Drying Tumbler Troubleshooting Manual

www.alliancelaundry.com

Trou

blesh

ooting

Part No. 70291301R3December 2016

Tumble Dryers30 Pound Stack

Through Serial No. 0602004143

Refer to Page 5 for Model Numbers

START

25C

HIGHTEMP

MEDTEMPLOWTEMP

NOHEAT

1

2

3

SELECTTEMP

INSERTCOIN

PUSHSTART

1

2

3

SELECTTEMP

INSERTCOIN

PUSHSTART

START

25C

HIGHTEMP

MEDTEMPLOWTEMP

NOHEAT

T464PZ3A

© Copyright 2016, Alliance Laundry Systems LLC

All rights reserved. No part of the contents of this book may be reproduced or transmitted in any form or by any means without the expressed written consent of the publisher.

70291301 1© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT

Table of Contents

Section 1 – Safety Information ...............................................................5Locating An Authorized Service Person ...............................................6Safety Warnings and Decals..................................................................7Safety Precautions for Servicing Tumble Dryers ..................................7

Section 2 – Introduction ..........................................................................8Model Identification ..............................................................................8Serial Plate Location..............................................................................9Customer Service...................................................................................9Wiring Diagram.....................................................................................9How A Tumble Dryer Works ..............................................................10

Section 3 – Troubleshooting..................................................................111. Tumble Dryer Does Not Start .....................................................122. Motor Does Not Start..................................................................133. Motor Overload Protector Cycles Repeatedly ............................144. Motor Runs But Cylinder Does Not Turn...................................155. Motor Does Not Stop ..................................................................166. Burner Does Not Ignite ...............................................................177. Burner Ignites and Goes Out Repeatedly....................................208. Burner Does Not Shut Off ..........................................................219. Clothes Do Not Dry ....................................................................22

10. Tumble Dryer Overheating .........................................................2411. Burner Not Burning Properly......................................................2512. Loading Door Opens During Operation......................................2613. Cylinder Continues to Spin with Door Open ..............................2714. Coin Does Not Fall into Coin Vault or Coin Drop Sensor

Does Not Register That Coin Has Been Entered ........................28

Section 4 – Adjustments ........................................................................3115. Troubleshooting and Cleaning Coin Drop ..................................3116. Troubleshooting Coin Drop ........................................................3117. Cleaning Coin Drop ....................................................................31

Section 5 – Electronic Control Troubleshooting.................................3518. Theory of Operation of Instant Electronic Ignition ....................3519. Cannot Perform Infrared (IR) Communication...........................3620. Coins Ignored When Entered......................................................3721. Control Display – Door Open Light “On” ..................................3822. Control Display – “door” Error on 25, 30, Stacked 30 and

35 Pound Tumble Dryers with 24 Volt EDC Controls ...............3923. Control Display – No Visible Display – OPL Microprocessor

Models.........................................................................................4024. Control Display – No Visible Display – Power On....................4125. Will Not Start – Electric – Manual Timer...................................4226. Will Not Start – Electric – Rotary Coin Drop.............................4327. Will Not Start – Gas – Manual Timer.........................................4528. Will Not Start – Gas – Rotary Coin Drop...................................46


29. Will Not Start – Steam – Manual Timer .....................................4830. Will Not Start – Steam – Rotary Coin Drop ...............................4931. Will Not Start/Continue Running – EDC Control ......................5132. Will Not Start/Continue Running – OPL Microprocessor

Control ........................................................................................5433. Will Not Run – Electric – Manual Timer ...................................5734. Will Not Run – Electric – Rotary Coin Drop..............................6035. Will Not Run – Gas – Manual Timer..........................................6336. Will Not Run – Gas – Rotary Coin Drop....................................6537. Will Not Run – Steam – Manual Timer......................................6738. Will Not Run – Steam – Rotary Coin Drop ................................6939. Will Not Heat – Electric – Manual Timer...................................7140. Will Not Heat – Electric..............................................................7341. Will Not Heat – Electric – Rotary Coin Drop (With and

Without Time Delay Board) .......................................................7542. Will Not Heat – Electric/Gas – OPL Microprocessor.................7743. Will Not Heat – Gas – EDC Models...........................................8044. Will Not Heat – Gas – Manual Timer.........................................8245. Will Not Heat – Gas – Rotary Coin Drop...................................8446. Will Not Heat – Steam – EDC Models .......................................8647. Will Not Heat – Steam – Manual Timer .....................................8848. Will Not Heat – Steam – OPL Microprocessor ..........................9049. Will Not Heat – Steam – Rotary Coin Drop ...............................93

Section 6 – Micro Display Control Troubleshooting ..........................9550. Coins Ignored When Entered......................................................9551. Control Has No Display..............................................................9652. Door Open Indicator ...................................................................9853. Motor Will Not Start/Run .........................................................10054. Unit Will Not Heat – Gas..........................................................10455. Unit Will Not Heat – Steam......................................................10756. Unit Will Not Heat – Electric ...................................................11057. Error Codes ...............................................................................113Gas ModelsSchematic ........................................................................................114Connection Diagram .......................................................................115

Steam ModelsSchematic ........................................................................................116Connection Diagram .......................................................................117

Electric ModelsSchematic ........................................................................................118Connection Diagram .......................................................................119

Section 7 – NetMaster Troubleshooting ............................................12058. No IR Communication ..............................................................12059. Coins Ignored When Entered....................................................12160. Control Has No Display............................................................12261. Door Open Indicator .................................................................12562. Motor Will Not Start/Run .........................................................128


63. Unit Will Not Heat – Gas..........................................................13464. Unit Will Not Heat – Steam......................................................13865. Unit Will Not Heat – Electric ...................................................142


Notes


Section 1Safety Information

Throughout this manual and on machine decals, you will find precautionary statements (“CAUTION”, “WARNING”, and “DANGER”) followed by specific instructions. These precautions are intended for the personal safety of the operator, user, servicer, and those maintaining the machine.

Additional precautionary statements (“IMPORTANT” and “NOTE”) are followed by specific instructions.

IMPORTANT: The word “IMPORTANT” is used to inform the reader of specific procedures where minor machine damage will occur if the procedure is not followed.

NOTE: The word “NOTE” is used to communicate installation, operation, maintenance or servicing information that is important but not hazard related.

In the interest of safety, some general precautions relating to the operation of this machine follow.

Danger indicates an imminently hazardous situation that, if not avoided, will cause severe personal injury or death.

DANGER

Warning indicates a hazardous situation that, if not avoided, could cause severe personal injury or death.

WARNING

Caution indicates a hazardous situation that, if not avoided, may cause minor or moderate personal injury or property damage.

CAUTION

• Failure to install, maintain and/or operate this product according to the manufacturer’s instructions may result in conditions which can produce serious injury, death and/or property damage.

• Do not repair or replace any part of the product or attempt any servicing unless specifically recommended or published in this Service Manual and unless you understand and have the skills to carry out the servicing.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the product is properly grounded and to reduce the risk of fire, electric shock, serious injury or death.

W006R2

WARNING


Safety Information

IMPORTANT INFORMATION: During the lifetime of a tumble dryer, it may require service. The information contained in this manual was written and is intended for use by qualified service technicians who are familiar with the safety procedures required in the repair of a tumble dryer, and who are equipped with the proper tools and testing equipment.

NOTE: The WARNING and IMPORTANT instructions appearing in this manual are not meant to cover all possible conditions and situations that may occur. It must be understood that common sense, caution and carefulness are factors which CANNOT be built into this tumble dryer. These factors MUST BE supplied by the person(s) installing, maintaining or operating the tumble dryer.

Always contact your dealer, distributor, service agent or the manufacturer on any problems or conditions you do not understand.

Locating An Authorized Service Person

Alliance Laundry Systems is not responsible for personal injury or property damage resulting from improper service. Review all service information before beginning repairs.

Warranty service must be performed by an authorized technician, using authorized factory parts. If service is required after the warranty expires, Alliance Laundry Systems also recommends contacting an authorized technician and using authorized factory parts.

To reduce the risk of electric shock, fire, explosion, serious injury or death:• Disconnect electric power to the tumbler

before servicing.• Never start the tumbler with any guards/

panels removed.• Whenever ground wires are removed

during servicing, these ground wires must be reconnected to ensure that the tumbler is properly grounded.

W240

WARNING

Repairs that are made to your products by unqualified persons can result in hazards due to improper assembly or adjustments subjecting you or the inexperienced person making such repairs to the risk of serious injury, electrical shock or death.

W007

WARNING

If you or an unqualified person perform service on your product, you must assume the responsibility for any personal injury or property damage which may result. The manufacturer will not be responsible for any injury or property damage arising from improper service and/or service procedures.

W008

CAUTION


Safety Information

Safety Warnings and DecalsSAFETY WARNINGS and decals have been provided in key locations to remind you of important precautions for the safe operation and maintenance of your tumble dryer. Please take the time to review these warnings before proceeding with service work.

All decals have been designed and applied to withstand washing and cleaning. Decals should be checked periodically to be sure they have not been damaged, removed, or painted.

Safety Precautions for Servicing Tumble Dryers

Prior to servicing tumble dryer:

• Disconnect electrical service and “lockout” to prevent unintentional connection.

• Shut off supply gas valve.

• Allow machine to cool prior to servicing.

After servicing tumble dryer:

• Control/access panels must be reinstalled.

• Motor/drive/belt guards must be reinstalled.

• Contactor/junction/accessory box covers must be reinstalled.

• Use a non-corrosive leak detection solution to check all pipe connections for gas leaks. DO NOT USE AN OPEN FLAME TO CHECK FOR GAS LEAKS!

• The loading door switch, lint door switch and airflow switch must be operating properly.


Section 2Introduction

Model IdentificationInformation in this manual is applicable to these models:

Includes models with the following control suffixes:

Gas Steam Electric

T30

CHD30STG2-CAT30LCHD30STG2-CAT30NCHD30STG2-CTT30LCHD30STG2-CTT30NCHD30STG2-CUT30LCHD30STG2-CUT30NDRST30G2-BAT30LDRST30G2-BAT30NDRST30G2-BTT30LDRST30G2-BTT30NDRST30G2-BUT30LDRST30G2-BUT30NHAT30LHAT30NHTT30D

HTT30LHTT30NHUT30LHUT30NIPD30STG2-ITT30LIPD30STG2-ITT30NLTT30LLTT30NMTT30NNTT30NPAT30LPAT30NPTT30LPTT30N

PUT30LPUT30NSAT30LSAT30NSTT30LSTT30NSUT30LSUT30NUAT30LUAT30NUTT30LUTT30NUUT30LUUT30N

CHD30STS2-CTT30SCHD30STS2-CUT30SDRST30S2-BTT30SDRST30S2-BUT30SHTT30SHUT30SIPD30STS2-ITT30SPTT30SPUT30SSTT30SSUT30SUTT30SUUT30S

CHD30STE2-CTT30ECHD30STE2-CUT30EDRST30E2-BTT30EDRST30E2-BUT30EHTT30EHUT30EIPD30STE2-ITT30EPTT30EPUT30ESTT30ESUT30EUTT30EUUT30E

3O – DX4 OPL CX – prep for coin drop NX – NetMaster coin ready3V – DX4 vended CY – prep for card NY – NetMaster card ready3X – DX4 prep for coin EC – EDC electronic coin OM – OPL microBC – basic electronic, coin EX – EDC coin ready ZC – NetMaster coin networkBL – basic electronic, central pay EY – EDC card ready ZR – NetMaster card networkBX – basic electronic, prep for coin MT – manual timer ZX – NetMaster coin ready networkBY – basic electronic, prep for card NC – NetMaster coin ZY – NetMaster card ready networkCD – rotary coin drop NR – NetMaster card


Introduction

Serial Plate LocationWhen calling or writing for information about your product, be sure to mention model and serial numbers. Model and serial numbers are found on the serial plate on the rear of the machine and inside the upper loading door hinge.

Customer ServiceIf literature or replacement parts are required, contact the source from which the machine was purchased or contact Alliance Laundry Systems at (920) 748-3950 for the name and address of the nearest authorized parts distributor.

For technical assistance, call (920) 748-3121.

Wiring DiagramThe wiring diagram is located inside the contactor or junction box.

Models starting Serial No. 0309____ or later will have the wiring diagram part number in the lower portion of the electrical data on the serial plate.

MODEL NO:

SERIAL NO:

V-/ HERTZ/ PHASE

AMPS, WIRES + GROUND

TOTAL kW, MOTOR kW

REQ'D CIRCUIT BREAKER: AMPS

FAN OUTPUT:

@MAX "WC STATIC PRESSURE

EQUIPPED FOR: GAS@ "WC MANIFOLD PRESS.MIN SUPPLYPRESSURE:

ANS 72152CLOTHES DRYER.VOL II

CGA 72

AMPLFIEDRER

TESTED FOR NATURAL & LIQUID PETROLEUM GASSES

MAX SUPPLYPRESSURE:"WC. "WC.

INPUT: BTU/hr @ BTU/cu.ft.

MADE IN U.S.A./FABRIQUE AU ETATS UNIS/FABRICADO EN LOS ESTADOS UNIDOS 70051001

TMB1961P


Introduction

How A Tumble Dryer WorksA tumble dryer uses heated air to dry loads of laundry.

When the motor is started, the exhaust fan pulls room temperature air in through the air intake at the rear of the tumble dryer and over the heat source (burner flame for gas, heating element for electric, and coil for steam).

The heated air moves into the cylinder, where it is circulated through the wet load by the tumbling action of the cylinder.

The air then passes through the lint filter, exhaust fan, and is vented to the outdoors.

1

2

3

T002CE3A

1

2

3


Section 3Troubleshooting

IMPORTANT: Refer to wiring diagram for aid in testing tumble dryer components.

To reduce the risk of electric shock, fire, explosion, serious injury or death:• Disconnect electric power to the tumble dryer before servicing.• Close gas shut-off valve to gas tumble dryer before servicing.• Close steam valve to steam tumble dryer before servicing.• Never start the tumble dryer with any guards/panels removed.• Whenever ground wires are removed during servicing, these ground wires must be

reconnected to ensure that the tumble dryer is properly grounded.W002R1

WARNING


Troubleshooting

1. Tumble Dryer Does Not Start

Tumbler Does Not Start

Is motor relay

inoperative?

Test relay and replace if

necessary.

Yes

Isloading door

open?

No

Close loading door

completely.

Isdrying timer inan off position (Manual Timer

Models)?

Yes Turn drying timer on.

Check that proper amount

of coins are inserted.

Is thePUSH-TO-

START button not properly

activated (Manual Timer

Models)?

Press andhold PUSH-TO-START button

for three seconds.

Is theelectrical power

off or circuit breaker or fuse

blown?

Close and lock lint drawer.

Check fuse(in junction box) and replace if

necessary.

Is there a blown fuse on tumbler?

Test coin drop and replace if inoperative.

YesIs coin drop inoperative?

Is there an incorrect

amount of coins inserted into coin drop?

No

No

Yes

No

Yes

Check power supply, or

replace fuses.

No

Is the lint drawer open?

No

Yes

No

Yes

Yes

TMB2207S

Yes

No


Troubleshooting

2. Motor Does Not Start

Motor Does Not Start

Is theelectrical power

off or circuit breaker fuse

blown?

No

Is theloading doorswitch or lint

drawer switch not closed or switch

inoperative?

Is thedoor switch improperly adjusted?

No

Check power supply, or replace

fuses.

Yes

Close door, drawer or test

switch and replace if

inoperative.

Yes

Refer to Installation Manual for door

switch adjustment.

Yes

Is the start circuit not complete?

YesPress and hold

PUSH-TO-START button for three

seconds.

Is the motor inoperative?

Yes Have motor tested and replace if inoperative.

No

Is thecylinder or

cylinder motor binding?

No

Refer to wiring diagram.

Yes

Replace fan or motor assembly.

Yes

Replace cylinder, bearing, rollers, or motor assembly.

Yes

Is the transformer inoperative?

Yes Test and replace if necessary.

Is themotor relay inoperative?

Yes Test relay and replace if inoperative.

Isthe fan or fan

motor binding?

Is therebroken, loose,

or incorrectwiring?

No

No

No

Is theairflow switch inoperative

(Hyrid Timer Models)?

Yes Test switch, replace or adjust

as required.

No

TMB2208S

No

No


Troubleshooting

3. Motor Overload Protector Cycles Repeatedly

TMB1904S

Motor Overload Protector Cycles

Repeatedly

Is voltage correct?

Refer to Installation Manual for electrical

requirements.

Yes

Is clothes load too large?

No

Remove part of load.

Yes

Is clothes cylinder binding?

Check cylinder for binding.

Is wiring adequate?

No

Yes

No

Check with local power company to ensure that

wiring is adequate.

Yes

Is make-up air adequate?

Refer to Installation Manual for make-up air

requirements.

No

Yes

Is there lint buildup around tumbler or poor maintenance?

Clean lint accumulation

on and around the motors.

No

Yes

Is there broken, loose or incorrect

wiring?

Refer to wiring diagram.No

Yes


Troubleshooting

4. Motor Runs But Cylinder Does Not Turn

Motor Runs But Cylinder

Does Not Turn

Is cylinder belt

broken?

Replace cylinder belt.

Is cylinder binding?

Check cylinder for binding.

Yes

No

Yes

TMB1905S


Troubleshooting

5. Motor Does Not Stop

Motor Does

Not Stop

Is the door

switch or lint

drawer switch

not working

properly?

Test switches

and replace if

inoperative.

Is coin drop

not working

properly?

Test coin drop

and replace if

inoperative.

Is wiring

incorrect?

Refer to wiring

diagram.

Is electronic

control

inoperative?

Replace

electronic

control.

Is motor

relay

inoperative?

Test relay and

replace if

inoperative.

