air conditioner still fails to operate normally after the aboveinspections. Inform your agent of the model of your unit, production number, date of installation. Please alsoinform him regarding the fault.

Power supply shall be connected at the rated voltage, otherwise the unit will be broken or could not reach thespecified capacity.

When it does not cool wellWhen it does not hot well

Minimum Maximum Minimum Maximum

IndoorDry bulb °C 21 32 20 27Wet bulb °C 15 23 12 19

OutdoorDry bulb °C 21 43 2 21Wet bulb °C 15 26 1 15

Note Avoid to use the room air conditioner for cooling operation when the outside temperature is below

21°C (70°F).The recommended maximum and minimum operating temperatures of the hot and cold sidesshould be as below:

Cooling Heating

0285E (08/10/14KH2) 20-28 24/11/05, 10:26 AM28

– 29 –

CONSTRUCTION AND DIMENSIONAL DIAGRAMMODEL RAS-08KH2/10KH2/14KH2

Note:1. Servicing space of 100mm or more is required on the left and right sides of the indoor unit and also 50mm or

more space is required above the unit2. Insulated pipes should be used for both the narrow and wide dia. pipes.3. Piping length is within 15m (RAS-14KH2), 10m (RAS-08KH2/RAS-10KH2)4. Height different of the piping between the indoor unit and the outdoor unit should be within 5m.5. Power supply cord length is about 2m6. Connecting cable 2.5mm dia. x 3 (AB Line), 1.6mm dia. x 2 (CD Line) is used for the connection.

DCBA

LN

DCBA

Indoor UnitOutdoor Unit

ConnectingCord

ø1.6 or ø2.0

ø2.0

Linecord

REDBRN

WHTBLK

Power cord

Connecting cord

Drain hose

Approx 370 Approx 70 Narrow pipe (06.35)

Wide pipe (09.52)

Mounting plate

210

780

280

50

Discharge grill

Top air suction grill

50

47

205

Front panel

Approx 108

Drain pan

Drain cap connection port

H-deflector

Indoor unit service space

47

(190)

400 400 (190)

7070

60

30 60 22 60 81.5

47

V-deflector

47

560

11

5

When piping isdrawn horizontally,exchange the drainhose for the drain cap

147

56 17.5

About 380

Abo

ut 3

50

View from back(Pipe lead-out)

0285E (08/10/14KH2) 29-33 24/11/05, 10:27 AM29

– 30 –

MODEL RAC-08KH2 / RAC-10KH2

MODEL RAC-14KH2

Air outlet

Handle

Air inlet

(18)

490

Handle

Viewed from P

157

245

225

8

10

50035

12

16

55

570

428

700

243

53 236

210 10 482

517

135

75

77

P

500

1237

124

57

1655628 750

85276

570

95 166

559

2616 280

195

280

1510

340

340

1032

0

0285E (08/10/14KH2) 29-33 24/11/05, 10:27 AM30

– 31 –

MAIN PARTS COMPONENT

THERMOSTAT (Room Temperature Thermistor)

Thermostat Specifications

FAN MOTOR

Fan Motor Specifications

CONNECTION

INDICATION16

INDICATION24

INDICATION32

MODEL RAS-08KH2/10KH2/14KH2

THERMOSTAT MODEL IC

OPERATION COOL HEAT

ON 16.6 (61.9) 18.7 (65.6)

OFF 16.0 (60.8) 19.3 (66.7)

ON 24.6 (76.3) 26.7 (80.1)

OFF 24.0 (75.2) 27.3 (81.1)

ON 32.6 (90.7) 34.2 (94.5)

OFF 32.0 (89.6) 35.3 (95.5)

MODEL RAS-08KH2/10KH2/14KH2 RAC-08KH2/10KH2/14KH2

PHASE

RATED VOLTAGE

– – – – – SINGLE

RATED FREQUENCY

DC35V 220-240V

TEMPERATURE °C (°F)

OUTPUT

POLE NUMBER – – – – – 6

20 W 20W 30W 30W

– – – – – 50 Hz

35V

5V

RED

YELLOW

BLUE

M BLACK

CAPACITORRA

RED

INTERNALTHERMAL FUSE

GRAY

RM

RESISTANCE VALUE( )

20°C

75°C

– – – – –

– – – – –

RM = 355.1RA = 252.6

RM = 250.3RA = 171.1

RM = 253.0RA = 173.4

RM = 431.9RA = 307.1

RM = 304.4RA = 208.1

RM = 307.7RA = 210.9

0285E (08/10/14KH2) 29-33 24/11/05, 10:27 AM31

– 32 –

MODEL RAC-08KH2/10KH2/14KH2

COMPRESSOR MODEL 5RS080 5PS112 5PS132

PHASE SINGLE

RATED VOLTAGE 220 – 240 V

RATED FREQUENCY 50 Hz

LOCKED ROTOR CURRENT 45 A

POLE NUMBER 2

COMPRESSOR MOTOR

Compressor Motor Specifications

CONNECTION

20°C(68°F)

75°C(167°F)

( )

RESISTANCE VALUE

! CAUTIONWhen the Air Conditioner has been operated for a long time with the capillary tubes clogged or crushed orwith too little coolant, check the color of the refrigerant oil inside the compressor. If the color has beenchanged conspicuously, replace the compressor.

RM = 5.233RA = 5.621

EXTERNAL OVERLOAD RELAY

INTERNAL PROTECTOR

YES

NO

ORANGE RM

WHITE

RA

RED

CAPACITOR

S (RED)

C (WHITE)

M OR R (ORANGE)