Yes

No

Yes

No

Yes

No

Yes

No

Yes

TMB1906S


Troubleshooting

6. Burner Does Not Ignite

Burner Does Not Ignite

Is therean improper or

inadequate exhaust system?

No

Are thereblown fuses or

tripped circuit breakers in external electric

supply line?

Isdrying

selector in the“Cool Down”

portion ofcycle?

No

Refer to Installation Manual for

exhaust system requirements.

Yes

Check fuses or circuit breaker.

Yes

Reset switch on microprocessor.

Yes

Isthe cabinet thermostat

inoperative?

Yes Test thermostat and replace if inoperative.

Isthere an

insufficient gas supply?

Yes

Open partially closed gas shut-off valve, or

correct low gas pressure. Check

manifold pressure and adjust to

pressure specified on serial plate. If

pressure cannot be obtained, have your local gas company

check main gas pressure.

No

Is there inadequate

ductwork and make-up

air?

No

Tumbler is equipped for type of gas

specified on serial plate. If orifices are different from that specified on serial plate, obtain and

install correct orifices.

Yes

Clean lint compartment. Check

damper for lint accumulation. Check

ductwork for lint buildup.

Yes

Refer to Installation Manual to ensure that ductwork and

make-up air openings are sized

accurately.

Yes

Is there lint

buildup?

Are the orifices

incorrect?

TMB2209S-a

No

Continued on next page

Is stove limit

thermostat 1 inoperative?

Test thermostat 1 and replace if inoperative.

No

Yes

Is stove limit



No

No

No

No

Yes


Troubleshooting

6. Burner Does Not Ignite (continued)

Continued from previous page

Is there an

improper igniter to burner tabclearance?

Are valve coils inoperative?

No

Clearance should be

0.110 - 0.140 inch (2.79 - 3.55

mm).

Yes

Check valve coils and replace if

necessary.

Yes

Isthere a blown

fuse on tumbler?

Yes

Check fuse (located in

control box) and replace if

necessary.

Isgas shut-off valve in the

closedposition?

Yes Open shut-off valve.

Ismotor switch inoperative?

No

Replace IEI control.

Yes

Replace motor.Yes

Is the IEI control

inoperative?

TMB2209S-b

Yes Connect ground wire to ground terminal.

Is theground wire from Instant

Electronic Ignition (IEI) board not connected to

groundterminal?

No

Isthere broken,

loose or incorrectwiring?

Yes Referto wiringdiagram.

Is the lint drawer not

closed properly?

YesUnlock and open lint drawer. Close drawer ensuring a tight fit, then lock.

Is theairflow switch inoperative?

Test switchand replace

if inoperative.

Yes

No

No

No

No

No

No


No


Troubleshooting

6. Burner Does Not Ignite (continued)


Test and replace as needed.

Iswrong

transformer configuration

harnessinstalled?

Yes

Check incoming voltage and install

correct configuration

harness.

TMB2209S-c

Is therean inoperative

microprocessor or hybrid timer?

Yes

No

Is Instant Electronic

Ignition (IEI) control in safety

lockout?

Reset IEI control by opening and closing loading door. (Non-

CE models only)

Reset IEI by pressing reset

button on back of unit. (CE models

only)

No

Yes


Troubleshooting

7. Burner Ignites and Goes Out Repeatedly

Burner Ignites and Goes Out Repeatedly

Is there insufficient gas

pressure?

Check gas supply and pressure.

Yes

Is the cabinet thermostat

inoperative?

Yes Test thermostat and replace if inoperative.

Is theexhaust system

improper or inadequate?

YesRefer to

Installation Manual for exhaust system

requirements.

No

Doestumbler have

improper orifices?

Yes

Tumbler is equipped for type of gas specified on

serial plate. If orifices are different from that

specified on serial plate, obtain and install correct orifices.

No

Isthere excessiveigniter to burner

clearance?

YesClearance should be

0.110 - 0.140 inch (2.79 - 3.55 mm).

Isthere

inadequate make-up air?

YesRefer to

Installation Manual for make-up air requirements.

No

Is the thermistor

inoperative?

Yes

No

Replace thermistor.

Is the control heater relay

malfunctioning?

YesReplace control.

No

Is there broken, loose or

incorrect wiring?

Yes Refer to wiring diagram.

No

Yes Repair damper to working order.

Are the back draft dampers

locked in closed position?

No

TMB1908S

No

Is stove limit



No

Yes

Is stove limit



No

No

Yes


Troubleshooting

8. Burner Does Not Shut Off

Burner Does Not Shut Off

Are there impurities on gas

valve seat, preventing valve

from closing?

Replace gas valve.

Is wiring correct?


Is control heater relay

malfunctioning?

Replace control.

Yes

No

Yes

No

Yes

TMB1909S


Troubleshooting

9. Clothes Do Not Dry

Clothes Do Not Dry

Is thereenough heating

time allocated for the load?

Yes

Is the burner igniting?

Start cycle again with enough time to

dry load.

No

Refer toBurner Does Not Ignite flowchart.

No

Remove excess water.

Isthe clothes

load too large?

Yes

Remove part of load. Maximum

load is 30 pound dry weight (cotton load) for 30 pound

Tumbler, etc.

Is theexhaust system

improper or inadequate?

YesRefer to Installation Manual for exhaust system equirements.

No

Isthe voltage incorrect?

No

Refer toBurner Ignites and Goes Out

Repeatedly flowchart.

Yes

Set selectorfor highersetting.

Yes

Refer to Installation Manual for electrical

requirements.

Yes

Is there inadequate make-up

air?

Yes Refer to Installation Manual for make-up

air requirements.

Is theexhaust duct to

the outside blocked?

Yes Clean duct to remove blockage.

Isthe drying selector

improperly set?

Doesthe burner ignite

and go out repeatedly?

No

No

No

TMB2210S-a

No


Is theretoo much water in

articles beingdried?

Yes

No

Yes

No


Troubleshooting

9. Clothes Do Not Dry (continued)


Is the lint screen clogged?

Is the thermistor inoperative?

No

Clean lint screen.Yes

Replace thermistor.Yes

Is the exhaust damper binding?

Yes Adjust damper so it turns freely.

Is thecylinder speed

too fast?

YesCheck belt is not riding on outer

diameter of motor pulley.

TMB2210S-b

No

No


Troubleshooting

10. Tumble Dryer Overheating

Tumbler

Overheating

Does

tumbler

have incorrect

main burner

orifices?

No

Is gas

pressure too high or

low?

Is the

make-up air

inadequate?

No

Obtain and install

correct orifices.Yes

Adjust gas pressure

as specified on

serial plate.

Yes

Refer to Installation

Manual for make-up

air requirements.

Yes

Is there

lint buildup?

Yes

Clean lint

compartment. Check

damper for lint

accumulation. Check

ductwork for lint

buildup.

Is the

exhaust system

restricted or

inadequate?

Yes

Remove obstruction

or lint build up from

exhaust ductwork.

Refer to Installation

Manual for exhaust

system

requirements.

No

Is the

control heater

relay

malfunctioning?

No

Check wiring to

ensure thermistor

is connected.

Replace

thermistor if

necessary.

Remove lint build-

up on thermistor.

Yes

Adjust damper

so it turns

freely.

Yes

Replace control.Yes

Are

the safety covers

missing, allowing

cool air to enter

tumbler?

YesReplace covers.

Is the

lint screen

clogged with

fabric

softener?

Yes Replace lint

screen.

Is the

exhaust

damper

binding?

Is the

thermistor

sensor

inoperative?

No

No

No

TMB1911S

No

No

Are there

holes in cabinets

due to foreign

objects?

Yes Repair/replace

cabinet

components.

No


Troubleshooting

11. Burner Not Burning Properly

Burner Not Burning Properly

Is there lint/dirt in burner tube?

Is the gaspressure too high

or low?

No

Disassembleburner and

blow out lint/dirt.

Yes

Check serial plate on back of

tumbler for correct gas pressure.

Yes

Isthe airflow switch not functioning properly?

Yes Replace airflowswitch.

Is there inadequatemake-up

air?

YesRefer to

Installation Manual for make-up air requirements.

TMB2211S

No

Yes Clean off lint.Is there lint buildup around gas valve

spud?

No

Doesthe tumbler have

incorrectorifices?

Yes

Tumbler is equipped for the type of gas specified on serial plate. If orifices are different from that specified on serial plate, obtain and

install correct orifices.

Is theexhaust duct restricted or

blocked?

Yes Disassemble and clean

exhaust system.

No

No

No


Troubleshooting

12. Loading Door Opens During Operation

Loading Door Opens During

Operation

Is tumbler improperly leveled?

Refer to Installation Manual for leveling

leg adjustment.

Is clothes load too large?

Remove part of load and restart tumbler.

Is loading door strike adjusted

incorrectly?

Refer to Adjustments

Section for strike adjustment.

Yes

No

Yes

No

Yes

TMB1913S

NOTE: All tumble dryer panels must be in place and on the machine for proper operation.


Troubleshooting

13. Cylinder Continues to Spin with Door Open

Cylinder Continues To

Spin With Door Open

Is door switch

inoperative?

Replace door switch.

Yes

TMB2186S

Is motor relay inoperative?

Replace relay in control box.

No

Yes

NOTE: All tumble dryer panels must be in place and on the machine for proper operation.


Troubleshooting

14. Coin Does Not Fall into Coin Vault or Coin Drop Sensor Does Not Register That Coin Has Been Entered

IMPORTANT: Never use oil to correct coin drop problem. Oil residue will prevent coins from rolling properly.

IMPORTANT: Do not bend or damage mechanical parts within coin drop.

Coin Does Not Fall Into Coin Vault or Coin Drop Sensor Does Not

Register That Coin Has Been Entered

Is proper electrical

power supplied to coin drop?

Incorrect electrical connection may

prevent coins from registering in coin drop.


No

Is machine

level?

Machines that are not level may prevent coins from following through required check stages

of drop. Refer to Installation Manualfor instructions on leveling machine.

Is coin drop

clean?

Residue or lint build-up may prevent coins from

following through required check stages

of drop. Clean coin drop.

Yes

No

Yes

No

TMB1915S

Is sensoroperative?

Yes

Replace coin drop sensor.

No


Troubleshooting

Troubleshooting Coin DropIf coin drop is not accepting coins, perform the following:

1. Clean coin drop. Refer to Paragraph 17.2. On electronic coin drops with an old-style

tension spring (shown in Figure 1 and Figure 3), test and replace tension spring using the following instructions.

Remove Coin Drop From Machine1. Disconnect electrical power to machine and drop.2. Remove coin drop from machine.

Test Tension Spring1. Push coin return button to open and close coin

drop cover to clear possible coin jams. Refer to Figure 1.

2. Manually hold down coin drop cover and insert coin. Refer to Figure 2.

3. If coin drop now operates properly, replace tension spring using instructions on following pages.

Replace Tension Spring1. Move tension spring downward until cover catch

is free. Refer to Figure 3.

2. Open cover for coin drop.3. Place a small flathead screwdriver under right

side of tension spring and lift up. Refer to Figure 4.

4. Use screwdriver to move spring approximately 3 mm to left.

5. Lift spring over left tab. Refer to Figure 4.6. Rotate spring clockwise, 40 to 60 degrees, until it

is free from right tabs. Refer to Figure 5.

Figure 1

Figure 2

MIX7B

Coin Drop Cover

Coin Return Button

Tension Spring

MIX6B

Coin Drop Cover

Figure 3

Figure 4

Figure 5

DRY2088N

Cover Catch

Tension Spring

MIX2B

Small Flathead Screwdriver

Right Side of Tension Spring

Left Tab

MIX3B

Tabs

Center Tab


Troubleshooting

7. Use screwdriver to remove spring from center tab. Refer to Figure 5.

8. Lift spring, with attached clip, off drop.9. Remove clip from spring. Refer to Figure 6.

10. Attach clip to new tension spring, Part No. 209/00598/02.

11. Place clip, installed on spring, in slot on coin drop. Refer to Figure 7.

12. Use a small flathead screwdriver to push spring under center tab. Refer to Figure 8.

13. Lift spring gently to place in position under left tab.

14. Push spring to right until it snaps into position. Refer to Figure 4.

15. Close coin drop cover.16. Move tension spring over cover catch. Refer to

Figure 3.

Reinstall Coin Drop Into Machine1. Reinstall coin drop into machine.2. Reconnect electrical power to machine and drop.3. Add a coin to drop to verify that coin drop is

operating properly and that electrical connection is working properly.

Figure 6

Figure 7

MIX4B

Clip

MIX8BSlot

Figure 8

MIX5B

Small Flat Screwdriver

Center Tab

Left Tab


Section 4Adjustments

15. Troubleshooting and Cleaning Coin Drop

When a coin is placed into coin slot, the coin should roll down drop and be heard dropping into coin vault. If coin does not fall into coin vault or if coin drop sensor does not register that coin has been entered, follow troubleshooting instructions below.

16. Troubleshooting Coin DropIs proper electrical power supplied to coin drop? Incorrect electrical connection may prevent coins from registering in coin drop. Refer to wiring diagram and service manual for proper connections.

Is machine level? Machines that are not level may prevent coins from following through required check stages of drop. Refer to Installation Instructions for instructions on leveling machine.

Is coin drop clean? Residue or lint build-up may prevent coins from following through required check stages of drop. Refer to Cleaning Coin Drop instructions below.

IMPORTANT: Never use oil to correct coin drop problems. Oil residue will prevent coins from rolling properly.

IMPORTANT: Do not bend or damage mechanical parts within coin drop.

17. Cleaning Coin DropThe electronic coin drop should be cleaned once a year. Clean the drop more often if it is exposed to high

levels of residue or lint build-up. Follow the instructions below for cleaning the coin drop.

1. Disconnect electrical power to machine and drop.

2. Remove coin drop from machine.

3. Open cover of coin drop. Refer to instructions for your coin drop below.

Coin Drops with Old-Style SpringRefer to Figure 9.

a. Move spring downward until cover catch is free. Refer to Figure 10.

NOTE: Do not lift or overbend the spring in any direction.



WARNING

DRY2088N

1 Spring

Figure 9

DRY2088N

1


Adjustments

b. Open cover for coin drop. Refer to Figure 11.

Coin Drops with New-Style Spring Refer to Figure 12.

Figure 12

c. Open cover of coin drop. Refer to Figure 13.

NOTE: Do not overbend the spring by opening cover too far.

Figure 13

4. Clean the coin path with a soft brush and wipe exposed surfaces with an alcohol moistened cloth. Refer to Figure 14 and Figure 15.

DRY2088N

1 Catch

Figure 10

DRY2089N

1 Cover

Figure 11

DRY2088N

1

1

DRY2404N

1 Spring

DRY2408N

1 Spring

DRY2404N

1

DRY2408N

1


Adjustments

.

5. Clean residue from coin rail with an alcohol moistened cloth. Refer to Figure 16.

6. Clean light sensors with a soft brush or air spray duster. Refer to Figure 17.

7. Close cover for coin drop.

8. Coin Drops with OLD-Style Spring – Move spring back over cover catch.

9. Reinstall coin drop into machine.

10. Reconnect electrical power to machine and drop.

11. Add a coin to drop to verify that coin drop is operating properly and that electrical connection is working properly.

DRY2090N

Figure 14

DRY2405N

Figure 15

DRY2406N

1 Alcohol Moistened Cloth

Figure 16

DRY2090N

OLD-STYLE SPRING COIN DROP

DRY2405N

NEW-STYLE SPRING COIN DROP

1

DRY2407N

1 Light Sensors

Figure 17

11


Adjustments

Notes


Section 5Electronic Control Troubleshooting

18. Theory of Operation of Instant Electronic Ignition

IMPORTANT: The Non-CE Marked Instant Electronic Ignition system will attempt to light the gas by sparking for approximately 12 seconds. If gas ignition does not take place within approximately 12 seconds, the Instant Electronic Ignition control will go into safety lockout and the valve will no longer open until Instant Electronic Ignition control is reset. To reset Instant Electronic Ignition control, remove power from control by opening and closing the tumble dryer door. If condition persists, check that the gas shut-off valve is in “on” position and that the gas service is properly connected.

If condition persists:

a. Check resistance of high tension lead (approximately 1000 ohms/inch), and replace if not within resistance range.

b. Check voltage present at valve.

c. Check that machine is properly grounded.

d. Check the igniter gap (gap should be .110 to .140 inch).

e. Check that burner ports are not blocked or plugged under the igniter.



WARNING


Electronic Control Troubleshooting

19. Cannot Perform Infrared (IR) Communication

T027D

Check the following:

- IR communication disabled by manual programming.

- Is the IR window on the control covered or blocked.

- if needed, change electronic control board.


- low battery on microwand. - is the IR window covered or

blocked on the control. - if needed replace the

electronic control. - is the IR cap properly attached

to the microwand.

Communication sequence checks

out.

Attempt to communicate with

the electronic control from the

microwand.

Aim microwand closer and try again.

Is there a response of any kind from the electronic control?

Does the control respond?

Does the electronic control display E:OF

or -C-?

NO

YES

-C-

E:OF

NO

YES

Single and stacked. Gas and electric heat. Single and three phase

supply.

T027D



20. Coins Ignored When Entered

TMB1822S

Does the display on the EDC control increment

properly?

Is connector H2 firmly seated in its receptacle?

Is the 3 pin connector between coin drop and

control connected correctly?

Are wires exiting coin drop optical sensor cracked or broken?

Exit diagnostic testing and reset

control. (Prompting for vend price)

Reconnect and run diagnostic test

again.

Reconnect and run diagnostic test

again.

Replace coin drop or optic switch.

Replace coin drop or optic switch.

If problem still exists then replace

the EDC control.

Start coin drop diagnostic tests.

YES

NO

YES

YES

NO

YES

NO

NO

Single and stacked units. Gas and electric heat. Single and three

phase voltage.

TMB1822S



21. Control Display – Door Open Light “On”

T028D

Is there voltage at H4-6 on the electronic

control?