RAC-08KH2 / RAC-10KH2 / RAC-14KH2

RM = 2.826RA = 5.413

RM = 3.192RA = 4.621

RM = 6.364RA = 6.836

RM = 3.437RA = 6.583

RM = 3.882RA = 5.620

0285E (08/10/14KH2) 29-33 24/11/05, 10:27 AM32

– 33 –

WIR

ING

DIA

GR

AM

MO

DE

LR

AS

-08/

10/1

4KH

2 //

RA

C-0

8/10

/14K

H2

RA

S-6

3CH

A1/

RA

C-6

3CH

A1

0285E (08/10/14KH2) 29-33 24/11/05, 10:27 AM33

– 35 –

CIRCUIT DIAGRAM

Remote Control

12345678

1011

1314151617

1920

9

12

18

SEG19SEG18SEG17SEG16SEG21SEG24SEG25SEG26SEG27SEG28

NCNCNCNCNCNCNCNCNC

SEG20SEG5SEG0SEG1SEG2SEG3SEG4SEG5SEG6SEG7COM3COM2COM1COM0SEG14SEG13SEG12SEG11SEG13SEG9SEG8

4039383736353433

3130

2827262524

2221

32

29

23

4039383736353433

3130

28272625

32

29

64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 4142

6566676869707172

7475

77787980

73

76

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 2423

SEG20SEG21SEG22SEG23SEG24SEG25SEG26SEG27SEG28SEG29SEG30SEG31SEG32SEG33SEG34SEG35

SEG1

9SE

G18

SEG1

7SE

G16

SEG1

5SE

G14

SEG1

3SE

G12

SEG1

1SE

G10

SEG9

SEG8

SEG7

SEG6

SEG5

SEG4

SEG3

SEG2

SEG1

SEG0

SEG4

3SE

G42

SEG4

1SE

G40

P40

P41

P42

P43

P00

P01

P02

P03

P10

P11

P12

P13

D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 BEEP

P20

P30P31

NCVL C1VL C2VL C3XC IN

XC OUTVDD

X OUTX IN

RESETCARR

P23P22P21

VSS

IC 1 M3455OM6A-504FP

LCD 1

C8

50v/1u

K 1D3RB425D(1/2)

K2K3

K4

K5

P10

P11

P12

K6

K7 K8

K8 K10

K11K12 K18

K17

K15 K16

K13 K14 D0

D1

D2

D3

R1100k

SW1

R2

P

100kR3

100k

R4100k

R5 Q12SC3443or 2SC2982

R6 R7 R9

D2D1

D1 D2EL-1L7

D3

(1/2)RB425D

R1012M

K19X1

C9

R11

R15

R16

R13

R14

910kHz

105

104 104

150kX2

kHz

C4 C5

C6 C7

18p 22pR12220k

220K

220k 100k

100k

32.768

C1C2 C3

220p 220p334

R6 R924(1/8W)

R8

330

SW-187-2P

Key matrix table

P10

InputOutput D0 D1 D2 D3

P11

P12

Door open

Door shut

Door open

Door shut –

Off timer –

Sleep –

On timer Hour up

Start/Stop Super silent cooling

Start/Stop

Room temperature up

Operation selection

Reservation

–

Hour down

–

Room temperature down

Fan speed selection

Super cooling

Cancel

–

Day • present time

–

Automatic swing

Door open

Door shut

0285E (08/10/14KH2) 35 24/11/05, 10:39 AM1

– 37 –

PRINTED WIRING BOARD LOCATION DIAGRAM

MODEL RAS-08KH2/10KH2/14KH2 // RAC-08KH2/10KH2/14KH2

0285E (08/10/14KH2) 37 24/11/05, 10:41 AM1

– 39 –

BL

OC

K D

IAG

RA

MM

OD

EL

RA

S-0

8KH

2/R

AS

-10K

H2/

RA

S-1

4KH

2 //

RA

C-0

8KH

2/R

AC

-10K

H2/

RA

C-1

4KH

2

IND

OO

R U

NIT

PO

WE

R S

UP

PLY

PO

WE

R R

ELA

YS

TIC

K R

ELA

Y

DC

FA

N M

OTO

RO

PE

RA

TIO

N C

IRC

UIT

WIR

ELE

SS

RE

MO

TE

CO

NT

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FM

M F M

RE

VE

RS

ING

VA

LVE

R V

0285E (08/10/14KH2) 39 24/11/05, 10:42 AM39

BASIC MODEMODEL RAS-08KH2/10KH2/14KH2 // RAC-08KH2/10KH2/14KH2

– 41 –

0285E (08/10/14KH2) 41 24/11/05, 10:44 AM1

– 43 –

Settemperature

Start/stop switch

Sleep key

Operation lamp

Timer lamp

60 minutes

5 deg down

LO (sleep operation)

Set circulation velocity

Settemperature

Start/stop switch

Sleep key

Operation lamp

Sleep key

Timer lamp

60 minutes

5 deg down

LO (sleep operation)

Set circulation velocity

Start/stop switch

Thermostat signal

Preheating signal

Fan relay H

Fan relay L

Fan relay S

Power relay

Hot keep lamp

2 sec

T 3 minutes

30 sec 30 sec 15sec 30 sec 30 sec"Strong" circulation

2 sec

TE

15 sec

15 minutes-TE

30 sec30 sec

CompletionDefrostingstart

30 sec30 sec

2 sec

10 sec

Start/stop switch

Defrosting signal

Preheating signal

Fan relay H

Fan relay L

Fan relay S

Power relay

Stick relay

External fan relay

Reversing valve relay

Heater relay

Operation lamp

Hot keep lamp

2 sec

10 sec

TA

30 sec 60 sec 3 minutes

TA

30 sec 60 sec

TB TC

15 sec

Indoor heat exchangerthermistor temperature

T1

Fan relay H

Power relay

Stick relay

Outside fan relay

Operation lamp

Fan relay S

Power relay

Stick relay

Outside fan relay

Operation lamp

Min. 3 minutes

Set circulation velocitySet circulation velocity

Settemperature

Start/stop switch

Sleep key

Operation lamp

Timer lamp

60 minutes60 minutes

2 deg up

LO (sleep operation)

Control function

Operation modeFan Cooling Sensor dehumidification Heating Automatic

• Sleep operation is executedfor each operation mode.

• Sleep operation is executedfor each operation mode.

• At the time of heatingoperation mode, the sameoperation as for heatingis executed.

• Defrosting of each operationmode is executed.

7• The operation is

switched OFFat the set time.

8Preheatingoperation

9Defrosting(including automaticfresh defrosting).

Notes:• 60 minutes after the sleep key is switched on, sleep operation

is started.• When the sleep key is switched on during OFF timer operation,

the OFF timer will be canceled.

• When the sleep key is switched on during OFF timer operation, the OFF timer will be cancelled.

• When the sleep key is switched on during ON after a timer reservation, sleep operation will be started.

Notes:• Even when the preheating signal is not given as input, heating operation is started when

3 minutes have passed for T.• Preheating operation is executed at the time of operation start and after completion

of defrosting, and at all other times, there is no operation, independent of the preheating signal.

TA(Reverse cycle defrosting)

10 min.min.

TB(Silencing period)

30 sec

TC(Cycle balancing time)

30 sec

TE(Defrosting prohibition

time)

50 min.min.+0

-5

+0-1

• For the time TE after start of heating operation, defrosting will not beexecuted even when the defrosting signal is given as input.