Replace electronic control.

Is there power supplied to the unit?

NO

Is there voltage to input of primary fuses?

Is there voltage to output side of the primary fuses?

Is there voltage across terminals 1 & 2 of

transformer primary?

Plug unit in and run it.

Correct wiring between primary fuses and power

supply.

Replace primary fuse(s).

Correct wiring between primary

fuses and transformer.


transformer secondary?

Replace transformer.

Is there voltage at the input of the

secondary fuse?

Is there voltage to output side of

secondary fuse?

Correct wiring between secondary

fuse and transformer.

Replace secondary fuse.

NO

NO

NO

NO

NO

NO

YES

(1)

(6)

(7)

(8)

(9)

(10)

(11)

(2)

(3)

(4)

(5)

YES

YES

YES

YES

YES

YES

Is there voltage to N.O. of door

switch?

With door closed is there voltage to COM of door

switch?

Is there voltage to N.O. of lint drawer

switch?

Is there voltage to COM of lint drawer

switch with lint panel closed?

Check for proper operation replace if

necessary.

Correct wiring between N.O. on lint drawer and COM on

door switch.

Correct wiring between N.O. and

output of secondary fuse.

Check for proper function of door switch replace if

necessary.

Correct wiring between H4-6 of

electronic control and COM of lint drawer

switch.

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO


phase supply.

Reference voltage checks to transformer

neutral.

T028D



22. Control Display – “door” Error on 25, 30, Stacked 30 and 35 Pound Tumble Dryers with 24 Volt EDC Controls

TM

B17

88S

1

2

34

5

7

6

89

1011



23. Control Display – No Visible Display – OPL Microprocessor Models

TMB1823S

Is there voltage supplied to the unit?

Is there voltage to the input side of the primary fuse(s)?

Is there voltage to the output side of the primary fuse(s)?

Is there voltage across the primary side

of the transformer?

Is there voltage across 1 & 4 of transformer

secondary?

Is there voltage across terminals H3-3 &

H3-4 on OPL Micro?

Is there voltage across fuse on OPL Micro?

Connect supply voltage and run unit.

Correct wiring between primary fuse and supply.

Replace primary fuse.

Correct wiring between transformer

and primary fuse.

Replace transformer

Correct wiring between OPL Micro

and transformer secondary.

Replace OPL Micro.

YES

NO

NO

NO

NO

NO

NO

NO

YES

YES

YES

YES

YES

YES

Replace fuse.

Gas, steam and electric heat. Single and three

phase supply.

Note: Reference voltage to supply neutral.

TMB1823S



24. Control Display – No Visible Display – Power On

T025D

Is there voltage across H4-2 & H4-5 on the

EDC control?

Replace EDC Control.


NO

Is there voltage to input of primary fuses?

Is there voltage to output side of the

primary fuses?





supply.







Is there voltage at the input of the

secondary fuse?


secondary fuse?




Correct wiring between H4-2 and

secondary fuse.

YES

NO

NO

NO

NO

NO

NO

NOYES

YES

YES

YES

YES

YES

YES


phase supply.

T025D



25. Will Not Start – Electric – Manual Timer

T050D

Is there power supply voltage coming to the

tumbler?

Connect power and run the cycle.

Is there voltage at the primary side

of the transformer at terminals 1 and 2?

NO

YES

NO Change the primary fuse to the transformer.

Correct wiring between power

supply and transformer.

Still no voltage

YES

there voltage at thesecondary side of the

transformer at terminal2 and 3?

Replace the transformer.

NO

YES

Is there voltage to the output side of the secondary fuse?

Change the secondary fuse.

NO NOCorrect the wiring

between the secondary fuse and

the transformer.

Is there voltage to the N.O. terminal of the

door switch?

YES

NO

Correct the wiring between the door

switch and the secondary fuse.

YES With door closed Is there voltage at COM of the door switch?

NO

Check for proper operation,

replace the door switch if

necessary.

YES Is there voltage to the COM of the lint panel

switch?

NO

Correct wiring between lint panel switch and door

switch.

YES

With lint panel closed is there votlage to

N.O. terminal of the liint panel switch?

NOReplace lint panel switch.

YES Refer to NO MOTOR RUN (run circuit.)

NOTE: White wires are transformer "neutral"

For stacked units.

Correct wiring between upper and

lower pocket.

Manual Timer, with and without time delay board. Single and stacked units. Single and three phase power supply.

T050D

Is



26. Will Not Start – Electric – Rotary Coin Drop

T075D

Coin Drop with and without time delay boards. Single and stacked units. Single and three phase

power supply.


unit?

Connect power to the unit and run

cycle.

NO

YES

Is there voltage at the primary side of the

transformer at terminals 1 & 2?

NO

YES

Is the primary fuse good?

YES


and power supply.

Replace fuse and

run machine.

NO

Is there voltage at the secondary side of the

transformer at terminal 2 and 3?


NO

YES

Is there voltage to the output side of the

secondary fuse?

Is the secondary fuse good?

NO

Replace fuse and

run machine.

NO

YES

Correct wiring between secondary of transformer and

fuse.YES

Is there voltage to N.C. terminal of

switch A on rotary coin drop?

Note: Reference voltage to transformer neutral.

(White wire)

Correct wiring between rotary coin drop and

secondary fuse.

NO

YES

Is there voltage on the COM terminal of switch

A?

Note: The following checks are made with

the vend price satisfied.

Replace switch A.NO

YES

Is there voltage across coinmeter timer

motor?

Correct wiring between

coinmeter timer motor and COM

on switch A.

NO

Does the coinmeter timer motor

advance?

YES

NO

YES

Replace coinmeter timer motor.

Correct wiring between N.O. on door switch and

COM on switch A.

Is there voltage at N.O. terminal of the

door switch?

NO

With the door closed is there

voltage across the door switch?

Check door switch for proper operation, replace if necessary.

Is there voltage to the N.O. terminal of

the lint panel switch?

Correct wiring between N.O. on the lint panel switch and COM of door switch.

With the lint panel closed is there voltage across the lint panel switch?

Check lint panel switch for proper

operation and replace if necessary.

YES

YES

NO

NO

YES

YES

NO

Is the unit equipped with time delay

boards?

YES

NO

Continued on next page at step 1.


Step 3 continuation.

T075D



26. Will Not Start – Electric – Rotary Coin Drop (continued)

T076D

Correct wiring between 2A of start switch and COM of

lint panel switch.

Is there voltage at 2A of the start

switch?

Is there voltage at terminal 7 of the motor relay?

NO

YES

NO

YES

Correct wiring between 7 of

motor relay and COM of lint panel switch.

Refer to NO MOTOR RUN (run circuit).

Is there voltage to H1-2 on TMR1

board?

STEP 1

Correct wiring between H1-2 and output of

secondary fuse.

With vend price satisfied is there

voltage across N.C. & COM of switch A?

NO

YES

YES

NO

Replace switch A.

Is there voltage across the timer motor?

Is there voltage across H1-6 & H1-8 of

TMR1?

Correct wiring between timer

motor and COM on switch A.

NO

YES

Correct wiring between H1-6 and COM on switch A.


TMR1?

NO

YES

Is there voltage to N.O. of door switch?

Replace TMR1.YES

NO

Correct wiring between N.O. of door switch and H1-3 of TMR1.

Continue at step 3 on previous page.

YES

NO

Does coinmeter timer motor advance?

YES

NO Replace timer motor.

STEP 2

Note: Following tests are conducted with vend price satisfied.

Does the unit have single phase or three phase power supply?

Single phase

3 phase

Is there voltage at terminal 14 of the

motor control relay?

Correct wiring to terminal 14 of motor control

relay.

Refer to NO MOTOR RUN (Run

Circuit).

YES

NO

T076D



27. Will Not Start – Gas – Manual Timer

T041D

No motor run (start circuit) Manual Tumblers. Single and stacked unitswith and without time delay.

Is there power supplyvoltage coming to the

tumbler?

Connect powerand run the cycle.

Is there voltageat the primary side of the

transformer atterminals 1 and 2?

NO

YES

NO Change the primaryfuse to thetransformer.

Correct wiringbetween power

supply andtransformer.

Still no voltage

YES

Is there voltagesecondary side of the

at the transformer at terminal2 and 3?

Replace thetransformer.

NO

YES

Is there voltage to theoutput side of thesecondary fuse?

Change thesecondary fuse.


between thesecondary fuse and

the transformer.

Is there voltage to theinput side of the door

switch?

YES

NO

Correct the wiringbetween the door

switch and thesecondary fuse.

YES Is there voltage to theoutput side of the door

switch?

NO

Replace thedoor switch.

YES Is there voltage to theinput side of the lint

panel switch?

NO

Correct wiringbetween lint panelswitch and door

switch.

YES

Is there voltage to theoutput side of the lint

panel switch?

NOReplace lintpanel switch.

YES Refer to NOMOTOR RUN(run circuit).

NOTE: White wires aretransformer "neutral"

For stacked units.

Correct wiringbetween upper and

lower pocket.

T041D



28. Will Not Start – Gas – Rotary Coin Drop

T086D

Single & stacked tumblers

with and without time delay.


unit?


cycle.

NO

YES

Is there voltage at the primary side of the transformer at terminals

1 & 2?

NO

YES


YES


and power supply.

Replace fuse and

run machine.

NO




NO

YES



NO

Replace fuse and

run machine.

NO

YES


fuse.YES




(White wire)Correct wiring

between rotary coin drop and secondary

fuse.

NO

YES


A?



Replace switch A.NO

YES

Is there voltage across coinmeter timer motor?



on switch A.

NO

Does the coinmeter timer motor advance?

YES

NO

YES


Correct wiring between N.O on door switch and

COM on switch A.


door switch?

NO







With the lint panel closed is there

voltage across the lint panel switch?



YES

YES

NO

NO

YES

YES

NO


boards?

YES

NO




T086D



28. Will Not Start – Gas – Rotary Coin Drop (continued)

T087D

Correct wiring between 2A of start switch and COM of

lint panel switch.


switch?


motor relay?

NO

YES

NO

YES

Correct wiring between 7 of motor relay and COM of lint panel switch.

Refer to NO MOTOR RUN(run circuit).


board?

STEP 1


secondary fuse.

With vend price satisfied is there

voltage across N.C. & COM of switch A?

NO

YES

YES

NO

Replace switch A.



TMR1?

Correct wiring between timer motor and COM on switch

A.

NO

YES



TMR1?

NO

YES


Replace TMR1.YES

NO



YES

NO


YES


STEP 2


T087D



29. Will Not Start – Steam – Manual Timer

T016D

Single and stacked units with and without time delay boards.


tumbler?

Connect power and run the cycle.

Is there voltage at the primary side of the

transformer at terminals 1 and 2?

NO

YES

NO Change the primary fuse to the transformer

Correct wiring between power

supply and transformer.

Still no voltage

YES




NO

YES


secondary fuse?

Change the secondary fuse.


between the secondary fuse and

the transformer.


door switch?

YES

NO

Correct the wiring between the door

switch and the secondary fuse

YES Is there voltage to the COM terminal of the

door switch?

NO

Replace the door switch.

YES Is there voltage to the COM terminal of the

lint panel switch?

NO

Correct wiring between lint panel switch and door

switch.

YES


lint panel switch?

NO Replace lint panel switch.

YES Refer to NO MOTOR RUN (run circuit) .

NOTE: White wires are transformer "neutral"

For stacked units.

Correct wiring between upper and

lower pocket.

T016D



30. Will Not Start – Steam – Rotary Coin Drop

T062D

Single and stacked tumblers

with and without time delay.

Is there power supply to the unit?


cycle.

NO

YES

Is there voltage at the primary side of the transformer at terminals

1 & 2?

NO

YES


YES


and power supply.

Replace fuse and

run machine.

NO




NO

YES



NO

Replace fuse and

run machine.

NO

YES


fuse.YES




(White wire)Correct wiring

between rotary coin drop and secondary

fuse.

NO

YES


A?



Replace switch A.NO

YES

Is there voltage across coinmeter timer motor?



on switch A.

NO

Does the coinmeter timer motor advance?

YES

NO

YES


Correct wiring between N.O on door switch and

COM on switch A.


door switch?

NO







With the lint panel closed is there

voltage across the lint panel switch?



YES

YES

NO

NO

YES

YES

NO


boards?

YES

NO

Continued on next page column 1.



T062D



30. Will Not Start – Steam – Rotary Coin Drop (continued)

T063D

Correct wiring between 2A of

start switch and COM of lint panel switch.


switch?


motor relay?

NO

YES

NO

YES

Correct wiring between 7 of

motor relay and COM of lint panel switch.

Refer to NO MOTOR RUN (run circuit).


board?

COLUMN 1


secondary fuse.

With vend price satisfied is

there voltage across N.C. & COM of switch A?

NO

YES

YES

NO

Replace switch A.



TMR1?

Correct wiring between timer motor and COM on switch

A.

NO

YES



TMR1?

NO

YES


Replace TMR1.YES

NO



YES

NO


YES


COLUMN 2


T063D



31. Will Not Start/Continue Running – EDC Control

T029D

Is there voltage at H4-4 on the EDC

control to transformer neutral?


Is there voltage to input of primary fuse(s)?

Is there voltage to output side of the primary fuse(s)?





fuse(s) and power supply.

Replace primary fuse.






Is there voltage at the input of the secondary

fuse?


secondary fuse?




NO

NOYES

YES


With door closed is there voltage to COM

of door switch?

Is there voltage to N.O. of lint drawer switch?

Is there voltage to COM of lint drawer



necessary.


door switch.




necessary.

YES

YES

YES

YES

YES

NO

NO

NO

Correct wiring between H4-1 and COM of lint drawer

switch.

Is there voltage at H4-1 on the EDC control board?

YES

Continued on next page.

Replace EDC Control.

NO

NO

NO

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

Note: Test conducted with vend price satisfied and start button

pressed.

Single and stacked units. Gas, electric and steam heat. Single and

three phase supply.

T029D



31. Will Not Start/Continue Running – EDC Control (continued)

T030D

Is there voltage on B terminal of motor

control relay?

Is there voltage to terminal 5 of the


Is there voltage to terminal 8 of motor

control relay?


the fan motor?

Does the fan motor run?

Is there voltage at terminal 6 of motor

control relay?


control relay?

Correct wiring between B and

H4-4.

Correct wiring between terminal 5 and power supply.

Replace motor control relay.

Correct wiring between fan motor and motor control

relay.

Replace fan motor.

Correct wiring between terminal 6

of motor control relay and supply.


NO

YES

YES

YES

YES

YES

NO

NO

NO

NO

YES

YES

NO

NO

Note: Tests conducted with vend price satisfied and start button

pressed.


Correct wiring between L1, L2 and

power supply.


Is the unit equipped with single phase or three phase power?

Is there supply voltage to L1 and L2 of the motor control relay?

Is there votlage across L1 & T1 and L2 & T2?

Single phase

NO

YES

YES

NO

Three phase.Refer to Note on next page

Three phase.Refer to Note on next page

Is unit equipped with single phase or three phase power supply?

Is there supply voltage to L2 & L3 of motor

control relay?

NO

YES

Is there voltage across terminals L2 & T2 and

L3 & T3?


supply.


YES

NO

Single phase

T030D



31. Will Not Start/Continue Running – EDC Control (continued)

T031D


cylinder motor?

Does the cylinder motor run?

Correct wiring between cylinder motor and motor

control relay.

Replace cylinder motor.

NO

NO

YES

YES

Motors are operational.

Note: For high voltage three phase supply (380 volts or higher), the cylinder and fan motors are supplied by L1, L2, L3 through the motor relay terminals T1, T2, T3. Make the appropriate adjustments when

doing voltage checks.T031D



32. Will Not Start/Continue Running – OPL Microprocessor Control

T099D

Gas, steam and electric heat.

Single and three phase supply.

Is power supplied to unit?

Is there voltage to output of primary

fuse(s)?

Is there voltage across terminals 1 & 2

on primary of transformer?

Is there voltage across terminals 2 & 3

of transformer secondary?

Is there voltage to input of secondary fuse?

Is there voltage to output of secondary

fuse?

Is there voltage to N.O. terminal of door

switch?


of door switch?

Is there voltage to N.O. of lint panel

switch?

Is there voltage to COM of lint panel


Is there voltage at terminal 8 of OPL

Micro?

Change primary fuse.


and primary fuse.





Correct wiring between N.O.

terminal of door switch and

secondary fuse.

Check for proper operation, replace

door switch if necessary.

Correct wiring between N.O. of lint panel switch

and COM of door switch.

Check for proper operation and

replace lint panel switch if necessary.

Correct wiring between terminal 8 of OPL Micro and COM of lint

panel switch.

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO


Reference voltage to supply neutral.

Note: Reference voltage to transformer secondary neutral

terminal 3.

Connect supply and run unit.



T099D



32. Will Not Start/Continue Running – OPL Microprocessor Control (continued)

TMB1824S

Is there voltage at terminal 7 on OPL

Micro?

Is

there voltageacross terminals

B & A of motor control relayfor OM model and terminals

0 & 1 for RMmodels?

voltage at terminal Is there

5 on the motor control relay for OM models and

terminal 2 for RM models?

Is there

voltage acrossterminals 5 & 8 of

the motor control relay for OMmodels and terminals 2

& 4 for RMmodels?

Is there voltage across terminals

1 & 4 of fan motor?


Is there voltage to terminal 6 of motor

control relay?



Replace OPL Micro.

Correct wiring to motor control relay.

Correct wiring between motor

control relay and power supply.


Correct wiring between fan motor and motor control

relay.

Replace fan motor.

Correct wiring between terminal 6 motor control relay and supply

voltage.


YES

YES

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

NO

Tests conducted with cycle selected and start key pad activated.


Does the unit have reversing capabilities?

See cylinder rotation. Either

forward or reverse.

YES

NO



power supply.

Is unit supplied with single phase or three

phase power?

Is there voltage to L1 and L2 of the motor

control relay?

Is there voltage to T1 and T2 of the motor

control relay?

Three phase. Gas and steam. Refer to Note on next page.

Three phase. Gas and steam. Refer to Note on next page.

NO

YES

NO

YES

Single phase

Does the unit have single

phase or three phase supply?


power supply.

NO

YES

Isthere voltage

to T2 and T3 onthe motor control

relay?

Isthere voltage

to L2 and L3 onthe motor control

relay?


NO


NO

Single phase

TMB1824S



32. Will Not Start/Continue Running – OPL Microprocessor Control (continued)

T009D


the cylinder motor?


Correct the wiring between the

cylinder motor and control relay.


YES

YES

NO

NO

Unit operational.

NOTE: For three phase high voltage (380 volts or higher), the cylinder and fan motors are supplied L1, L2, L3 through the motor relay terminals T1, T2, T3. Make

the appropriate voltage checks while doing trouble shooting.

T009D



33. Will Not Run – Electric – Manual Timer

T051D

Is there voltage at terminal C on the

drying timer?

NOCorrect wiring between drying

timer and lint panel switch.

YES

Is there voltage at terminal B on the

drying timer?

NO

YES

Is there voltage across terminals 7 and 8 of

CR1 relay?

Replace drying timer.

NOTE: make sure drying timer is in the "on"

position.

NO

YES

Correct the wiring between CR1 relay and terminal B on

drying timer.

Is there voltage across terminal 3 and 5 of

CR1 relay?

Is there voltage across terminals 2A

& 1A of push to start switch?

Replace CR1 relay.YES

NO

YES

NO

Replace push to start switch.

Is there voltage across COM and N.O. of the airflow switch?

NOTE: This test to be made with push to start

switch pressed in.

YES Adjust the airflow switch or replace if

inoperative.

NOTE: The N.O. contact is closed in the rest position due to the physical

mounting of the switch.

NO

Is the unit equipped with a time delay

board?

NO

Is there voltage across H1-6 & H1-8 on

TMR1?

YES

Correct wiring to TMR1.

NO

YES

Is there voltage across DOB contacts on

TMR2?

Replace time delay board.

YES

NOIs there voltage across terminals H1-4 & H1-8 on TMR2?

YES

NO

CONTINUED ON NEXT

PAGE.

Is there voltage across terminals 5 & 3 on

the CR2 relay?

Replace CR2 relay.

YES


CR2 relay?

NO

Correct wiring between CR2

relay and airflow switch.

NO

YES

Is there voltage across coils B & A of the


Correct wiring between motor control relay and airflow

switch.

NO

**

**

**

Check for proper operation of

airflow switch.

**

**

** Tested with the start switch pressed in.

YES

With and without time delay boards.

Single and stacked units. Single and three phase power supply.

T051D



33. Will Not Run – Electric – Manual Timer (continued)

TMB1825S

Is there voltage across terminals

3 & 5 of the fan motor centrifugal switch with

the fan motorrunning?

Replace fan motor.

YES

Is there voltage across terminal 7 & 4 of

the motor controlrelay?


NO

YES

**

NO

NO

Correct wiring between fan

motor and contact 8 on the motor control relay.


Replace the fan motor.

NO

YES


Is therevoltage at terminal 5

on the motor control relayto supply neutral?

Isthere voltage

across terminals 5 & 3 of the motor control

relay?

Isthere voltage

across terminals 1 & 4 of fan motor?

Correct wiring between terminal 5 and supply voltage.

NO

YES


YES

NO

YES

Note: Only for non time delay machines

Is this a single phase or three phase unit?

Single phase

Three phase voltage across terminals 14 & 13 of motor control relay?


Is there voltage to L1of motor control relay?

Correct wiring between L1 and power supply.

Is there voltage to L2of motor control relay?

Correct wiring between L2 and power supply.

voltage acrossL1 to T1 and L2 toT2 on the motorcontrol relay?


YES

NO

NO

YES

NO

YES

YES

NO


NO

TMB1825S

Is there

Is there



33. Will Not Run – Electric – Manual Timer (continued)

T053D

Is there voltage at terminals 1 & 4 of

the cylinder motor?

Correct wiring between cylinder motor and contact

9 on the motor control relay.

NO


Replace the cylinder motor.

NO

The cylinder and fan motors are

operational.

YES

YES

Is there voltage to terminal 6 on the


voltage across terminal 6 & 9 of the motor control relay?

Correct wiring between terminal

6 and power supply.


NO

YES

YES

NO

Is unit single phase or three phase?

Single phase.

Three phase. Is there voltage to L2 on motor control relay?


control relay and supply.

Is there voltage to L3 on motor control relay?


control relay and supply.

voltage across L2 to T2 and L3 to T3 on the motor

control relay?


NO

YES

YES

NO

YES

NO

T053D

Is thereIs there



34. Will Not Run – Electric – Rotary Coin Drop

T072D

Single and Stack with and without time delay. Single and three phase power.

Is there voltage across terminals 2A & 1A

of push to start switch?

YES

NO


Is there voltage across COM and N.O. of the airflow switch?

YESReplace inoperative

switch or correct airflow vaneoperation.

NOTE: The N.O. contact is closed in the rest position due to the physical mounting

of the switch.

NO


board?

NO

YES


TMR2?


YES


YES

NO


the CR2 relay?

Replace CR2 relay.

YES


CR2 relay?

NO


relay andairflow switch.

NO

YES

Is there voltage across the coil of the motor

control relay?


switch.

NO

**

**

**


airflow switch and check wiring.

**

Is there voltage across terminal 7 & 4 of the motor control relay?


YES

NO

**

**


YES

Is there voltage at terminal 5 on the



terminal 5 and supply

voltage.

NO

YES

**

** Tested with vend price satisfied and with start

switch pressed in.**

Is there voltage to COM of the airflow

switch?

Correct wiring between COM of

airflow switch and 1A on start switch.

YES

NO

Note: Reference voltage to transformer

neutral.

Is unit single phase or three

phase?

Single phase


COLUMN 2.

Continued on next page COLUMN 1.

Three phase Refer to note.

T072D



34. Will Not Run – Electric – Rotary Coin Drop (continued)

T073D

Replace fan motor.

YES


fan motor?

NO





NO

YES



YES

NO

YES




6 and power supply.

NO

NO

YES

For units without time delay boards.

COLUMN 1


Is there voltage across terminal 14 & 13 of motor control relay?

COLUMN 2

Correct wiring between L1, L2

and supply.

Is there voltage to L1 & L2 terminals on motor

control relay?


Is there voltage to T1 & T2 terminals on motor

control relay?

YES

NO

NO

YES

NOYES

Continued on next page COLUMN 1.

Is the machine supplied with single

phase or three phase power?

Single phase

Three phase Refer to Note.

Is there voltage to L2 & L3 terminals on motor control

relay?

Correct wiring between supply

and L2 & L3terminals.

NO

YES

Is there voltage across L2 to T2 and

L3 to T3?

YES

NO




NO

YES

CYLINDER AND FAN MOTORS ARE

OPERATIONAL.

NOTE: For Hi voltage three phase supply (380volts or higher), the cylinder and fan motor are supplied L1, L2, L3 through the motor relay

terminals T1, T2, T3. Make the appropriate adjustments when doing trouble shooting.

T073D

Is therevoltage across

terminals 3 & 5 ofthe fan motor

centrifugal switch withthe fan motor

running?



34. Will Not Run – Electric – Rotary Coin Drop (continued)

T074D


the cylinder motor?



NO



NO


operational.

YES

YES

COLUMN 1



NO

YES Replace motor control relay.

T074D

Is there



35. Will Not Run – Gas – Manual Timer

T042D

No motor run (run circuit). Single and stacked units with and without

time delay boards.

Is there voltage atterminal c on the

drying timer?

NOCorrect wiringbetween drying

timer and lint panelswitch.

YES

Is there voltage atterminal b on the

drying timer?

NO

YES

Is there voltage acrossterminals 7 and 8 of

CR1 relay?

Replace dryingtimer.

NOTE: make sure dryingtimer is in the “on”

position.

NO

YES

Correct the wiringbetween CR1 relayand terminal b on

drying timer.

Is there voltage acrossterminal 3 and 5 of

CR1 relay?

Is there voltageacross terminals 2A

& 1A of push tostart switch?


NO

YES

NO

Replace push tostart switch.

Is there voltage acrossCOM and N.O. ofthe airflow switch?

NOTE: This test to bemade with push to start

switch pressed in.

YES Adjust the airflowswitch or replace if

inoperative.

NOTE: The N.O. contact is closed in the restposition due to the physical mounting

of the switch.

NO

Is the unit equippedwith a time delay

board?

NO

Is there voltage acrossH1-6 & H1-8 on

TMR1?

YES

Correct wiring toTMR1.

NO

YES

Is there voltage acrossDOB contacts on

TMR2?

Replace timedelay board.

YES

NOIs there voltage acrossterminals H1-4 &H1-8 on TMR2?

YES

NO

CONTINUEDON NEXT

PAGE.

Is there voltage acrossterminals 5 & 3 on

the CR2 relay?

Replace CR2relay.

YES

Is there voltage acrossterminals 7 & 8 of

CR2 relay?

NO

Correct wiringbetween CR2


NO

YES

Is there voltage acrosscoils B & A of the


Correct wiringbetween motorcontrol relay

and airflowswitch.

NO

**

**

**

Check for properoperation of

airflow switch.

**

**


YES

T042D



35. Will Not Run – Gas – Manual Timer (continued)

T043D


the cylinder motor?



NO



NO


operational.

YES


the fan motorcentrifugal switch with

the fan motor

Replace fan motor.

YES

YES



YES

NO

**


fan motor?

NO





NO

YES



motor control relay to to supply neutral?

Correct wiring between terminal 5 and supply voltage.

NO

YES



YES

NO

YES


motor control relay and supply neutral?



6 and power supply.


NO

NO

YES

YES

NO


T043D

Is there

running?



36. Will Not Run – Gas – Rotary Coin Drop

T088D

Single and stack with and without time delay.

Is there voltage across terminals 2A & 1A

of push to start switch?

YES

NO


Is there voltage across COM and N.O. of

the airflow switch?


inoperative.

NOTE: The N.O. contact is closed in the rest position due to the physical


NO


board?

NO


TMR1?

YES


NO

YES

Is there voltage across DOB contacts (H1-4and H1-5) on TMR2?


YES


YES

NO

CONTINUED ON NEXT

PAGE.


the CR2 relay?

Replace CR2 relay.

YES


CR2 relay?

NO


relay andairflow switch.

NO

YES

Is there voltage across coils B & A of the



switch.

NO

**

**

**



**



YES

NO

**

**


YES




and supply voltage.

NO

YES

**

** Tested with start switch pressed in.

**


switch?



YES

NO


neutral.

T088D



36. Will Not Run – Gas – Rotary Coin Drop (continued)

T089D


the cylinder motor?

Correct wiring between cylinder motor and contact 9 on the motor control relay.

NO



NO


operational.

YES

Is there voltage across terminals 3 &

5 of the fan motor centrifugal switch with the fan

motor running?

Replace fan motor.

YES

YES


fan motor?

NOCorrect wiring between fan




NO

YES




YES

NO

YES





6 and power supply.


NO

NO

YES

YES

NO

T089D



37. Will Not Run – Steam – Manual Timer

T017D

Single and stacked units with and withouttime delay board.

Is there voltage atterminal C on the

drying timer?

NOCorrect wiringbetween drying

timer and lint panelswitch.

YES

Is there voltage atterminal B on the

drying timer?

NO

YES

Is there voltage acrossterminals 7 and 8 of

CR1 relay?

Replace dryingtimer.

NOTE: Make sure dryingtimer is in the "on"

position.

NO

YES

Correct the wiringbetween CR1 relayand terminal B on

drying timer.

Is there voltage acrossterminal 3 and 5 of

CR1 relay?

Is there voltageacross terminals 2A

& 1A of push tostart switch?


NO

YES

NO

Replace push tostart switch.

Is there voltage acrossCOM and N.O. of

the airflow switch?

NOTE: This test to bemade with push to start

switch pressed in.

YES Adjust the airflowswitch or replace if

inoperative.

NOTE: The N.O. contact is closed inthe rest position due to the physical


NO

Is the unit equippedwith a time delay

board?

NO

Is there voltage acrossH1-6 & H1-8 on

TMR1?

YES

Correct wiring toTMR1.

NO

YES

Is there voltage acrossDOB contacts on

TMR2?

Replace timedelay board.

YES

NOIs there voltage acrossterminals H1-4 &H1-8 on TMR2?

YES

NO

Is there voltage acrossterminals 5 & 3 on

the CR2 relay?

Replace CR2relay..

YES


CR2 relay?

NO

Correct wiringbetween CR2


NO

YES

Is there voltage acrossB & A of the motor

control relay?

Correct wiringbetween motor

control relayand airflow

switch.

NO

**

**

**

Check for properoperation of

airflow switch.

**

**


YES

T017D

CONTINUEDON NEXT

PAGE.



37. Will Not Run – Steam – Manual Timer (continued)

T018D


the cylinder motor?



NO



NO


operational.

YES



the fan motor

Replace fan motor.

YES

YES



YES

NO

**


fan motor?


motor and contact 8 on the motor

control relay.



NO

YES



motor control relay to to supply neutral?


5 and supplyvoltage.

NO

YES



YES

NO

YES


motor control relay and supply neutral?



6 and power supply.


NO

NO

YES

YES

NO


T018D

Is there

running?



38. Will Not Run – Steam – Rotary Coin Drop

T064D

Single and stackwith and without time delay.

Is there voltage across terminals 2A & 1A of push to start

switch?

YES

NO


Is there voltage across COM and N.O. of

the airflow switch?


inoperative.

NOTE: The N.O. contact is closed in the rest position due to the physical mounting

of the switch.

NO


board?

NO


TMR1?

YES


NO

YES


TMR2?


YES


YES

NO

CONTINUED ON NEXT

PAGE.


the CR2 relay?

Replace CR2 relay.

YES


CR2 relay?

NO



NO

YES

Is there voltage across B & A of the motor

control relay?


switch.

NO

**

**

**



**



YES

NO

**

**


YES




and supply voltage.

NO

YES

**

** Tested with start switch pressed in and vend

satisfied.**


switch?



YES

NO


neutral.

T064D



38. Will Not Run – Steam – Rotary Coin Drop (continued)

T065D


the cylinder motor?



NO



NO


operational.

YES



the fan motor

Replace fan motor.

YES

YES


fan motor?





NO

YES




YES

NO

YES





6 and power supply.


NO

NO

YES

YES

NO

Only for units without time delay boards.

T065D

Is there

running?



39. Will Not Heat – Electric – Manual Timer

T054D

NOTE: The following tests are conducted with the heat timer in the "ON" position with the

machine running and calling for heat. Voltage checks are referenced to transformer neutral.


the temp control bd?



YES

NO

voltage atairflow switch

N.C. terminal totransformer

NO Replace inoperative switch or correct

airflow vane operation.

NO

YES

Is there voltage at terminal 6 on CR1 to transformer neutral?

NO Correct wiring between airflow switch and terminal 6 on CR1.

Is there voltage from terminal 4 on CR1 to transformer neutral?

Replace CR1.

YES

NO

YES


Correct wiring between terminal 6 on CR2 to terminal

4 on CR1.

NO

YES


Replace CR2.NO

YES

Correct wiring between CR2 terminal 4 & terminal 1 on temp control

board.

Is the thermistor shorted or open?

NO

YESReplace thermistor.

Replace the temperature control board.

YES

CONTINUED ON NEXT

PAGE

Is unit equipped with time delay board?

NO

YES

Is there voltage to

terminal 3 of fan motor?

NO

YES

Correct wiring between fan motor

terminal 3 and CR1 terminal 4.

Is there voltage at terminal 3 & 5

of fan motor?Replace fan motor.

YES

NO

Correct wiring between motor terminal 5 and temp control

board terminal 1.

With and without time delay board. Single and stacked units. Single and

three phase power supply.

Is temperature selection switch shorted or open?

Replace selection switch.

YES

NO

T054D

Is there

neutral?



39. Will Not Heat – Electric – Manual Timer (continued)

T055D

Is there voltage to the input side of the cabinet limit?

Correct wiring between cabinet limit and temp control board.

YES

NO


cabinet limit?

YES

NO Replace the cabinet limit.

Is there voltage to the input side of the stove

limit?

NO

YES

Correct wiring between stove limit and cabinet limit.

Is there voltage to the output side of the stove

limit?

NO

YES

Replace the stove limit.

Is there voltage across HC1 & HC2

element contactor coils?

YES

NOCorrect wiring

between element contactor coils and

stove limit.

Is there voltage across the elements?

YES

UNIT OPERATIONAL

NO

Check wiring between elements,

contactors and supply. Correct if

necessary.

Note: Voltage checks are referenced to transformer neutral.

Do the elements produce heat?

NO

YES

Replace elements.

T055D



40. Will Not Heat – Electric

T034D

Single and stacked units with single and three phase supply.Note: Tests are conducted with unit running

and calling for heat.

All voltage checks are referenced to transformer neutral.

Correct wiring between FS-2 and COM of lint drawer.

Is there voltage on FS-2 of EDC control?

Is there voltage on FS-1 of

EDC control?


airflow switch and FS-1 of EDC

control.

Is there voltage on COM of airflow

switch?

Check for proper function of airflow switch and replace

if necessary.

Is there voltage at N.C. terminal of airflow switch?


on motor control relay and N.C.

terminal on airflow switch.

Is there voltage on terminal 7 of motor

control relay?



control relay?


3 of fan motor centrifugal switch and terminal 4 of

motor control relay.

Is there voltage on terminal 3 of fan motor centrifugal

switch?