• When the reserve cycle defrosting TA has continued for the timeshown in the table on the left, the operation advances to TB and TCindependent of the defrosting signal.

• When the power relay becomes ON after expiration of the time TE,defrosting will be started immediately with input of the defrosting signal.

• Once defrosting has been completed, the defrosting signal is notaccepted for the time TE.

• When a defrosting signal has been given as input at the time of stopby means of the start/stop switch or at the time of OFF timer count-up,defrosting is executed before operation stop.

• The defrosting signal is not accepted at the time of overload input.

Sen

sor

dehu

mid

ifica

tion

Coo

ling

stro

ng

No.

• The set temperatureafter sleep shift insensor dehumidificationoperation is limitedby 16°C.

AutomaticHeating

Fan

SensordehumidificationCooling

HeatingCooling

YesYes

Yes

Yes

Yes

Yes (automatic)NOYes

YesYesYesYesYesYesYesYesYesYesYesNo

YesYes

Cooling/Heating

Item

Operation switching

Temporary switch

Service switch

Nice temperature reservationAutomatic fresh defrostingDefrostingPd cut 1Pd cut 2Pd cut 3Heating load reductionExternal fan relayReversing valve relayReversing valve lock protectionSleep circuit

Heater operation at the time of sensordehumidification

Automatic blowing directionFilter sign

Wireless mode

ItemCooling, Sensor 16 16.6

ON temperature dehumidification 24 24.6Thermostat (Thermostat relay) 32 32.6

operation power relay Heating 16 18.7(°C) 24 26.7

32 34.7Differential (°C) 0.33

––

Low-temperature (T1) ON (°C) 1.0defrosting Reset (°C) 12.0Preheating Reset (°C) 17.0

ON (°C) 15.0––

Pd cut 1 (T3) ON (°C) 50.0 42(T4) Reset (°C) 47.0 38

Pd cut 2 (T6) ON (°C) 63.0(T7) Reset (°C) 57.0(T5) Fan Relay H [ Original (°C) 43.0

Pd cut 3 (T8) ON (°C) 71.0(T9) Reset (°C) 63.0

Table 1 Specifications

Table 2 Sensor operation values

Other detailed specifications

1. When the room temperature riseswithin 3 minutes after thermostatOFF during cooling operation withautomatic velocity, the blowingvelocity changes in the order ofS → L → H in the same way asat the time of thermostat ON.

2. In case of Tele. control input duringstopped ON timer, operation willbe started at that time and the timerwill be cleared.

3. In case of Tele. control input duringoperation of the OFF timer, theoperation will be stopped at thattime and the timer will be cleared.

4. Even when operation stop isexecuted at the time of outside fanOFF by overload, automatic freshdefrosting will not be executed.

5. In case of switching to “Heating”during “Automatic” heatingoperation, the operation will becontinued as it is when thethermostat is ON. 3 min delay willnot be entered. However, the setroom temperature and the blowingvelocity will be according to theremote control signal. The sameapplies for switching from “Heating”to “Automatic” heating.

6. In case of switching from “Sensordehumidification” operation to“Cooling”, as it is when thethermostat is ON. 3 min delay willnot be entered. However, the setroom temperature and the blowingvelocity will be according to theremote control signal.The same applies for switchingfrom“Cooling” to “Sensor dehumidifica-tion”. The same also applies for“Automatic” sensor dehumidifica-tion, cooling “Sensor dehumidifica-tion”, “Cooling”.

7. The filter sign lights after operationof the indoor fan for 100 hours.The time is cleared when powerswitch set to OFF and ON again.

8. After entry into trouble mode (whenthe indication lamp is flashing), therapid feed mode can not bechanged.

9. When operation by nicetemperature reservation isexecuted during sleep operation,normal operation will be continued,and the advance time becomes thetemperature difference between theset temperature without sleep shiftand the room temperature.

10. The 50 minutes of defrostingprohibition are counted fromThermostat ON after start/stopswitch ON. When the thermostatis OFF at the time of start/stopswitch ON, the 60 minutes will becounted from the time of thermostatON. The initial OFF time is notcounted. Counting starts when thethermostat becomes ON, and thecount then continues even if thethermostat becomes OFF.

11. In case of switching from “Heating”the reversing valve is held for 3minutes.

12. The defrosting signal is notaccepted with overload input, andthe operation becomes as shownbelow when the overload inputdisappears.

(1) When previously thedefrosting signal existedwithout overload input,defrosting will startimmediately.

(2) In cases other than theabove, defrosting will beexecuted with a defrostingsignal in the conditionwithout overload input.

RAS-08KH2/10KH2 RAS-14KH2

0285E (08/10/14KH2) 43 24/11/05, 10:46 AM1

The air deflector control operation shown below is done when the swing switchis pressed or when the operation mode is changed.

The air deflector control operation shown below is done when the operationswitch is turned off.

Item 3-way AUTO (Swing)Specification

Cooling/dehumidi-fying

Heating

(When theoperationswitch isturned offAutomaticshutoperation)

Airblowingdirectioncontrol

8

Other detailed specifications

1. When the room temperature starts toincrease within 3 minutes after thermoOFF in “cooling” and fan speed “AUTO”,the fan speed changes L M H aswhen thermo ON.

2. If “cooling” is selected during “sensordehumidification” operation the operationcontinues as it is with the thermo ON.The 3 minutes delay is not started. Theset temperature and fan speed dependon the remote control signal.It is same for “cooling” – – – – “sensordehumidification”. It is same for “AUTO”sensor dehumidification cooling “sensordehumidification” “cooling”.

3. The filter sign lights after 100 hoursoperation of the room fan. The lamp goesout when the POWER SWITCH set toOFF and ON again.

4. After the failure mode is started (indicatorlamp flickering), rapid mode changingcannot be done.

5. If the operation is made by the nicetemperature reservation during the sleepoperation, the normal operationcontinuously occurs, and for the advancetime, the temperature difference betweenthe set temperature without sleep shiftand “room temperature” is used.

– 45 –

Operation starts in advance so that the room temperature reachesthe preset value at the set time.

The operation time is obtained as follows depending on the roomtemperature when operation starts.

(1) Calculation method of the moved-up time.Moved-up time (MT) = Moved-up time depending on the temperaturedifference (OT) + compensation time (HT).MT is at least 1 minute if OT is not zero.

Heating Cooling

(MT) 00 ~ 60 min. 00 ~ 60 min.

(OT) 00 ~ 60 min. 00 ~ 60 min.

(HT) –60 ~ 60 min. –60 ~ 60 min.