Replace fan motor.Is there voltage at terminal 5 of fan motor centrifugal

switch?

Correct wiring between cabinet limit and terminal

5 of fan motor centrifugal switch.

Is there voltage to the input side of the

cabinet limit?

Replace cabinet limit.

Is there voltage at the output of the cabinet

limit?



limit?

NO

YES

Is the thermistor

operational?

Replace EDC control.Replace

thermistor.

YES

NONO

YES

NO

YES

YES

NO

NO

YES

YES

NO

NO

YES

YES

NO

NO

YES

YES

NO

NO

YES


T034D



40. Will Not Heat – Electric (continued)

T035D



limit?

Correct wiring to the coils of HC1

and HC2.

Is there voltage across coils HC1 & HC2?

Correct wiring between elements

and supply. Replace HC1 and or HC2

if necessary

Is there voltage across the heating elements?

Replace elements.Do the elements produce heat?

Unit operational.

NO

YES

NO

YES

NO

YES

NO

YES

T035D



41. Will Not Heat – Electric – Rotary Coin Drop (With and Without Time Delay Board)

T077D

there voltage acrossacross terminals 1 &

6 of the tempcontrol board?

YES

NO

Is there voltage at airflow switch N.C.

terminal to transformer neutral?

NO Adjust the airflow switch or replace if

inoperative.

NO

YES

Is there voltage at COM on switch B to transformer neutral?

NOCorrect wiring

between airflow switch and COM on

switch B.

Is there voltage from N.C. on switch B to transformer neutral?

Replace switch B.

YES

NO

YES


Correct wiring between terminal 6 on CR2 to terminal N.C. on switch B.

NO

YES


Replace CR2.NO

YES


4 on CR2 & terminal 1 on temp control

board.


NO



YES

CONTINUED ON NEXT

PAGE

Single and stacked tumblers with and without time delay.

Single and three phase units.


board?

NO

YES

Is there voltage on terminal 3 of fan motor to transformer

neutral?

With fan motor running is there voltage

from terminal 5 to transformer neutral?


3 of fan motor and N.C. terminal

on switch B.

NO

YES

Replace fan motor.

Is there voltage on terminal 1 of temp

board to transformer neutral?

NO

YES

NO

YES

Correct wiring between terminal 1 of temp board

to terminal 5 of fan motor.

Power supply to temp control board

is good.



YES

NO

T077D

Is

there voltage acrossacross terminals 5 &

6 of the tempcontrol board?

Is



41. Will Not Heat – Electric – Rotary Coin Drop (With and Without Time Delay Board) (continued)

T078D


cabinet limit?


NO


cabinet limit?

YES



limit?

NO

YES

Correct wiring between stove limit

and cabinet limit.


limit?

NO

YES


Is there voltage across the coils of HC1 &

HC2?

YES

NO Correct the wiring to the coils.

Is there voltage across the elements?

YES

UNIT OPERATIONAL

NO

Check the wiring between elements,

contactors and supply. Correct if

necessary.



NO

YES

Replace elements.

YES

T078D



42. Will Not Heat – Electric/Gas – OPL Microprocessor

T010D



fuse(s)?

there voltage acrossterminals 1 & 2 on

primary oftransformer?





fuse?

Is there voltage to N.O. terminal of door

switch?


of door switch?


switch?



and primary fuse.





Correct wiring between N.O.

terminal of door switch and

secondary fuse.



Correct wiring between N.O. of lint panel switch

and COM of door switch.

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

Continued on next page Column 1.


terminal 3.




Is the thermister operating properly?

Is there voltage at terminal 5 on OPL

Micro?


Replace thermister.

Single and three phase supply.

YES

NO

NO

YES

Reference voltage to transformer neutral

terminal 3.

Test conducted with unit running and calling for heat.


Note: Testing conducted with unit running and calling for heat.

T010D

Is



42. Will Not Heat – Electric/Gas – OPL Microprocessor (continued)

T011D




Micro?



Correct wiring between terminal 8 of OPL Micro

and COM of lint panel switch.

YES

YES

NO

NO

Replace OPL Micro.


6 & 13 on OPL Micro.

Is there voltage to terminal 13 of OPL

Micro?


Micro?

Replace OPL Micro.

NO

NO

YES

YES

Column 1

Correct wiring between COM &

OPL Micro.

Is there voltage at COM of airflow

switch?


replace ifnecessary.

Is there voltage at N.C. terminal ofairflow switch?


7/8 of motor control relay and N.C. of airflow

switch.


there voltage atterminal 4 of motorcontrol relay for OMmodels or terminal 6

for RM

Correct wiring between fan motor centrifugal switch and motor control

relay.

Is there voltage at terminal 3 of fan motor centrifugal

switch?


switch?

Column 2


NO

NO

NO

NO

NO

NO

YES

YES

YES

YES

YES

YES

The following tests are conducted with the unit running


Is the unit supplied with single phase or three

phase power?

single phase

Is there voltage to terminal 14 on motor

control relay?

Is there voltage across terminals 14 & 13 of motor control relay?


14 on motor control relay and N.C. terminal of airflow switch.


Three phase

NO

YES

NO

YES

T011D

Is

models?

there voltage atterminal 7 of motorcontrol relay for OMmodels or terminal 8

for RM

Is

models?



42. Will Not Heat – Electric/Gas – OPL Microprocessor (continued)

T012D

Correct wiring between cabinet

limit and terminal 5 of fan motor

centrifugal switch.

Is there voltage to the input of the cabinet

limit?


Is there voltage to output of cabinet limit?


Is there voltage to input of stove limit?

Replace stove limit.Is there voltage to the

output side of the stove limit?

Correct wiring between ICM board

and stove limit.

Is there voltage to terminal 2 of ICM

board?

Replace ICM board.Is there voltage to terminal 1 of ICM

board?

Correct wiring to gas valve coils.

Is there voltage across the coils of the gas

valve?

Replace the coils or complete gas valve.

Is there gas flow through the valve?

Unit is operational.Is there a flame?

Continued from column 2 of previous page.

NO

YES

NO

NO

NO

NO

NO

YES

YES

YES

YES

YES

NO

YES

NO

NO

YES

YES

Check gas pressures and

adjust if necessary.Does the ignitor spark?

Replace igniter or ignition cable.

YES

NO

Is the unit equipped with gas heat or

electric heat?

GAS

Is there voltage across HC1 & HC2 coils?


Correct the wiring to the HC1 and/or

HC2 coils.

Correct wiring between supply,

contacts and elements. Replace contactors and/or

elements if necessary.

UNIT OPERATIONAL.

ELECTRIC

NO

YES

NO

YES

T012D



43. Will Not Heat – Gas – EDC Models

T032D

Note: Tests are conducted with unit running and calling for heat.


Correct wiring between FS-2 and

COM of lint drawer.



EDC control?



control.


switch?

Check for proper function of airflow switch and replace

if necessary.

Is there voltage across COM & N.C. terminal

of airflow switch?


7 on motor control relay and N.C. terminal on airflow switch.


control relay?





3 of fan motor centrifugal switch and terminal 4 of



switch?

Replace fan motor.Is there voltage across

terminals 3 & 5 of fan motor centrifugal

switch?



centrifugal switch.


cabinet limit?


Is there voltage across cabinet limit?



limit?

NO

YES

Is the thermistor

operational?

Replace EDC control.

Replace thermistor.

YES

NONO

YES

NO

YES

YES

NO

NO

YES

YES

NO

NO

YES

YES

NO

NO

YES

YES

NO

NO

YES


Single and stacked units.

T032D



43. Will Not Heat – Gas – EDC Models (continued)

T033D



limit?


2 of ICM board and stove limit.

Is there voltage to terminal 2 of the ICM

board?

Replace ICM board.Is there voltage at terminal 1 of ICM

board?

Correct wiring between gas valve

and ICM board.


valve?

Replace gas valve coils or complete

gas valve.

Is there gas flow through the gas valve?

Replace high voltage ignition cable or igniter.

Does the igniter spark?

Unit operational.Is there a flame?NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

YES

NO

T033D



44. Will Not Heat – Gas – Manual Timer

T044D

NOTE: The following tests are conducted with the Heat Timer in the "ON" position with the






YES

NO

there voltage atairlow switch

N.C. terminal totransformer



NO

YES


NO Correct wiring between airlow switch and terminal 6 on CR1.


Replace CR1.

YES

NO

YES



4 on CR1.

NO

YES


Replace CR2.NO

YES


board.


NO

YES Replace thermistor.


YES

CONTINUED ON NEXT

PAGE

Single and stacked units with and without time delay boards.


NO

YES

Is there voltage to


NO

YES

Correct wiring between fan motor terminal 3 and CR1

terminal 4.

there voltageacross terminal

3 & 5 of fanmotor?

Replace fan motor.YES

NO

Correct wiring between motor terminal 5 and

temp control board terminal 1.


Is the temperature selection switch shorted or open?

YES

NO

T044D

Is

neutral?

Is



44. Will Not Heat – Gas – Manual Timer (continued)

TMB1834S


cabinet limit?


YES

NO


cabinet limit?

YES



limit?

NO

YES



limit?

NO

YES



ICM board?

YES

NO Correct wiring between ICM board

and stove limit.


the ICM board?

YES

UNIT OPERATIONAL

NOReplace ICM board



valve?

NO

YES


and ICM board.



Is there a flame?

Replace gas valve or gas valve coils.

Replace high voltage cable or

igniter.

NO

YES

NO

YES

NO

YES

TMB1834S



45. Will Not Heat – Gas – Rotary Coin Drop

T090D





YES

NO





NO

YES


NOCorrect wiring

between airflow switch and COM on

switch B.


Replace switch B.

YES

NO

YES



NO

YES


Replace CR2.NO

YES


4 on CR2 & terminal 1 on temp control

board.


NO



YES

CONTINUED ON NEXT

PAGE

Single and stacked tumblers with

and without time delay.


board?

NO

YES

Is there voltage on terminal 3 of fan motor

to transformerneutral?


from terminal 5 to transformer

neutral?

Correct wiring between terminal 3 of fan motor

and N.C. terminal on switch B.

NO

YES

Replace fan motor.



NO

YES

NO

YES

Correct wiring between terminal 1 of temp board

to terminal 5 of fan motor.

Power supply to temp control board is good.



YES

NO

T090D



45. Will Not Heat – Gas – Rotary Coin Drop (continued)

T091D



NO


cabinet limit?

YES



limit?

NO

YES

Correct wiring between stove limit

and cabinet limit.


limit?

NO

YES


Is there voltage across terminals 2 & 3 of the ICM board?

YES

NOCorrect wiring between ICM

board and stove limit or neutral.

Is there voltage across terminals 1 & 3 of the ICM board?


YES

YES

Is there a flame?

UNIT OPERATIONAL

NO Replace the ICM board.


NO

YES



valve?

NO

YES


and ICM board.


NO

YES


gas valve.

NO

YES

T091D



46. Will Not Heat – Steam – EDC Models

T096D

NO

YES

YES

NONO

YES

NO

YES

YES

NO

NO

YES

YES

NO

NO

YES

YES

NO

NO

YES

YES

NO

NO

YES



Correct wiring between FS-2 and

COM of lint drawer.



EDC control?



control.


switch?

Check for proper function of airflow

switch and replace if necessary.


of airflow switch?





control relay?




of fan motor centrifugal switch and terminal 4 of



switch?


terminals 3 & 5 of fan motor centrifugal

switch?



centrifugal switch.


cabinet limit?





limit?

Is the thermistor

operational?

Replace EDC control.Replace

thermistor.


Single and stacked units.

T096D



46. Will Not Heat – Steam – EDC Models (continued)

T097D



limit?

Correct wiring to steam valve coil.

Is there voltage across steam valve coil?

Repair or replace steam valve.

Does steam valve operate properly?

Check for proper steam supply.

Correct if necessary.Is heat produced?

NO

YES

NO

YES

NO

YES

NO

YES

Unit operational.

T097D



47. Will Not Heat – Steam – Manual Timer

T019D

NOTE: The following tests are conducted with the Heat Timer in the "ON" position with the






YES

NO

Is there voltage atairflow switch N.C.



inoperative.

NO

YES


NOCorrect wiring

between airflow switch and

terminal 6 on CR1.


Replace CR1.

YES

NO

YES



4 on CR1.

NO

YES


Replace CR2.NO

YES


board.


NO



YES

CONTINUED ON NEXT

PAGE

Single and stacked units with and without time delay boards, manual timers.


NO

YES

Is there voltage to


NO

YES

Correct wiring between fan motor

terminal 3 and CR1 terminal 4.

Is there voltage across terminal

3 & 5 of fan motor?

Replace fan motor.YES

NO

Correct wiring between motor terminal 5 and temp control

board terminal 1.



YES

NO

T019D



47. Will Not Heat – Steam – Manual Timer (continued)

T020D



YES

NO


cabinet limit?

YES



limit?

NO

YES



limit?

NO

YES


Is there voltage across the coil of the steam

valve?

YES

NO Correct wiring to the steam valve.

Do the steam valves operate properly?

YES

UNIT OPERATIONAL

NO Replace steam valve.


Is heat produced?NO

YES


Correct if necessary.

T020D



48. Will Not Heat – Steam – OPL Microprocessor

T003D



and primary fuse.





Correct wiring between N.O. terminal of door

switch and secondary fuse.



Correct wiring between N.O. of lint panel switch and COM of door

switch.

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO



terminal 3.




Replace thermister.

YES

NO

NO

YES

Reference voltage to transformer neutral

terminal 3.

Testing conducted with unit running and calling for heat.




fuse(s)?

there voltage acrossterminals 1 & 2 on

primary oftransformer?





fuse?

Is there voltage to N.O terminal of door

switch?


of door switch?


switch?


Is the thermister operating properly?

Is there votlage at terminal 5 on OPL

Micro?

T003D

Is



48. Will Not Heat – Steam – OPL Microprocessor (continued)

T004D




Micro?




8 of OPL Micro and COM of lint

panel switch.

YES

YES

NO

NO

Replace OPL Micro.

Correct wiring between terminal 6 & 13 on OPL

Micro.

Is there voltage to terminal 13 of OPL

Micro?


Micro?

Replace OPL Micro.

NO

NO

YES

YES

Column 1

Correct wiring between COM &

OPL Micro.

Is there voltage at COM of airflow

switch?


replace if necessary.

Is there voltage at N.C. terminal ofairflow switch?


7 of motor control relay and N.C. of

airflow switch.


control relay ?



control relay?

Correct wiring between fan motor centrifugal switch and motor control

relay.


switch?


switch?

Column 2


NO

NO

NO

NO

NO

NO

YES

YES

YES

YES

YES

YES

The following tests are conducted with the unit running


Is the unit supplied with single phase or three

phase power?

Single phase

Is there voltage to terminal 14 on motor

control relay?

Is there votlage to terminal 13 of motor

control relay?



terminal of airflow switch.


Three phase

NO

YES

NO

YES

T004D



48. Will Not Heat – Steam – OPL Microprocessor (continued)

TMB1835S



centrifugal switch.

Is there voltage to the input of the cabinet

limit?


Is there voltage to output of cabinet limit?


Is there voltage to input of stove limit?

Replace stove limit.Is there voltage to the

output side of the stove limit?

Replace or rebuildsteam valve.

Does the steam valve operate properly?


Correct if necessary.Is heat produced?

Continued from column 2 of previous page.

NO

YES

NO

NO

NO

NO

NO

YES

YES

YES

YES

YES

Correct wiring to steam valve coil.

NOIs there voltage across steam valve coil?

YES

UNIT OPERATIONAL.

TMB1835S



49. Will Not Heat – Steam – Rotary Coin Drop

T066D

Is there voltage across terminals 1 & 6 of the temp control

Is there voltage across terminals 5 & 6 of the temp control

board?

board?

YES

NO




inoperative.

NO

YES


NO Correct wiring betweenairflow switch and COM on switch B.


Replace switch B.

YES

NO

YES



NO

YES


Replace CR2.NO

YES


4 on CR2 & terminal 1 ontemp control

board.


NO



YES

CONTINUED ON NEXT

PAGE

Single and stacked tumblers with

and without time delay.


board?

NO

YES

Is there voltage on terminal 3 of fan motor to

transformer neutral?


from terminal 5 to transformer

neutral?


3 of fan motor and N.C. terminal

on switch B.

NO

YES

Replace fan motor.



NO

YES

NO

YES

Correct wiring between terminal 1 of temp board to terminal 5 of

fan motor.

Power supply to temp control board is good.



YES

NO

T066D



49. Will Not Heat – Steam – Rotary Coin Drop (continued)

TMB1836S


cabinet limit?


NO


cabinet limit?

YES



limit?

NO

YES



limit?

NO

YES


Is there voltage across coil of steam valve?

YES

NO Correct wiring to steam valve

Does the steam valve operate properly?

YES

UNIT OPERATIONAL

NO Replace or rebuild steam valve.


Is heat produced?NO

YES


Correct if necessary.

YES

TMB1836S


Section 6Micro Display Control Troubleshooting




WARNING

Does the display on the

electronic control

increment properly?

Is connector H2 on the

control firmly seated in

its receptacle?

Are wires exiting coin

drop optical sensor

cracked or broken?

Exit diagnostic

testing and reset


Reconnect and run

diagnostic test

again.

Reconnect and run

diagnostic test

again.

Replace coin drop

or optic switch.

Replace coin drop.

If problem still exists

then replace the

electronic control.

Start coin drop

diagnostic tests.

YES

NO

YES

YES

NO

YES

NO

NO

Single and stacked

units. Gas and electric

heat. Single and three

phase power supply.

TMB1837S

Is the 3 pin connector

between coin drop and

control connected

correctly?

TMB1837S


Micro Display Control Troubleshooting

51. Control Has No Display

Is there 24 VAC across H1-1 & H1-3 on

the control?

Replace Electronic Control.