Obtain OT (moved-up time depending on the temperature difference)from the table below.

10

“NICETEMPERA-TURE”reservation

Heating CoolingSetting temp. – Room temp. Time (min.) Setting temp. – Room temp. Time (min.)

00 – 01.00 00 00.00 – 02.00 0001.25 – 03.00 10 02.25 – 05.00 1503.25 – 07.00 20 05.25 – 08.00 3007.25 – 10.00 30 08.25 – 11.00 4510.25 – 13.00 40 11.25 – 6013.25 – 16.00 5016.25 – 19.00 6019.25 – 22.00 6022.25 –

The preset temperature value shown above does notinclude any shift value.

(2) Compensation

1 The “Attained” state is monitored and a “Not attained” check isdone to revise the compensation time (HT).

“Attained” monitor

Continuously monitored during “NICE TEMPERATURE” operation.

(Heating)

When the room temperature < Set value + compensation shift, itis regarded to be “attained” and 5 minutes are reduced from thecompensation time.

(Cooling)

When the room temperature < Set value + compensation shift, it’soperated same as above.

“Not attained” check

Performed once when the “NICE TEMPERATURE” timer is completed.

(Heating)

When the room temperature < Set value + compensation shift 1°C,it is regarded to be “Not attained” and 5 minutes are added to thecompensation time.

(Cooling)

When the room temperature > Set value + compensation shift+1°C, it’s operated same as above.

If the room temperature is within +1°C from the set value +compensation shift, compensation is not done.

Item

ON temperatureThermostat operation (Thermostat relay)

power relay (°C)

Differential (°C)

Low-temperature defrosting

Cooling, sensordehumidification

(T1)

RAS-08/10/14KH216 16.624 24.632 32.6

0.33

ON (°C) 1.0Reset (°C) 12.0

Table 2 Sensor operation values

Item RAS-08/10/14KH2Automatic YesHeating Yes

Operation switching Sensor dehumidification YesCooling YesFan Yes

Temporary switch Yes (automatic)Service switch Cooling YesNice temperature reservation YesDefrosting YesSleep circuit YesHeater operation at the time of sensor dehumidification NoAutomatic blowing direction YesFilter sign YesWireless mode Heat and Cool wireless

Table 1 Specifications

DownUp

Down

Up

Swing start direction

Down

Up

Swing start direction

0285E (08/10/14KH2) 45 24/11/05, 10:47 AM1

– 47 –

REFRIGERANT CYCLE DIAGRAMMODEL RAS-08KH2/RAC-08KH2

2S—VALVE

STRAINER

HEATING &COOLINGCAPILLARYSTRAINER

CHARGINGPIPE

COMP

CONDENSER

REVERSINGVALVE

S — TANK

3S — VALVE

EVAPORATOR

MODEL RAS-10KH2/RAC-10KH2

COMP

CONDENSER

REVERSINGVALVE

HEATINGCAPILLARY

STRAINER

CHARGINGPIPE

CHECK VALVE STRAINER

HEATING &COOLINGCAPILLARY

S-TANK

3S-VALVE

2S-VALVE

EVAPORATOR

0285E (08/10/14KH2) 47-71 24/11/05, 10:17 AM47

– 48 –

MODEL RAS-14KH2/RAC-14KH2

HEATINGCAPILLARY

STRAINER

CHARGINGPIPE

HEATING &COOLINGCAPILLARY

EVAPORATOR

2S — VALVE

3S — VALVE

S — TANK

COMP

CONDENSER

REVERSINGVALVE

ACCUMULATOR

STRAINERCHECK VALVE

0285E (08/10/14KH2) 47-71 24/11/05, 10:17 AM48

– 49 –

DESCRIPTION OF MAIN CIRCUIT OPERATION

1. ON / OFF

The “ON / OFF” and “Timer reserve button” and “Sleeping” function independently.Their operations are shown in Fig. 1-1.

ON/OFF button

Timer reserve button(Sleeping)

Operation lamp

Timer lamp

When OFFtimer(sleeping)is set

Start Stop Start

"OFF" time

When ONtimer is set

"ON" time

ON/OFF button

Timer reserve button

Operation lamp

Timer lamp

StopStart

Fig. 1-1 Timer operation

0285E (08/10/14KH2) 47-71 24/11/05, 10:17 AM49

– 50 –

2. Reset Circuit

The reset circuit is used to reset the program to its initial settings when the power is turned on or when thepower is recovered after a power failure.

The micro computer is reset when the reset input is “Hi”, and operation is possible when the reset input is“Lo”.

The waveforms at each point when the power is turned on and off are shown in the diagrams.

When the power is turned on, the voltages of the DC 12V line and DC 5V lines are increased. When thevoltage of DC 12V lines reaches about 7V, ZD511 is turned ON, the potential of Q511’s base rises and Q511is turned ON. Since Q511’s collector is set to “LO” at this time, Q512 is turned OFF and the reset input ofthe micro computer is set to “Lo”. The DC 5V line voltage has already become 5V at this time and the microcomputer starts operation.

When the power is turned OFF, the voltage of the DC 12V line decreases. When it becomes about 7V, ZD511is turned OFF, then Q511 is turned OFF, Q512 is turned ON the reset input of the micro computer is set to“Hi’ and the micro computer is set to the reset mode.

POWER ON

12V

7V

5V

DC12V Line

DC5V Line

Base

POWER OFF

5VMicro computerPin 26

12V

5V

0V

0V

Q511 C512

26

Micro computer(AX-3U)

RES

Q512R

511

R51

4

ZD

511

R51

3

R51

5

R51

2 +

C51

1

0285E (08/10/14KH2) 47-71 24/11/05, 10:17 AM50

– 51 –

3. Buzzer Circuit

Micro computer(AX-3U)

BUZZER

BZ1

12V

0V

R80

1

Q30

2

B.Z

30

When the buzzer is to be activated, buzzer output pin 30 of the micro computer alternates between ON and OFFrepeatedly at 4kHz and Q302 is turned ON/OFF accordingly. A 4kHz voltage is applied to the buzzer and thediaphragm of the buzzer vibrates to output 4kHz sound.

4. Initial setting (IC301)

The pre-heating operation start value, ratings of the compressor, maximum rotation speed, etc. are preset inthe micro computer.

5. Receive circuit

Infrared signals from the wireless remote controller are received by the light receiving unit and output after beingamplified and shaped.

8 7IC301

(E 2PROM)

6 5

5V

0V

R302

Micro computer(AX-3U)

3

4R305

5V

C30

1

C30

2

D30

4

D30

3

R30

3

D30

2

D30

1

R30

6

1 2 4

0V

3

R621

R712C710

ZD

701

0V

0V

R622

ReceiverUnit

R71

4

R71

3

12V

27

Micro computer(AX-3U)

REMOCON I/P

0285E (08/10/14KH2) 47-71 24/11/05, 10:17 AM51

– 52 –

6. Service Operation Circuit

Use the service switch to select “Cooling” temporarily when the interior electric equipment has troubled.

Setting the switch to “Cooling” causes continuous cooling room temperature control. To control the roomtemperature, turn on and off the disconnect switch. To protect the compressor, wait at least 3 minutesbefore turning on again.

The fan speed is “MED”.

Does not operate is 12V is not generated in the control circuit.

When the service switch is used for operation, each change switch is overridden.

Setting the service switch to “Cooling” turns on the “Stick relay” and “Power relay”.

Micro computer(AX-3U)

FORCE COOL 42

5V

0V

R606

CoolNormal

0285E (08/10/14KH2) 47-71 24/11/05, 10:17 AM52

– 53 –

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0285E (08/10/14KH2) 47-71 24/11/05, 10:17 AM53

– 54 –

SERVICE CALL Q & A

While cooling, thecompressor sometimes stopsabruptly.

Q1Check whether frost stickson the heat exchanger of in-door unit or not.Wait for 3 – 4 minutes untilthe frost melts.

A1If cooling is performancewhen the room temperatureis low, frost may stick on theheat exchanger of indoorunit.

Cooling operation

The fan speed does notchange during adehumidifying operation.

Q2

Dehumidifying operation

The fan speed is always LOat a dehumidifying operation.A2

Cold air comes out during adehumidifying operation.Q3

To improve the dehumidi-fication efficiency, LO fanspeed operation isperformed. Therefore the airis cold. This is not a trouble.

A3

The operation does not stopeven by raising the roomtemperature setting of remotecontrol at a dehumidifyingoperation.

Q4At a dehumidifying operation,the actual room temperature iscompared with the room tem-perature setting when startingthe operation and the opera-tion is as follows.1) When actual room tem-

perature > room tempera-ture setting.The operation is accordingto the room temperaturesetting on the remote con-troller.

2) * When actual room tem-perature < room tempera-ture settingRegardless of the roomtemperature setting, thetemperature is automati-cally set slightly lower thanthe room temperature.

In this case, the status is as 2)and, therefore, the operationby the room temperaturecontrol is impossible. Turn offthe On / OFF switch, set theroom temperature to a newvalue and turn on the opera-tion by the On / Off switch.

A4

In the dehumidifying mode,the temperature set byremote controller is setslightly higher than the roomtemperature but theoperation starts.

Q5This is the status in 2) of(A4). The temperature is seta little lower than the roomtemperature to carry out adehumidifying operation asfar as possible.

A5

0285E (08/10/14KH2) 47-71 24/11/05, 10:17 AM54

– 55 –

Air does not come out whenstarting a heating operation.Q6

It is not a trouble. The fan isstopped to avoid cold wind.A6

When starting the operation,the heat exchanger is coldand, therefore, the fan isstopped.Wait 2–3 minutes.

Heating operation

Air does not come outsometimes while in a heatingoperation.

Defrosting is on. Wait for 5–10 minutes unit the outdoorunit is defrosted.

A7

The fan speed is set to “HI”or “MED” but the heatingoperation starts with a LO fanspeed.

Q8The heating operationstarts with a LO fan speedfor 30 seconds. If the fanspeed is set to HI, theoperation starts with LO fanspeed, followed by MEDfan speed for 30 secondsand then by HI fan speed.

A8

Q7

The operation stops duringa heating operation while theroom temperature is set at“30”.

Q9If a heating operation is per-formed when the exteriortemperature is high, the op-eration may stop to protectthe equipment.

A9

The outdoor fan does notmove at a heating operationby the service switch.

It is not a trouble.When heating, the outdoorfan is stopped to avoid ex-cessive pressure rise.

A10Q10

Heating has been turned off by the mainoperation but the “Hot keep lamp” lights andthe outdoor unit operations.

Q11

Auto fresh defrosting

“Auto fresh defrosting” operates. Whenstopping the operation, whether the outdoorunit is frosted or not is checked and, if in theaffirmative, defrosting is performed beforestopping the operation.

A11

0285E (08/10/14KH2) 47-71 24/11/05, 10:17 AM55

– 56 –

How is the automaticoperation mode determined?Q12

According to the roomtemperature, cooling ordehumidifying operation isautomatically selected.

Cooling:When room temperature isapprox. 27°C or higher

Dehumidifying:When room temperature isbetween approx. 23°C and27°C

Heating:When room temperature isapprox. 23°C or lower

A12

Automatic operation

At an automatic operation,changing the fan speedchange switch does not varythe fan speed.

Q13The fan speed is automati-cally determined.A13

The room temperaturecannot be controlled at anautomatic operation.

Q14It is automatically set asfollows.

At cooling: Set at 27°C

At dehumidifying:Set slightlylower than roomtemperature

The room temperaturesetting can be raised 3°C by“ ” or lowered 3°C by “ V ”.

A14When changing the roomtemperature setting in anautomatic operation, the nextautomatic operation mode isdetermined by new roomtemperature setting.If, for example, the roomtemperature setting is 2°Clowered for example, theoperation mode is as follows.

Cooling : When roomtemperature isapprox. 25°C orhigher

Dehumidifying :When roomtemperature isbetween approx.21°C and 25°C

Heating :When roomtemperature isapprox. 21°C orlower

V

0285E (08/10/14KH2) 47-71 24/11/05, 10:17 AM56

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There is a differencebetween the roomtemperature setting andactual room temperature.

Q15There may be a differencebetween the roomtemperature setting andactual room temperature onaccount of the roomstructure, air flow, etc.If there is a difference fromthe room temperature, adjustthe set temperature to keepliving space at a comfortabletemperature.

A15

Common, etc.

What will happen if the timesetting is changed while in atimer operation?

Q16A timer operation isperformed until the time afterchanging the time setting.

A16

In the “Automatic fan speed”mode, the indoor fanchanges to MED and LO fanspeed.

Q17It is not a trouble. The coldwind preventive functionoperates.

A17Set the temporary switchnormal.

In case of “ON” timer, the operation does notstart at a preprogrammed time but a littleearlier.