NO

Is there 120 VAC at input of primary fuses?

Is there 120 VAC at output side of the primary fuses?

Is there 120 VAC across terminals 1 & 2 of


Plug unit in and start cycle.

Correct wiring between primary fuse and power

supply.




Is there 24 VAC across terminals 1 &

4 of transformer secondary?


Is there 24 VAC at the input of the

secondary fuse?

Is there 24 VAC at output side of

secondary fuse?




Correct wiring between control and

secondary fuse.

YES

NONO

YES

NO

NO

NO

NO

NO

YES

YES

YES

YES

YES

YES

(8)

(1)

(2)

(3)

(4)

(5)

(6)

(7)

Gas, steam and electric heat.Single and three phase power supply.

TMB249S



Control Has No Display

TM

B17

67S

PR

IMA

RY

FU

SE

AG

C-2

A

250V

SE

CO

ND

AR

YF

US

EM

DL-3

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250V

N

DO

OR

SW

ITC

H

WH

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CH

AS

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OU

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TP

AN

EL

SW

ITC

H

CA

BIN

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LIM

ITT

HE

RM

OS

TA

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FL

OW

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ITC

H

BLK

L1

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LT. BLU

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RV

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HT

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OM

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MN

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BR

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ED

OR

G/B

RN

CO

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N.O

.

N.C

.

12

12

BLK

TH

ER

MIS

TO

R

RE

D/B

LU

WH

T

RED/WHT

RE

D/B

LK

WHT/VLT

RE

D/B

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RE

D

WH

T/B

LU

SE

CO

ND

AR

YF

US

E1.2

5 T

250V

RED RED

WH

T

34

GR

N/Y

EL

WH

T

89

10

H4

025 &

030 M

OD

ELS

L2

24

V

3.5

A

12

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24

V

1.5

A

24Vac Ret

H3

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H3

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= 3

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ma

TIM

E 2

0m

sec

MIN

.

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AR

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PU

T

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CH

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AIL

AB

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UT

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DE

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H2-2

H2

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FS

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H1-2

51

23

86

411

10

97

12

CO

IN D

RO

PS

H5

24Vac

H1-4

12

34

56

7H

624Vac Ret

Ima

x=5

ma

H3

-3 &

H3

-4

Vm

ax=

28

Vd

c

OP

TO

OF

F W

HE

N

HE

AT

RE

LA

Y

MO

TO

R R

EL

AY

H2-5

DO

OR

SE

NS

ING

CIR

CU

IT A

LL

OW

S

VO

LT

AG

E C

ON

FIG

UR

AT

ION

IN

PU

TJU

MP

ER

H2

-2 T

O H

2-5

AS

FO

LL

OW

S:

240V

ac

- 13.6

K o

hm

10 w

att

CO

NT

RO

L T

O T

UR

N O

N M

OT

OR

RE

LA

Y O

NL

Y W

HE

N D

OO

R I

SC

LO

SE

D &

SW

ITC

H I

S P

RE

SS

ED

24

Va

c -

WIR

E J

UM

PE

R1

20

Va

c -

6.8

K o

hm

5 w

att

MD

C C

ON

TR

OL

CO

NT

RO

LP

OW

ER

SU

PP

LY

24VAC

H1-1

H1-3

H11L1

46

53

21

H3

100 O

HM

1/4

wa

tt

4N25

H2-4

H2-3

FS

-11

H2

-6

Door

Sense

Ret

CIR

CU

IT C

ON

TR

OL

SH

EA

T R

EL

AY

TE

MP

. R

EG

UL

AT

ING

10

H4

89

74

56

23

1

2

3

4

5

6

7

TM

B17

67

S



52. Door Open Indicator

Is there voltage at H2-1 on the Electronic

control?Replace Control.


NO







supply.






secondary fuse?


secondary fuse?




NO

NO

NO

NO

NO

NOYES

YES

YES

YES

YES

YES

YES

Is there 24 VAC at N.O. of door

switch?

Is there 24 VAC at N.O. of lint drawer

switch?


necessary.


door switch.




necessary.

Correct wiring between H2-1 of electronic control and COM of lint drawer switch.

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO


neutral.(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(11)

TMB250S



Is there 24 VAC at COM of lint drawer


With door closed is there 24 VAC to

COM of door switch?


TMB205S



Door Open Indicator

TM

B17

68S

PR

IMA

RY

FU

SE

AG

C-2

A

25

0V

SE

CO

ND

AR

YF

US

EM

DL

-3.5

A2

50

V

N

DO

OR

SW

ITC

H

WH

T

CH

AS

SIS

GR

OU

ND

LIN

TP

AN

EL

SW

ITC

H

CA

BIN

ET

LIM

ITT

HE

RM

OS

TA

T

AIR

FL

OW

SW

ITC

H

BLK

L1

RED

LT. BLU

SE

RV

ICE

CO

NN

EC

TIO

N

TB

1

BLK RED

RE

D/W

HT

N.O

.C

OM

CO

MN

.O.

BR

N/R

ED

OR

G/B

RN

CO

M

N.O

.

N.C

.

12

12

BL

K

TH

ER

MIS

TO

R

RE

D/B

LU

WH

T

RED/WHT

RE

D/B

LK

WHT/VLT

RE

D/B

LKRED/BLK

RE

D

WH

T/B

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SE

CO

ND

AR

YF

US

E1

.25

T2

50

V

RED RED

WH

T

34

GR

N/Y

EL

WH

T

89

10

H4

02

5 &

03

0 M

OD

EL

S

L2

24V

3.5

A

120V

24V

1.5

A

24Vac Ret

H3-1

& H

3-2

Iin=

3-3

0m

aT

IME

20m

sec

MIN

.

ST

AR

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UL

SE

IN

PU

T

MA

CH

INE

RU

NN

ING

AV

AIL

AB

LE

OU

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H2-2

H2-1

FS

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H1-2

51

23

86

411

10

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12

CO

IN D

RO

PS

H5

24Vac

H1-4

12

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56

7H

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24Vac Ret

Imax=

5m

a

H3-3

& H

3-4

Vm

ax=

28V

dc

OP

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OF

F W

HE

N

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AT

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LA

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UR

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TJU

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S:

24

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ac

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H IS

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ac

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ER

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24VAC

H1-1

H1-3

H11L1

46

53

21

H3

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1/4

wa

tt

4N25

H2-4

H2-3

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Door

Sense

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AT

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10

H4

89

74

56

23

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2

34

5

6

7

89

1011

TM

B17

68

S



53. Motor Will Not Start/Run

Is there voltage across

H2-1 and H2-6 on

the electronic control ?

YES

Replace MDC

Control.

Is there voltage

across H2-4 and H2-6

on the electronic control?

Is there voltage at

terminal 5 of the


Is there voltage at

terminal 8 of motor

control relay?


terminals 1 & 4 of

the fan motor?

Does the fan motor

run?

Is there voltage at

terminal 6 of motor

control relay?

Is there voltage at

terminal 9 of motor

control relay?

Replace

control.

Correct wiring

between terminal 5

and power supply.

Replace motor

control relay.

Correct wiring

between fan motor

and motor control

relay.

Replace fan motor.

Correct wiring

between terminal 6

of motor control

relay and supply.

Replace motor

control relay.

NO

YES

YES

YES

YES

YES

NO

NO

NO

NO

YES

YES

NO

NO

Note: test conducted with vend

price satisfied and start button

pressed.

Correct wiring

between L1, L2 and

power supply.

Replace motor

control relay.

Is the unit equipped

with single phase or

three phase power?

Is there supply voltage

to L1 and L2 of the


Is there votlage across

L1 & T1 and L2 & T2?

Single phase

NO

YES

YES

NO

3 phase. Also

see Note on

next page

Is unit equipped with

single phase or three

phase power supply?


between L2 & L3 of


Three phase. Also

see Note on next

page.

NO

YES


terminals L2 & T2 and

L3 & T3?

Correct wiring

between L2, L3 and

supply.

Replace motor

control relay.

YES

NO

Single phase

Single and stacked

units. Gas, electric and

steam heat. Single and

three phase supply.

NO Refer to

Door open

flow chart.

(1)

Is there voltage

across the coil of

the motor control

relay?

Correct wiring to coil

of motor relay .

(2)

YES

NO

(3)

(4)

(5)

(6)

(7)

(8)

(10)

(11)

(12)

(13)



53. Motor Will Not Start/Run (continued)

Please see following 2 pages for wiring diagram information.


terminals 1 & 4 of

cylinder motor?

Does the cylinder

motor run?

Correct wiring

between cylinder

motor and motor

control relay.

Replace cylinder

motor.

NO

NO

YES

YES

Motors are

operational.

Note: For high voltage three phase supply (380 volts

or higher), the cylinder and fan motors are supplied

by L1, L2, L3 through the motor relay terminals T1,

T2, T3. Make the appropriate adjustments when

doing voltage checks.

(9)

Correct wiring

between fan motor

and motor control

relay.

Replace fan motor.

Correct wiring

between terminal 6

of motor control

relay and supply.

Replace motor

control relay.

NO

NO

NO

NO

Also

n next

NO Correct wiring

between L2, L3 and

supply.

Replace motor

control relay.

YES

Single phase

TMB251STMB251S



Motor Will Not Start/Run (Sheet 1 of 2)

TM

B18

65S

M

1

VA

LV

3G

ND3

GN

D

42 GN

D

TH

M

1

AU

X

TH

ER

M P

RO

T.

4

MA

IN 1

MA

IN 2

RU

N

FA

N M

OT

OR

CE

NT

RIF

UG

AL

SW

ITC

H

WH

T

CH

AS

SIS

GR

OU

ND

WH

T

AIR

FL

OW

SW

ITC

H

5

RU

N

MA

IN 2

MA

IN 1

4

FA

NM

OT

OR

TH

ER

M P

RO

T.

AU

X

1

IC

M

IGN

CY

LIN

DE

R M

OT

OR

BLU/BLK

BR

N/R

ED

WH

T

OR

G/B

RN

CO

M

N.O

.OR

GB

RN

OR

G/

WH

TW

HT

/B

RN

BR

N/W

HT

35

3

GRY/BLKBLK

M

5 8

6 9

LT. BLU

BLK/RED

BL

K/R

ED

12

0V

SE

RV

ICE

20

8-2

40

VS

ER

VIC

E

TB

1-L

1

TB

1-N

TB

1-L

2

N.C

.

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K

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ER

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WH

T/

BL

KWH

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GA

S V

ALV

E

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ST

CO

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SE

CO

ND

CO

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BA

M

74

GR

N/Y

EL

RE

D/B

LK

WHT/VLT

WHT

RE

D/B

LKRED/BLK

RE

D

WH

T/B

LU

WH

T

GR

N/Y

EL

WH

T

12

34

56

78

91

0

WH

TW

HTT

HE

RM

IST

OR

BL

KW

HT

H4

025 &

030 M

OD

ELS

035 M

OD

ELS

24Vac Ret

H3

-1 &

H3

-2Iin

= 3

-30

ma

TIM

E 2

0m

sec

MIN

.

ST

AR

T P

UL

SE

IN

PU

T

MA

CH

INE

RU

NN

ING

AV

AIL

AB

LE

OU

TP

UT

SE

E V

EN

DA

PP

LIC

AT

ION

DE

TA

IL

H2

-2 H2

-1

FS

-2

H1-2

51

23

86

41

11

09

71

2

CO

IN D

RO

PS

H5

24Vac

H1-4

12

34

56

7H

6

24Vac Ret

Ima

x=5

ma

H3

-3 &

H3

-4

Vm

ax=

28

Vd

c

OP

TO

OF

F W

HE

N

HE

AT

RE

LA

Y

MO

TO

R R

EL

AY

H2

-5

DO

OR

SE

NS

ING

CIR

CU

IT A

LL

OW

S

VO

LT

AG

E C

ON

FIG

UR

AT

ION

IN

PU

TJU

MP

ER

H2

-2 T

O H

2-5

AS

FO

LL

OW

S:

24

0V

ac

- 1

3.6

K o

hm

10

wa

tt

CO

NT

RO

L T

O T

UR

N O

N M

OT

OR

RE

LA

Y O

NL

Y W

HE

N D

OO

R I

SC

LO

SE

D &

SW

ITC

H I

S P

RE

SS

ED

24

Va

c -

WIR

E J

UM

PE

R1

20

Va

c -

6.8

K o

hm

5 w

att

MD

C C

ON

TR

OL

CO

NT

RO

LP

OW

ER

SU

PP

LY

24VAC

H1-1

H1-3

H11L1

46

53

21

H3

10

0 O

HM

1/4

wa

tt

4N25

H2

-4

H2

-3

FS

-1

1

H2

-6

Do

or

Se

nse

Re

t

CIR

CU

IT C

ON

TR

OL

SH

EA

T R

EL

AY

TE

MP

. R

EG

UL

AT

ING

10

H4

89

74

56

23

CA

BIN

ET

LIM

ITT

HE

RM

OS

TA

T

ST

OV

EL

IMIT

TH

ER

MO

ST

AT

1

VL

TV

LT

ST

OV

EL

IMIT

TH

ER

MO

ST

AT

2

VL

T/W

HT

1

4 5

23

7

8

69



Motor Will Not Start (Sheet 2 of 2)

TM

B17

70S

12

34

TB

1-L

1

TB

1-L

2

TB

1-L

3BLK/WHT

BLK/WHT

PR

IMA

RY

FU

SE

S

AG

C-2

A

250V

BLK BLK 12

SE

CO

ND

AR

YF

US

EM

DL

-3.5

A250V

M

FA

N M

OT

OR

CE

NT

RIF

UG

AL

SW

ITC

H

DO

OR

SW

ITC

H

WH

T

CH

AS

SIS

GR

OU

ND

WH

T

LIN

TP

AN

EL

SW

ITC

HA

IR F

LO

WS

WIT

CH

REDRED

RE

D/W

HT

N.O

.C

OM

CO

MN

.O.

BR

N/R

ED

WH

T

OR

G/B

RN

CO

M

N.O

.OR

GB

RN

OR

G/

WH

TW

HT

/B

RN

BR

N/W

HT

N.C

.

BL

K

TH

ER

MIS

TO

R

M

14

13

RE

D/B

LU

WH

T

RED/WHT

RE

D/B

LK

WHT/VLT

WHT

RE

D/B

LKRED/BLK

RE

D

WH

T/B

LU

SE

CO

ND

AR

YF

US

E1.2

5 T

250V

RED RED

WH

T

GR

N/Y

EL

WH

T

12

34

56

78

910

WH

TW

HTT

HE

RM

IST

OR

BL

KW

HT

H4

02

5 &

03

0 M

OD

EL

S0

35

MO

DE

LS

CA

BIN

ET

LIM

ITT

HE

RM

OS

TA

T

ST

OV

EL

IMIT

TH

ER

MO

ST

AT

VL

TV

LT

/WH

T

TB

1-L

3

TB

1-L

2

TB

1-L

1

SE

ET

RA

NS

FO

RM

ER

CO

NF

IGU

RA

TIO

NJU

MP

ER

HC

1H

C2

L3

T3

H3

H5

L2

T2

24V

4.0

A

24V

1.5

A

12

34

56

1

AU

X

TH

ER

M P

RO

T.

4

MA

IN 1

MA

IN 2

RU

N

5

RU

N

MA

IN 2

MA

IN 1

4

FA

NM

OT

OR

TH

ER

M P

RO

T.

AU

X

1

CY

LIN

DE

R M

OT

OR

BLU/BLK

3

GRY/BLK

M

BLK

BLK/WHT

BLK/RED

L1

L2

L3

T1

T2

T3

MM

LT. BLU

LT. BLU

HC

1

HC

2

35

5

TE

MP

. R

EG

ULA

TIN

G

HE

AT

RE

LA

YC

IRC

UIT

CO

NT

RO

LS

32

15

FS

-2

H2

-1

4N25

24Vac Ret

24Vac

MA

CH

INE

RU

NN

ING

H6 3

AP

PL

ICA

TIO

N D

ET

AIL

SE

E V

EN

D

H5

74

68

12

91

01

1

CO

IN D

RO

PS

H1-4

H1-2

21

65

46

7

Vm

ax=

28V

dc

Imax=

5m

a

H3 5

43

HE

AT

RE

LA

Y

MO

TO

R R

EL

AY

ST

AR

T P

ULS

E IN

PU

T

AV

AIL

AB

LE

OU

TP

UT

TIM

E 2

0m

sec

MIN

.Iin

= 3

-30m

aH

3-1

& H

3-2

OP

TO

OF

F W

HE

NH

3-3

& H

3-4

MD

C C

ON

TR

OL

120V

ac

- 6.8

K o

hm

5 w

att

24V

ac

- W

IRE

JU

MP

ER

240V

ac

- 13.6

K o

hm

10 w

att

JUM

PE

R H

2-2

TO

H2-5

AS

FO

LLO

WS

:V

OLT

AG

E C

ON

FIG

UR

AT

ION

IN

PU

T

H2

-2

H2

-5

SU

PP

LY

PO

WE

RC

ON

TR

OL

CLO

SE

D &

SW

ITC

H IS

PR

ES

SE

DR

ELA

Y O

NLY

WH

EN

DO

OR

IS

CO

NT

RO

L T

O T

UR

N O

N M

OT

OR

DO

OR

SE

NS

ING

CIR

CU

IT A

LLO

WS

24Vac Ret

24VAC

H1-1

H1-3

9H

410

67

8

1/4

wa

tt

121

00

OH

M

H11L1

FS

-1

H2

-4

H2

-3

Do

or

Se

nse

Re

t

H2

-6

32

41

1

3

2

12 13

10 11

69 TM

B17

70

S



54. Unit Will Not Heat – Gas

Note: Tests are conducted with unit runningand calling for heat.

All voltage checks are referenced totransformer neutral.

Correct wiringbetween FS-2 andCOM of lint drawer.