Q18

Nice temperature reservation

The “Nice temperature reservation” functions.The operation starts earlier so the roomtemperature will be as set at a programmedtime.The operation starts at most 60 minutes beforea preprogrammed time.

A18

The time to start an operation is irregularwhile preprogramming at the same time.Q19

The “Nice temperature reservation” operates.The starting time depends on the room load.A19

0285E (08/10/14KH2) 47-71 24/11/05, 10:18 AM57

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1) When the “Automatic”operation mode isselected, “Automatic”does not change bypressing the fan speedselect button.

2) The room temperaturesetting is not displayed.

3) Pressing the roomtemperature control buttondevelops transmit mark“ ” and sounds areceive sound but doesnot display the roomtemperature setting.

Q20

Wireless remote controller

The room temperaturesensing thermistor in theindoor unit detects the roomtemperature and, accordingto the particular temperature,automatically performs“Cooling” or “Dehumidifying”operation.The value indicated not at an“Automatic” but manualoperation is not the actualroom temperature but theroom temperature setting.

When the room temperaturesetting is “16”, pressing theroom temperature controlbutton “ V ” causes notransmission. At “32”,pressing “ ” causes notransmission either.

Q21The room temperature issettable within the range of16 - 32 and not beyond.

A21

The timer cannot be set.Q22

Is the current time set?The timer cannot be setunless the clock is adjustedcorrectly.

A22

V

The current time disap-pears soon.Q23

The current time disappearssoon and the timer setttingindication takes aprecedence.

A23When setting the current time,its indication blinks forapproximately 3 minutes.

1) When the operation modeis “Automatic”, the fanspeed is automaticallyfixed to “Automatic”.

2) At an “Automatic”operation, the roomtemperature setting is notdisplayed.The room temperature isautomatically set asfollows.

At cooling

Set at 27°C.

At dehumidifying

Set to a temperatureslightly lower than theroom temperature.

At heating

Set at 23°C.

3) At an “Automatic”operation, the roomtemperature setting is notdisplayed.However, every pressing“ ” or “ V ” buttonchanges 1°C within therange of:27±3°C when cooling,23±3°C when heating.

A20

V

0285E (08/10/14KH2) 47-71 24/11/05, 10:18 AM58

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In spite of timer “Preprogram”,the time setting isextinguished.

Q24Isn’t the time over the pre-programmed time?As soon as the prepro-grammed time is reached, thetime setting disappears.

A24

After selecting a“Dehumidifying” operationmode, the fan speed moderemains “LO” fan speed”.

Q25At a “Dehumidifying”operation, the “LO” fan speed”is forcibly selected.

A25

0285E (08/10/14KH2) 47-71 24/11/05, 10:18 AM59

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TROUBLE-SHOOTING

No operation at all.*1

*1 Before using the service switch,disengage and engage the plug. Do notoperate the remote controller.

Check the following parts and replace if faulty

Remove and check the continuity across.1) Current fuse

2) Varistor Check whether the appearance is blackish ornot.

The resistance must be infinite. *2

No cooling or heating

Stick relay abnormal

Power relay abnormal

YES

Check the continuity between contacts.3) Power switch

4) Thermal fuse fortherminal board

(96°C) Continuity across If there is no continuity,also check the fan motor and capacitor.

(102°C) Continuity across If there is no continuity,check the electric parts and replace if abnormal.

5) Thermal fuse forTerminal board

*2 Before checking the varistor, detach a terminal.

NO

Operates by setting the serviceswitch to forced cooling?

Return the service switch to"Normal".

Set the remote controller to anoperation status and press the ON/OFF button.

Is the level LO (approx. 0.5V)between driver IC701 pin 11 powerrelay and 0V?

NO

NO

Is the level LO (approx. 0.5V)between driver IC701 pin 10 stickrelay and 0V?

Is voltage normal between Blue andRed of the CN6? *3

NO

YESCompressor does not turn at LO.

YES

YES

Indoor fan motor orQ904 abnormal

Replace Stick relay

Replace Power relay

YES

Is the level LO (approx. 0.5V)between driver IC 701 pin 13

(Reversing valve relay) and 0V atheating operation?

NO

Reversing valverelay abnormal

Replace Reversingvalve relay

0285E (08/10/14KH2) 47-71 24/11/05, 10:18 AM60

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Is voltage normal (approx. 280 ~300V) at out put side of the DB201?

Check the circuit board ofcontrol board

YES

NO

Check the circuit board inside parts.When checking, carry out a selfdiagnosis by indoor indicator lamp.

Fan Speed

RAS-08KH2RAC-08KH2

*3

Replace faulty part*4 Wait for 3 minutes before forced

re-operation by the service switch.

CN6 BLUE-RED (V)

Cool Heat

20.8

15.6

12.5

11.0

20.8

17.9

15.0

15.0

HI

MED

LO

SLEEP MODE

RAS-10KH2RAC-10KH2

RAS-14KH2RAC-14KH2

Cool Heat

21.3

18.0

13.7

11.9

23.0

19.7

16.6

16.6

Cool Heat

27.0

20.9

15.8

13.0

28.4

23.6

19.3

19.3

0285E (08/10/14KH2) 47-71 24/11/05, 10:18 AM61

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CAUTION

Remote control is disabled while the Timer lamp is flashing.To check operation, turn off the power switch and turn it on again.

Timer-Lamp, break-down checking in blinking sign.Check the break-down factor from the frequency of timer-lamp blinking.

No. Mode of Timer-Lamp blinking Indication Factor Estimated Break-Down Part

4-way valve not workingInside temperature is low in heatingoperation time or insidetemperature is high in coolingoperation time.

(1) 4-way valve is not working.

(2) Heat-exchanger thermistor isin disconnection.

(Only heating time)

Force cooling operationUnit is under forcible operation orunder balancing after forcibleoperation.

Check force cooling switch atindoor electrical.

IC 401 Data read wronglyIn case that data read from IC401is wrong.

IC401 data is not in order.

Heat exchanger thermistor

error

Heat exchanger thermistor openor short-circuit detected.

(1) Thermistor

(2) Indoor - control circuit board.

Room thermistor errorRoom thermistor error open orshort-circuit detected.

(1) Thermistor

(2) Indoor - control circuit board.

1

2

3

4

5

6

( – – 0.5 second on, 0.5 second off.)

– – – – 15 times

– – – 14 times

– – – 13 times

– – – – – – – 2 times

– – – – – – – – 1 time5

sec.

5 sec.

5 sec.

5 sec.

5 sec.

!

DC Fan motor - over flow ofelectricityIndoor - DC Fan motor has overflow of electricity.

(1) Indoor - Fan is locked.

(2) Indoor - Fan motor damage.

(3) Indoor - control circuit board.

– – – 10 times5 sec.

0285E (08/10/14KH2) 47-71 24/11/05, 10:18 AM62

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PARTS LIST AND DIAGRAM

INDOOR UNIT MODEL : RAS-08KH2 / RAS-10KH2 / RAS-14KH2

1

12

16

15

11

10

7

20

19

27 24

1317

12

18

21

6

268

5

4

3

9

2

14

22

23

0285E (08/10/14KH2) 47-71 24/11/05, 10:18 AM63

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MODEL RAS-08KH2

1 HWRAS-25YH4 901 1 CABINET

2 HWRAS-25YH4 940 1 MOUNTING PLATE

3 HWRAS-07GH4 001 1 FAN MOTOR

4 HWRAS-25YH4 907 1 TANGENTIAL FAN

5 HWRAS-25YH4 908 1 P-BEARING ASSY

6 HWRAS-25YH4 910 1 FAN MOTOR BASE

7 PMRAS-07GH4 002 1 CYCLE ASSY

8 HWRAS-25YH4 909 1 BEARING COVER

9 HWRAS-25YH4 914 1 PIPE SUPPORT

10 HWRAS-25YH4 926 1 DRAIN PAN ASSY

11 HWRAS-25YH4 929 1 AUTO SWEEP MOTOR

13 HWRAS-25YH4 933 1 FRONT COVER ASSY

14 HWRAS-25YH4 936 1 FRONT PANEL

15 HWRAS-25YH4 937 1 AIR FILTER (R)

16 HWRAS-25YH4 938 1 AIR FILTER (L)

17 PMRAS-51CHA1 011 1 REMOTE CONTROL ASSEMBLY

18 PMRAS-10C3M 003 1 REMOTE CONTROL SUPPORT

19 PMRAS-10C8M 003 1 THERMISTOR SUPPORT

20 PMRAS-260GHA 001 1 THERMISTOR

21 HWRAS-25YH4 920 1 POWER SWITCH

22 PMRAS-07GH4 003 1 P.W.B (MAIN)

23 PMRAS-07GH4 004 1 P.W.B (POWER SW SUPPLY)

24 HWRAS-25YH4 916 1 TERMINAL BOARD (THERM-FUSE)

26 HWRAS-25YH4 939 1 LOW COVER

27 HWRAS-25YH4 917 1 TERMINAL BOARD

PART N0.RAS-08KH2

NO. Q’TY / UNIT PARTS NAME

0285E (08/10/14KH2) 47-71 24/11/05, 10:18 AM64

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MODEL RAS-10KH2

1 HWRAS-25YH4 901 1 CABINET

2 HWRAS-25YH4 940 1 MOUNTING PLATE

3 PMRAS-07GH4 001 1 FAN MOTOR

4 HWRAS-25YH4 907 1 TANGENTIAL FAN

5 HWRAS-25YH4 908 1 P-BEARING ASSY

6 HWRAS-25YH4 910 1 FAN MOTOR BASE

7 PMRAS-07GH4 002 1 CYCLE ASSY

8 HWRAS-25YH4 909 1 BEARING COVER

9 HWRAS-25YH4 914 1 PIPE SUPPORT

10 HWRAS-25YH4 926 1 DRAIN PAN ASSY

11 HWRAS-25YH4 929 1 AUTO SWEEP MOTOR

13 HWRAS-25YH4 933 1 FRONT COVER ASSY

14 HWRAS-25YH4 936 1 FRONT PANEL

15 HWRAS-25YH4 937 1 AIR FILTER (R)

16 HWRAS-25YH4 938 1 AIR FILTER (L)

17 PMRAS-51CHA1 011 1 REMOTE CONTROL ASSEMBLY

18 PMRAS-10C3M 003 1 REMOTE CONTROL SUPPORT

19 PMRAS-10C8M 003 1 THERMISTOR SUPPORT

20 PMRAS-260GHA 001 1 THERMISTOR

21 HWRAS-25YH4 920 1 POWER SWITCH

22 PMRAS-09GH4 001 1 P.W.B (MAIN)

23 PMRAS-07GH4 004 1 P.W.B (POWER SW SUPPLY)

24 HWRAS-25YH4 916 1 TERMINAL BOARD (FUSE)

26 HWRAS-25YH4 939 1 LOW COVER

27 HWRAS-25YH4 917 1 TERMINAL BOARD

PART N0.RAS-10KH2

NO. Q’TY / UNIT PARTS NAME

0285E (08/10/14KH2) 47-71 24/11/05, 10:18 AM65

– 66 –

MODEL RAS-14KH2

1 HWRAS-25YH4 901 1 CABINET

2 HWRAS-25YH4 940 1 MOUNTING PLATE

3 PMRAS-07GH4 001 1 FAN MOTOR

4 HWRAS-25YH4 907 1 TANGENTIAL FAN

5 HWRAS-25YH4 908 1 P-BEARING ASSY

6 HWRAS-25YH4 910 1 FAN MOTOR BASE

7 PMRAS-07GH4 002 1 CYCLE ASSY

8 HWRAS-25YH4 909 1 BEARING COVER

9 HWRAS-25YH4 914 1 PIPE SUPPORT

10 HWRAS-25YH4 926 1 DRAIN PAN ASSY

11 HWRAS-25YH4 929 1 AUTO SWEEP MOTOR

12 HWRAS-25YH4 922 1 P.W.B (RECEIVER)

13 HWRAS-25YH4 933 1 FRONT COVER ASSY

14 HWRAS-25YH4 936 1 FRONT PANEL

15 HWRAS-25YH4 937 1 AIR FILTER (R)

16 HWRAS-25YH4 938 1 AIR FILTER (L)

17 PMRAS-51CHA1 011 1 REMOTE CONTROL ASSEMBLY

18 PMRAS-10C3M 003 1 REMOTE CONTROL SUPPORT

19 PMRAS-10C8M 003 1 THERMISTOR SUPPORT

20 PMRAS-260GHA 001 1 THERMISTOR

21 HWRAS-25YH4 920 1 POWER SWITCH

22 PMRAS-14GH4 001 1 P.W.B (MAIN)

23 PMRAS-07GH4 004 1 P.W.B (POWER SW SUPPLY)

24 HWRAS-25YH4 916 1 TERMINAL BOARD (FUSE)