Is there voltage atFS-2 of EDC control?

Is there voltageat FS-1 of EDC

control?

Correct wiringbetween COM ofairflow switch and

FS-1 of EDCcontrol.

Is there voltage at COMof airflow switch?

Check for properfunction of airflow

switch and replace ifnecessary.

Is there voltage acrossCOM & N.C. terminal

of airflow switch?

Correct wiringbetween terminal 7

on motor controlrelay and N.C.

terminal on airflowswitch.

Is there voltage atterminal 7 of motor

control relay?

Replace motorcontrol relay.



Correct wiringbetween terminal 3

of fan motorcentrifugal switchand terminal 4 of


Is there voltage atterminal 3 of fanmotor centrifugal

switch?


terminals 3 & 5 of fan motor centrifugal switch?

Correct wiringbetween cabinet

limit and terminal 5of fan motor

centrifugal switch.

Is there voltage to theinput side of the

cabinet limit?

Replace cabinetlimit.

Is there voltage acrosscabinet limit?

Correct wiringbetween stove limit 1

and cabinet limit.

Is there voltage to theinput side of the stove

limit?

NO

YES

Is thethermistor

operational?

Replace EDCcontrol.

Replacethermistor.

YES

NONO

YES

NO

YES

YES

NO

NO

YES

YES

NO

NO

YES

YES

NO

NO

YES

YES

NO

NO

YES

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(11)

TMB1869S



54. Unit Will Not Heat – Gas (continued)

Please see following page for wiring diagram information.

Replace the stovelimit.

Is there voltage acrossthe stove limit 1?

NO

YES

(12)

TMB1869S

(13)

Correct wiringbetween stove limit 1

and stove limit 2.

Is there voltage toinput side ofstove limit 2?

Replace stove limit 2.

NO

YES

NO

YES

(14)

Is there voltageacross stove limit 2?

Correct wiringbetween terminal 2of ICM and stove

limit 2.

Is there voltage toterminal 2 of

the Ignition ControlModule (ICM)?

Replace ICM board.Is there voltage atterminal 1 of ICM

board?

Correct wiringbetween gas valve

and ICM board.

Is there voltage acrossthe coils of the gas

valve?

NO

YES

NO

YES

NO

YES

(16)

(15)

(17)

Note: Make sure unit isnot in a lock out

condition.

Replace gas valvecoils or complete

gas valve.

Is there gas flowthrough the gas valve?

Replace highvoltage ignitioncable or igniter.


YES NO

YES

NO

YES

Unit operational.Is there a flame?YES

NO

TMB1869S



Unit Will Not Heat – Gas

TM

B18

66S

M

FA

N M

OT

OR

CE

NT

RIF

UG

AL

SW

ITC

H

WH

T

CH

AS

SIS

GR

OU

ND

WH

T

AIR

FL

OW

SW

ITC

H

5

RU

N

MA

IN 2

MA

IN 1

4

FA

NM

OT

OR

TH

ER

M P

RO

T.

AU

X

1

BR

N/R

ED

WH

T

OR

G/B

RN

CO

M

N.O

.OR

GB

RN

OR

G/

WH

TW

HT

/B

RN

BR

N/W

HT

35

3

GRY/BLKBLK

M

5 8

LT. BLU

N.C

.

BL

K

TH

ER

MIS

TO

R

BA

M

74

RE

D/B

LK

RE

D/B

LKRED/BLK

RE

D

WH

T/B

LU

WH

T

GR

N/Y

EL

WH

T

12

34

56

78

91

0

WH

TW

HTT

HE

RM

IST

OR

BLK

WH

T

H4

02

5 &

03

0 M

OD

EL

S0

35

MO

DE

LS

24Vac Ret

H3

-1 &

H3

-2Iin

= 3

-30

ma

TIM

E 2

0m

sec

MIN

.

ST

AR

T P

UL

SE

IN

PU

T

MA

CH

INE

RU

NN

ING

AV

AIL

AB

LE

OU

TP

UT

SE

E V

EN

DA

PP

LIC

AT

ION

DE

TA

IL

H2-2

H2-1

FS

-2

H1-2

51

23

86

411

10

97

12

CO

IN D

RO

PS

H5

24Vac

H1-4

12

34

56

7H

6

24Vac Ret

Ima

x=5

ma

H3

-3 &

H3

-4

Vm

ax=

28

Vd

c

OP

TO

OF

F W

HE

N

HE

AT

RE

LA

Y

MO

TO

R R

ELA

Y

H2-5

DO

OR

SE

NS

ING

CIR

CU

IT A

LL

OW

S

VO

LT

AG

E C

ON

FIG

UR

AT

ION

IN

PU

TJU

MP

ER

H2-2

TO

H2-5

AS

FO

LLO

WS

:

24

0V

ac

- 1

3.6

K o

hm

10

wa

tt

CO

NT

RO

L T

O T

UR

N O

N M

OT

OR

RE

LA

Y O

NL

Y W

HE

N D

OO

R I

SC

LO

SE

D &

SW

ITC

H I

S P

RE

SS

ED

24

Va

c -

WIR

E J

UM

PE

R1

20

Va

c -

6.8

K o

hm

5 w

att

MD

C C

ON

TR

OL

CO

NT

RO

LP

OW

ER

SU

PP

LY

24VAC

H1-1

H1-3

H11L1

46

53

21

H3

100 O

HM

1/4

watt

4N25H

2-4

H2-3

FS

-11

H2-6

Door

Sense

Ret

CIR

CU

IT C

ON

TR

OL

SH

EA

T R

EL

AY

TE

MP

. R

EG

ULA

TIN

G

10

H4

89

74

56

23

1

VA

LV3

GN

D3

GN

D

42 GN

D

TH

CA

BIN

ET

LIM

ITT

HE

RM

OS

TA

T

ST

OV

EL

IMIT

TH

ER

MO

ST

AT

1

IC

M

IGN

VLT

VLT

ST

OV

EL

IMIT

TH

ER

MO

ST

AT

2VLT

/WH

T

WH

T/

BLKW

HT

GA

S V

AL

VE

FIR

ST

CO

IL

SE

CO

ND

CO

ILG

RN

/YE

L

WHT/VLT

WHT

1

23

46

8

1012

14

11

13

9

15

17

16

7

5



55. Unit Will Not Heat – Steam

Note: Tests are conducted with unit running


All voltage checks are referenced to

transformer neutral.

Correct wiring

between FS-2 and

COM of lint drawer.

Is there voltage on

FS-2 of EDC control?

Is there voltage

on FS-1 of

EDC control?

Correct wiring

between COM of

airflow switch and

FS-1 of EDC

control.

Is there voltage on

COM of airflow

switch?

Check for proper

function of airflow


necessary.


COM & N.C. terminal

of airflow switch?

Correct wiring

between terminal 7

on motor control

relay and N.C.

terminal on airflow

switch.

Is there voltage on

terminal 7 of motor

control relay?

Replace motor

control relay.


terminals 7 & 4 of


Correct wiring

between terminal 3

of fan motor

centrifugal switch

and terminal 4 of


Is there voltage on

terminal 3 of fan

motor centrifugal switch?

Replace fan motor.


terminals 3 & 5 of

fan motor centrifugal switch?

Correct wiring

between cabinet

limit and terminal 5

of fan motor

centrifugal switch.

Is there voltage to the

input side of the

cabinet limit?

Replace cabinet

limit.


cabinet limit?

Correct wiring

between stove limit

and cabinet limit.


input side of the stove

limit?

NO

YES

Is the

thermistor

operational?

Replace EDC

control.Replace

thermistor.

YES

NONO

YES

NO

YES

YES

NO

NO

YES

YES

NO

NO

YES

YES

NO

NO

YES

YES

NO

NO

YES

Single and stacked

units.

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(11)

TMB1841S



55. Unit Will Not Heat – Steam (continued)


Correct wiring

between terminal 3

of fan motor

centrifugal switch

and terminal 4 of


Replace fan motor.

Correct wiring

between cabinet


of fan motor

centrifugal switch.

Replace cabinet

limit.

Correct wiring

between stove limit

and cabinet limit.

Replace the stove

limit.


the stove limit?

Correct wiring

between steam

valve and stove

limit.


the coil of the steam valve?

NO

YES

NO

YES

(12)

(13)

Does the steam valve

open allowing steam to flow?

Unit operational.

Replace or rebuild

steam valve.

No

TMB1841S

No Heat

continued.

TMB1841S



Unit Will Not Heat – Steam

TM

B17

72S

M

FA

N M

OT

OR

CE

NT

RIF

UG

AL

SW

ITC

H

WH

T

CH

AS

SIS

GR

OU

ND

WH

T

AIR

FLO

WS

WIT

CH

BR

N/R

ED

WH

T

OR

G/B

RN

CO

M

N.O

.OR

GB

RN

OR

G/

WH

TW

HT

/B

RN

BR

N/W

HT

35

N.C

.

BLK

TH

ER

MIS

TO

R

BA

M

74

RE

D/B

LK

WHT/VLT

WHT

RE

D/B

LKRED/BLK

RE

D

WH

T/B

LU

WH

T

GR

N/Y

EL

WH

T

12

34

56

78

910

WH

TW

HTT

HE

RM

IST

OR

BLK

WH

T

H4

025 &

030 M

OD

ELS

035 M

OD

ELS

CA

BIN

ET

LIM

ITT

HE

RM

OS

TA

T

ST

OV

ELIM

ITT

HE

RM

OS

TA

T

VLT

VLT

/WH

TW

HT

/BLK

ST

EA

MV

ALV

E

5

TE

MP

. R

EG

ULA

TIN

G

HE

AT

RE

LA

YC

IRC

UIT

CO

NT

RO

LS

32

15

FS

-2

H2-1

4N25

24Vac Ret

24Vac

MA

CH

INE

RU

NN

ING

H6 3

AP

PLIC

AT

ION

DE

TA

ILS

EE

VE

ND

H5

74

68

12

910

11

CO

IN D

RO

PS

H1-4

H1-2

21

65

46

7

Vm

ax=

28V

dc

Imax=

5m

a

H3 5

43

HE

AT

RE

LA

Y

MO

TO

R R

EL

AY

ST

AR

T P

ULS

E IN

PU

T

AV

AIL

AB

LE

OU

TP

UT

TIM

E 2

0m

sec

MIN

.Iin

= 3

-30m

aH

3-1

& H

3-2

OP

TO

OF

F W

HE

NH

3-3

& H

3-4

MD

C C

ON

TR

OL

120V

ac

- 6.8

K o

hm

5 w

att

24V

ac

- W

IRE

JU

MP

ER

240V

ac

- 13.6

K o

hm

10 w

att

JUM

PE

R H

2-2

TO

H2-5

AS

FO

LLO

WS

:V

OLT

AG

E C

ON

FIG

UR

AT

ION

IN

PU

T

H2-2

H2-5

SU

PP

LY

PO

WE

RC

ON

TR

OL

CLO

SE

D &

SW

ITC

H IS

PR

ES

SE

DR

ELA

Y O

NLY

WH

EN

DO

OR

IS

CO

NT

RO

L T

O T

UR

N O

N M

OT

OR

DO

OR

SE

NS

ING

CIR

CU

IT A

LLO

WS

24Vac Ret

24VAC

H1-1

H1-3

9H

410

67

8

1/4

watt

121

00 O

HM

H11L1

FS

-1

H2-4

H2-3

Door

Sense

Ret

H2-6

32

41

1

7

84

6

1012

13

52

3

119

TM

B17

72

S



56. Unit Will Not Heat – Electric





Correct wiring

between FS-2 and

COM of lint panel

switch.

Is there voltage at


Is there voltage

on FS-1 of

EDC control?

Correct wiring

between COM of

airflow switch and

FS-1 of EDC

control.

Is there voltage at COM

of airflow switch?

Check for proper

function of airflow


necessary.


COM & N.C. terminal

of air flow switch?

Correct wiring

between terminal 7

on motor control

relay and N.C.

terminal on airflow

switch.

Is there voltage at

terminal 14 of motor

control relay?

Replace motor

control relay.


terminals 13 & 14 of


Correct wiring

between terminal 3

of fan motor

centrifugal switch

and terminal 13 of


Is there voltage at

terminal 3 of fan

motor centrifugal

switch?

Replace fan motor.


terminals 3 & 5 of


Correct wiring

between cabinet


of fan motor

centrifugal switch.


input side of the

cabinet limit?

Replace cabinet

limit.


cabinet limit?

Correct wiring

between stove limit

and cabinet limit.



limit?

NO

YES

Is the

thermistor

operational?

Replace EDC

control.Replace

thermistor.

YES

NONO

YES

NO

YES

YES

NO

NO

YES

YES

NO

NO

YES

YES

NO

NO

YES

YES

NO

NO

YES

Single and stacked

units.

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(11)

TMB1842S



56. Unit Will Not Heat – Electric (continued)


Replace the stove

limit.


the stove limit?

Correct wiring

between heater

contactor and stove

limit.


the coil(s) of the heater

contactor(s)?

No Heat

continued.

NO

YES

NO

YES

(12)

(13)


L1, L2 and L3

terminals of HC1?

Correct wiring

between HC1 and

Line voltage.

Do all elements

produce heat?

Check elements for

shorts or opens.

Check wires

between contactors

and elements.


T1 & T2, T2 & T3 and

T3 & T1?

Check for

proper operation of

contactors, replace

them if necessary.


L1, L2 and L3

terminals of HC2?

YES

NO

Correct wiring

between HC2 and

Line voltage.

(14)

(15)

YES

NO

(16)(17)(18)

NO

YES

NO

YES

Unit is operational

Note: Please make

the oppropriate

adjustments if your

unit is single phase.

TMB1842STMB1842S



Unit Will Not Heat – Electric

TM

B17

73S

L3

L2L1

SE

RV

ICE

CO

NN

EC

TIO

N

TB

3

12

34

BLK/WHT

BLK/WHT

PR

IMA

RY

FU

SE

S

AG

C-2

A

25

0V

BLK BLK 12

HE

AT

ING

EL

EM

EN

TS

SE

CO

ND

AR

YF

US

EM

DL

-3.5

A2

50

V

M

FA

N M

OT

OR

CE

NT

RIF

UG

AL

SW

ITC

H

DO

OR

SW

ITC

H

WH

T

CH

AS

SIS

GR

OU

ND

WH

T

LIN

TP

AN

EL

SW

ITC

HA

IR F

LO

WS

WIT

CH

REDRED

RE

D/W

HT

N.O

.C

OM

CO

MN

.O.

BR

N/R

ED

WH

T

OR

G/B

RN

CO

M

N.O

.OR

GB

RN

OR

G/

WH

TW

HT

/B

RN

BR

N/W

HT

N.C

.

BL

K

TH

ER

MIS

TO

R

M

14

13

RE

D/B

LU

WH

T

RED/WHT

RE

D/B

LK

WHT/VLT

WHT

RE

D/B

LKRED/BLK

RE

D

WH

T/B

LU

SE

CO

ND

AR

YF

US

E1

.25

T2

50

V

RED RED

WH

T

GR

N/Y

EL

WH

T

12

34

56

78

91

0

WH

TW

HTT

HE

RM

IST

OR

BL

KW

HT

H4

02

5 &

03

0 M

OD

EL

S0

35

MO

DE

LS

CA

BIN

ET

LIM

ITT

HE

RM

OS

TA

T

ST

OV

EL

IMIT

TH

ER

MO

ST

AT

VLT

VLT

/WH

T

TB

1-L

3

TB

1-L

2

TB

1-L

1

SE

ET

RA

NS

FO

RM

ER

CO

NF

IGU

RA

TIO

NJU

MP

ER

HC

2

L3 T3

T1

L1

HC

2H

C1

HC

2H

C1

HC

1

L3

T3

H3

H5

L2

T2

L2

T2

H2

H4

L1 T1

H1

H6

24

V

4.0

A

24

V

1.5

A

12

34

56

HC

1

HC

2

35

5

TE

MP

. R

EG

ULA

TIN

G

HE

AT

RE

LA

YC

IRC

UIT

CO

NT

RO

LS

32

15

FS

-2

H2-1

4N25

24Vac Ret

24Vac

MA

CH

INE

RU

NN

ING

H6 3

AP

PL

ICA

TIO

N D

ET

AIL

SE

E V

EN

D

H5

74

68

12

910

11

CO

IN D

RO

PS

H1-4

H1-2

21

65

46

7

Vm

ax=

28

Vd

c Im

ax=

5m

a

H3 5

43

HE

AT

RE

LA

Y

MO

TO

R R

EL

AY

ST

AR

T P

ULS

E IN

PU

T

AV

AIL

AB

LE

OU

TP

UT

TIM

E 2

0m

sec

MIN

.Iin

= 3

-30

ma

H3

-1 &

H3

-2

OP

TO

OF

F W

HE

NH

3-3

& H

3-4

MD

C C

ON

TR

OL

12

0V

ac

- 6

.8K

oh

m 5

wa

tt2

4V

ac

- W

IRE

JU

MP

ER

240V

ac

- 13.6

K o

hm

10 w

att

JUM

PE

R H

2-2

TO

H2-5

AS

FO

LLO

WS

:V

OL

TA

GE

CO

NF

IGU

RA

TIO

N I

NP

UT

H2-2

H2-5

SU

PP

LY

PO

WE

RC

ON

TR

OL

CL

OS

ED

& S

WIT

CH

IS

PR

ES

SE

DR

EL

AY

ON

LY

WH

EN

DO

OR

IS

CO

NT

RO

L T

O T

UR

N O

N M

OT

OR

DO

OR

SE

NS

ING

CIR

CU

IT A

LL

OW

S

24Vac Ret

24VAC

H1-1

H1-3

9H

41

06

78

1/4

wa

tt

121

00

OH

M

H11L1

FS

-1

H2-4

H2-3

Door

Sense

Ret

H2-6

32

41

1

14

7

84

6

1012

13

52

3

11

17

16

1815

9

TM

B17

73

S



57. Error CodesOP - Indicates physical “open” in the thermistor circuit. Possible causes are: 1) thermistor, 2) wiring between con-trol and thermistor, 3) control.SH - Indicates a “short” in the thermistor circuit. Possible causes are: 1) shorted thermistor, 2) a short in the wiring between control and thermistor, 3) control.