26 HWRAS-25YH4 939 1 LOW COVER

27 HWRAS-25YH4 917 1 TERMINAL BOARD (2P)

PART N0.RAS-14KH2

NO. Q’TY / UNIT PARTS NAME

0285E (08/10/14KH2) 47-71 24/11/05, 10:18 AM66

– 67 –

7

10

9

11

5

4

15 14

17

18

12

16

6

50

30

31

52

5113

3

2

PARTS LIST AND DIAGRAM

INDOOR UNIT MODEL : RAC-08KH2 / RAC-10KH2

53

0285E (08/10/14KH2) 47-71 24/11/05, 10:18 AM67

– 68 –

MODEL RAC-08KH2

2 PMRAC-07GH4 907 1 STRAINER (CAPILLARY)

3 PMRAC-07GH4 908 1 STRAINER (CONDENSER)

4 PMRAC-05CV 901 1 FAN MOTOR SUPPORT

5 PMRAC-10C8 908 1 FAN MOTOR

6 PMRAC-25CNH2 902 1 PROPELLER FAN

7 PMRAC-07CH2 901 1 CABINET

9 PMRAC-05CV 906 1 SIDE PLATE (R)

10 PMRAC-05CV 907 1 SIDE PLATE (L)

11 PMRAC-05CV 908 1 HANDLE

12 PMRAC-09CHA1 903 1 D-GRILL

13 PMRAC-07GH4 901 1 COMPRESSOR

14 PMRA-08GF 904 3 COMPRESSOR RUBBER

15 PMRA-08GF 905 3 COMPRESSOR NUT

16 PMRAC-07GH4 902 1 CONDENSER

17 PMRAC-07GH4 904 1 2S-VALVE

18 PMRAC-07GH4 905 1 3S-VALVE

30 PMRAC-05CV 915 1 FAN MOTOR CAPACITOR

31 PMRAC-51CHA1 903 1 TERMINAL BOARD (4P)

50 PMRAC-07GH4 906 1 COMPRESSOR CAPACITOR

51 PMRAC-260GHA 901 1 REVERSING VALVE

52 PMRAC-260GHA 902 1 COIL (REVERSING VALVE)

53 PMRAC-07GH4 909 1 OVERLOAD PROTECTOR

PART N0.RAC-08KH2

NO. Q’TY / UNIT PARTS NAME

0285E (08/10/14KH2) 47-71 24/11/05, 10:18 AM68

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MODEL RAC-10KH2

1 PMRAC-09GH4 904 1 CHECKVALVE

2 PMRAC-07GH4 907 1 STRAINER (CAPILLARY)

3 PMRAC-09GH4 905 1 STRAINER (CONDENSER)

4 PMRAC-05CV 901 1 FAN MOTOR SUPPORT

5 PMRAC-10C7 903 1 FAN MOTOR

6 PMRAC-25CNH2 902 1 PROPELLER FAN

7 PMRAC-09GH4 907 1 CABINET

9 PMRAC-05CV 906 1 SIDE PLATE (R)

10 PMRAC-05CV 907 1 SIDE PLATE (L)

11 PMRAC-05CV 908 1 HANDLE

12 PMRAC-09CHA1 903 1 D-GRILL

13 PMRAC-09GH4 901 1 COMPRESSOR

14 PMRA-08GF 904 3 COMPRESSOR RUBBER

15 PMRA-08GF 905 3 COMPRESSOR NUT

16 PMRAC-09GH4 902 1 CONDENSER

17 PMRAC-07GH4 904 1 2S-VALVE

18 PMRAC-07GH4 905 1 3S-VALVE

30 PMRAC-10C7 904 1 FAN MOTOR CAPACITOR

31 PMRAS-51CHA1 903 2 TERMINAL BOARD (4P)

50 PMRAC-10KH 901 1 COMPRESSOR CAPACITOR

51 PMRAC-260GHA 901 1 REVERSING VALVE

52 PMRAC-260GHA 902 1 COIL (REVERSING VALVE)

53 PMRAC-09GH4 906 1 OVERLOAD PROTECTOR

PART N0.RAC-10KH2

NO. Q’TY / UNIT PARTS NAME

0285E (08/10/14KH2) 47-71 24/11/05, 10:18 AM69

– 70 –

5

4

8

9

157

6

18

14 16

13

10

1112

22

3

123

20

2421

2

53

PARTS LIST AND DIAGRAM

OUTDOOR UNIT MODEL : RAC-14KH2

0285E (08/10/14KH2) 47-71 24/11/05, 10:18 AM70

– 71 –

MODEL RAC-14KH2

1 KPNT1 001 3 PUSH NUT

2 PMRAC-14GH4 901 1 COMPRESSOR

3 RAC-2226HV 805 3 COMPRESSOR RUBBER

4 PMRAC-25NH4 904 1 VALVE (2S)

5 PMRAC-25NH4 905 1 VALVE (3S)

6 PMRAC-25NH4 901 1 CONDENSOR

7 PMRAC-51CA1 905 1 FAN MOTOR SUPPORT

8 PMRAC-18C7 901 1 FAN MOTOR

9 PMRAC-25CNH2 902 1 PROPELLER FAN

10 PMRAC-51CHA1 903 1 TERMINAL BOARD (4P)

11 PMRAC-10KH 901 1 COMPRESSOR CAPACITOR

12 PMRAC-10C7 904 1 FAN MOTOR CAPACITOR

13 PMRAC-14GH4 902 1 HANDLE

14 PMRAC-51CA1 901 1 CABINET

15 PMRAC-09CHA1 903 1 D-GRILL

16 PMRAC-14GH4 905 1 SIDE PLATE (R)

18 PMRAC-51CA1 909 1 TOP COVER

21 PMRAC-260GHA 901 1 REVERSING VALVE

22 PMRAC-14GH4 903 1 STRAINER (CAPILLARY)

23 PMRAC-14GH4 904 1 STRAINER (CONDENSOR)

24 PMRAC-09GH4 904 1 CHECKVALVE

53 PMRAC-14GH4 906 1 OVERLOAD PROTECTOR

20 PMRAC-18GH4 906 1 COIL (REVERSING VALVE)

PART N0.RAC-14KH2

NO. Q’TY / UNIT PARTS NAME

0285E (08/10/14KH2) 47-71 24/11/05, 10:18 AM71

HITACHI

PM NO. 0285E

Printed in Malaysia

RAS-08KH2 / RAC-08KH2RAS-10KH2 / RAC-10KH2RAS-14KH2 / RAC-14KH2

0285E (08/10/14KH2) cover 24/11/05, 10:20 AM2