Card Reader Machines: (In addition to the above errors)EC:19 - Indicates no card reader communication. The control and the reader cannot communicate. Check reader, control and harness.

NOTE: For all other card reader errors, consult the card reader manual provided by the manufacturer.

Display Definition Corrective Action

OP Indicates an open circuit in the thermistor. • Check thermistor. Replace if inoperative.• Check wiring between control and

thermistor. Refer to wiring diagram for proper wiring.

• Check control. Replace if inoperative.

SH Indicates a short circuit in the thermistor. • Check thermistor. Replace if inoperative.• Check wiring between control and

thermistor. Refer to wiring diagram for proper wiring.

• Check control. Replace if inoperative.

EC:19

*Card Readermodels only

Indicates no communication between control and card reader.

• Check card reader. Replace if inoperative.• Check wire harness connecting card reader

and control. Replace if inoperative.• Check control. Replace if inoperative.



Gas ModelsSchematic

TM

B18

67S

PR

IMA

RY

FU

SE

AG

C-2

A

250V

SE

CO

ND

AR

YF

US

EM

DL-3

.5A

250V

M

1

VA

LV3

GN

D3

GN

D

42 GN

D

TH

M

N

1

AU

X

TH

ER

M P

RO

T.

4

MA

IN 1

MA

IN 2

RU

N

FA

N M

OT

OR

CE

NT

RIF

UG

AL

SW

ITC

H

DO

OR

SW

ITC

H

WH

T

CH

AS

SIS

GR

OU

ND

WH

T

LIN

TP

AN

EL

SW

ITC

H

CA

BIN

ET

LIM

ITT

HE

RM

OS

TA

T

ST

OV

ELIM

ITT

HE

RM

OS

TA

T 1

AIR

FLO

WS

WIT

CH

5

RU

N

MA

IN 2

MA

IN 1

4

FA

NM

OT

OR

TH

ER

M P

RO

T.

AU

X

1

IC

M

BLK

L1

IGN

RED

LT. BLU

CY

LIN

DE

R M

OT

OR

BLU/BLK

SE

RV

ICE

CO

NN

EC

TIO

N

TB

1

BLK RED

RE

D/W

HT

N.O

.C

OM

CO

MN

.O.

BR

N/R

ED

WH

T

OR

G/B

RN

CO

M

N.O

.OR

GB

RN

OR

G/

WH

TW

HT

/B

RN

BR

N/W

HT

VL

TV

LT

ST

OV

ELIM

ITT

HE

RM

OS

TA

T 2VL

T/W

HT

35

3

GRY/BLKBLK

M

5 8

6 9

LT. BLU

BLK/RED

BL

K/R

ED

120V

SE

RV

ICE

208-2

40V

SE

RV

ICE

TB

1-L

1

TB

1-N

TB

1-L

2

N.C

.

12

12

BLK

TH

ER

MIS

TO

R

WH

T/

BL

KWH

T

GA

S V

ALV

E

FIR

ST

CO

IL

SE

CO

ND

CO

IL

BA

M

74

GR

N/Y

EL

RE

D/B

LU

WH

T

RED/WHT

RE

D/B

LK

WHT/VLT

WHT

RE

D/B

LKRED/BLK

RE

D

WH

T/B

LU

SE

CO

ND

AR

YF

US

E1.2

5 T

250V

RED RED

WH

T

34

GR

N/Y

EL

WH

T

12

34

56

78

910

WH

TW

HTT

HE

RM

IST

OR

BLK

WH

T

H4

025 &

030 M

OD

ELS

035 M

OD

ELS

L2

24V

3.5

A

120V

24V

1.5

A

CO

IN D

RO

P V

EN

D O

PT

ION

SIN

GLE

, D

UA

L A

ND

CO

IN D

RO

P R

EA

DY

CA

RD

RE

AD

ER

RE

AD

Y V

EN

D O

PT

ION

VE

ND

AP

PL

ICA

TIO

ND

ET

AIL

S

JUM

PE

RJU

MP

ER

JUM

PE

RJU

MP

ER

SW

ITC

HS

WIT

CH

SW

ITC

HS

WIT

CH

SE

RV

ICE

DO

OR

SE

RV

ICE

DO

OR

SE

RV

ICE

DO

OR

SE

RV

ICE

DO

OR

BRN BRN BRN BRN2222

GRY GRY GRY GRY

H5

33H

5H

533

H5

PNK PNK PNK PNK

511

5511

58

644

688

644

68

10

977

910

10

977

910

12

11

11

12

12

11

11

12

SW

ITC

HC

OIN

VA

ULT

SW

ITC

HS

ER

VIC

E D

OO

R

BRN

GRY

CO

IN D

RO

P 1

(OP

TIO

NA

L)

(OP

TIO

NA

L)

CO

IN D

RO

P 2

PNK

H5

31

58

64

2

RED

BLK

WHT

BLU

12

11

10

97

BLK

WHT

PLE

AS

E C

ON

SU

LT

CA

RD

RE

AD

ER

IN

ST

ALLA

TIO

NM

AN

UA

L F

OR

PR

OP

ER

CO

NN

EC

TIO

NS

TO

CO

NT

RO

L

43

21

H6

54

76

65

13

2H

3

41

23

54

H6

56

76

H3

32

1

24Vac Ret

H3-1

& H

3-2

Iin=

3-3

0m

aT

IME

20m

sec

MIN

.

ST

AR

T P

UL

SE

IN

PU

T

MA

CH

INE

RU

NN

ING

AV

AIL

AB

LE

OU

TP

UT

SE

E V

EN

DA

PP

LIC

AT

ION

DE

TA

IL

H2

-2

H2

-1

FS

-2

H1-2

51

23

86

41

11

09

71

2

CO

IN D

RO

PS

H5

24Vac

H1-4

12

34

56

7H

6

24Vac Ret

Imax=

5m

a

H3-3

& H

3-4

Vm

ax=

28V

dc

OP

TO

OF

F W

HE

N

HE

AT

RE

LA

Y

MO

TO

R R

ELA

Y

H2

-5

DO

OR

SE

NS

ING

CIR

CU

IT A

LLO

WS

VO

LT

AG

E C

ON

FIG

UR

AT

ION

IN

PU

TJU

MP

ER

H2

-2 T

O H

2-5

AS

FO

LL

OW

S:

24

0V

ac

- 1

3.6

K o

hm

10

wa

tt

CO

NT

RO

L T

O T

UR

N O

N M

OT

OR

RE

LA

Y O

NLY

WH

EN

DO

OR

IS

CLO

SE

D &

SW

ITC

H IS

PR

ES

SE

D

24V

ac

- W

IRE

JU

MP

ER

120V

ac

- 6.8

K o

hm

5 w

att

MD

C C

ON

TR

OL

CO

NT

RO

LP

OW

ER

SU

PP

LY

24VAC

H1-1

H1-3

H11L1

46

53

21

H3

100 O

HM

1/4

watt

4N25

H2

-4

H2

-3

FS

-11

H2

-6

Do

or

Se

nse

Re

t

CIR

CU

IT C

ON

TR

OLS

HE

AT

RE

LA

Y

TE

MP

. R

EG

UL

AT

ING

10

H4

89

74

56

23

1.

DO

OR

SW

ITC

H:

N.O

. C

ON

TA

CT

CL

OS

ED

WH

EN

DO

OR

CL

OS

ED

.

2. M

OT

OR

S A

RE

PR

OT

EC

TE

D B

Y IN

TE

RN

AL O

VE

RLO

AD

S.

3. T

HE

RM

OS

TA

T: O

PE

NS

WH

EN

TE

MP

ER

AT

UR

E IS

RE

AC

HE

D.

4.

CO

NN

EC

T E

LE

CT

RIC

AL S

ER

VIC

E O

F P

RO

PE

R V

OLT

AG

E

A

ND

CU

RR

EN

T R

AT

ING

TO

TB

1.

NO

TE

S:



Gas ModelsConnection Diagram

TM

B18

68S

MO

TO

RF

AN

LO

W

2W

HT

/

WH

TB

RN

/

BR

N5

4

BLK

GR

Y/

BLU

LT

.

31

4

BR

N

BLU

SE

RV

ICE

DO

OR

CA

RD

RE

AD

ER

RE

AD

Y V

EN

D O

PT

ION

6

SIN

GL

E,

DU

AL

AN

D C

OIN

DR

OP

RE

AD

Y

SW

ITC

H

PN

K

6 72 3

H3

541

CO

IN V

EN

D O

PT

ION

GR

Y

GR

Y

BR

N

1 2 4 5 63 7

H3

GR

Y

BR

N

GR

Y

SE

RV

ICE

DO

OR

CO

IN D

RO

P 2

(O

PT

ION

AL)

CO

IN D

RO

P 1

(O

PT

ION

AL)

VE

ND

AP

PLIC

AT

ION

DE

TA

ILS

4

H6

651 322 139 87

BLK

WH

T

BLU

RE

D

BLK

WH

T

2 3 1

2 3 1

6B

LK

4 5 10

WH

T

RE

D

H5

11

12

BLK

WH

T

RE

D

22

3 1

3 1

9 8 2 13 42 3 517

H6

BR

N

PN

K

GR

Y

BLK

BLU

WH

T

2 13

12 411 6 105

2B

LK

WH

T

RE

D

3 1

H5

SW

ITC

HPR

OP

ER

CO

NN

EC

TIO

N T

OC

ON

TR

OL

MA

NU

AL F

OR

INS

TA

LLA

TIO

NC

AR

D R

EA

DE

RP

LE

AS

E C

ON

SU

LT

TH

ER

MIS

TO

R

BLU

/BLK

BLU/

MO

TO

RC

YLIN

DE

R

LO

W

LT

.4

BLK

BLU

/

BLU

4

12

BLU

BR

N

OR

G/B

RN

SW

ITC

HA

IR F

LO

W

CO

M.

WH

T/V

LT

WHT/ORG

OR

G

N.O

.

N.C

.

GR

OU

ND

SE

RV

ICE

IGN

ITIO

N

IGN

ITO

R

GA

SV

ALV

E

MO

DU

LE

CO

NT

RO

L41 325

GR

N/Y

EL

TH

ER

MO

ST

AT

1S

TO

VE

LIM

ITT

HE

RM

OS

TA

T 2

ST

OV

E L

IMIT

WH

T

VLT

VLT

/WH

T

WH

T/ T

HE

RM

OS

TA

TC

AB

INE

T L

IMIT

BLK

VLT

WH

T1

122

GR

N/Y

EL

GR

N/Y

EL

WH

T/B

LK

288

25

96

116

95

WH

T

VLT

/WH

T

WH

T/B

LK

WH

TBRN

BLK

FO

R 2

08V

AN

D 2

40V

SE

RV

ICE

.120V

SE

RV

ICE

AN

D T

O L

2 F

OR

CO

NN

EC

T B

LK

/RE

D T

O L

1 F

OR

LT

. B

LU

GR

Y/B

LK

BR

N/W

HT

WH

T/B

RN

11

22

TB

1LT. BLU

L2

CO

NN

EC

TIO

NS

ER

VIC

E

L1 N

ORG/WHT

GRY/BLK

A7

B

89

RE

LA

YM

OT

OR

45

6

BLK

/RE

D BLK

/RE

D

BLK

BLK/RED

45

BLK

LT

. B

LU

LT

. B

LU

BLK

/RE

D

BLK

BLK

6321

WHT

SE

CO

ND

AR

Y F

US

E

WH

T/B

LU

WHT

11

11

BLK

WH

T

GR

N/Y

EL

WH

T/V

LT

PN

K/B

LK

WH

T/B

LU

PN

K

RE

D/W

HT

WH

T

OR

G/W

HT

BR

N/R

ED

WH

T/B

RN

WH

T

34

774

3

12

12

13

14

14

13

64

11

11

46

BR

N/W

HT

32

112

37

89

559

87

10

10

WH

T/B

RN

BR

N/W

HT

OR

G/W

HT

BR

N

BR

N/R

ED

RE

D

RE

D/B

LU

WH

T/B

LU

SECONDARY FUSEREDRED

RE

D/B

LU

WHT/BRN

RE

D/B

LU

BR

N

RE

D

10

10

59

8 89

52

17 7

12

64

3 34

6

RE

D/W

HT

BR

N/R

ED

WH

T/V

LT

OR

G

RE

D/W

HT

SW

ITC

HP

AN

ELN

.O.

RE

D/

BLK

LIN

T

CO

M.

SW

ITC

H

CO

M.

RE

D/

WH

T

DO

OR

N.O

.

14

14

14

13

12 12

13

14

3 37

10

4 410

7

BLK

WHT

WHT/VLT

GR

Y

15

13

5 513

15

69

8 89

622

12

11

1 111

12

PN

K

BLK

WH

T

ORG/BRN

RED/BLK

WHT

RED/BLK

RED/BLK

GRN/YEL

RED

RE

D/B

LU

WH

T/B

LU

21

PNK

GRY

3 1 2 5 4 664

64

52

5211

MO

DE

LS

CO

IN

CO

IN V

AU

LT

GR

Y

SW

ITC

H

N.O

.

PN

K

CO

M.

33

BLK

MO

DE

LS

RE

AD

ER

CA

RD

JUM

PE

R

BLK

BY

PA

SS

H4

6

PRIMARY FUSE

TR

AN

SF

OR

ME

R

WHT

RE

D1

1

RE

D2

2

RE

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774

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Electric ModelsConnection Diagram

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10 28712 11 46

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N

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Y

H3

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3 4216

CO

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RO

P 1

(O

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ION

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CO

IN D

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P 2

(O

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ION

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33

WH

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H5

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H6

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7 328

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D5 10

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DE

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9S


Section 7NetMaster Troubleshooting

58. No IR Communication



WARNING

IR Communication


- IR communication disabled by

manual programming.

- Is the IR window on the control

covered or blocked.

- if needed, change control

board.


- low battery on microwand

- is the IR window covered or

blocked on the control.

- if needed replace the electronic

control

- is the IR cap properly attached to

the microwand.

Communication

sequence checks

out.

Attempt to

communicate with

the electronic

control from the

microwand.

Aim microwand

closer and try again.

Is there a response of

any kind from the

electronic control?

Does the control

respond?

Does the electronic

control display E:OF

or -C-?

NO

YES

-C-

"E:OF"

NO

YES

Single and stacked.

Gas and electric heat.

Single and three phase

power supply.

No IR Communication

TMB247STMB247S


NetMaster Troubleshooting


Does the display on the

electronic control

increment properly?

Is connector H5 on the

control firmly seated in

its receptacle?

Is the 3 pin connector

between coin drop and

control connected

correctly?

Are wires exiting coin

drop optical sensor

cracked or broken?

Exit diagnostic

testing and reset


Reconnect and run

diagnostic test

again.

Reconnect and run

diagnostic test

again.

Replace coin drop

or optic switch.

Replace coin drop.

If problem still exists

then replace the

electronic control.

Start coin drop

diagnostic tests.

YES

NO

YES

YES

NO

YES

NO

NO

Single and stacked

units. Gas and electric

heat. Single and three

phase power supply.

TMB1843S



60. Control Has No Display


Is there 24 VAC across H1-1 & H1-3 on

the control?

Replace Electronic Control.


NO






Correct wiring between primary fuse and power

supply.




Is there 24 VAC across terminals 1 &

4 of transformer secondary?



secondary fuse?


secondary fuse?




Correct wiring between control and

secondary fuse.

YES

NONO

YES

NO

NO

NO

NO

NO

YES

YES

YES

YES

YES

YES

(8)

(1)

(2)

(3)

(4)

(5)

(6)

(7)

TMB249S


TMB249S



Control Has No Display (Sheet 1 of 2)

1

6

7

4

5

3

2



Control Has No Display (Sheet 2 of 2)

TMB269STMB269S



61. Door Open Indicator


Is there voltage at H2-1 on the Electronic

control?Replace Control.


NO







supply.






secondary fuse?


secondary fuse?




NO

NO

NO

NO

NO

NOYES

YES

YES

YES

YES

YES

YES

Is there 24 VAC at N.O. of door

switch?

Is there 24 VAC at N.O. of lint drawer

switch?


necessary.


door switch.




necessary.

Correct wiring between H2-1 of electronic control and COM of lint drawer switch.

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO


neutral.(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(11)



Is there 24 VAC at COM of lint drawer


With door closed is there 24 VAC to

COM of door switch?


TMB250S



Door Open Indicator (Sheet 1 of 2)

1

4

6

7

8 9 10 11

5

3

2



Door Open Indicator (Sheet 2 of 2)

TMB270STMB270S



62. Motor Will Not Start/Run


H2-1 and H2-6 on

the electronic control ?

Motor Start/Run

YES

Replace electronic

Control.

Is there voltage

across H2-4 and H2-6

on the electronic control?

Is there voltage at

terminal 5 of the


Is there voltage at

terminal 8 of motor

control relay?


terminals 1 & 4 of

the fan motor?

Does the fan motor

run?

Is there voltage at

terminal 6 of motor

control relay?

Is there voltage at

terminal 9 of motor

control relay?

Replace

control.

Correct wiring

between terminal 5

and power supply.

Replace motor

control relay.

Correct wiring

between fan motor

and motor control

relay.

Replace fan motor.

Correct wiring

between terminal 6

of motor control

relay and supply.

Replace motor

control relay.

NO

YES

YES

YES

YES

YES

NO

NO

NO

NO

YES

YES

NO

NO

Note: test conducted with vend


pressed.

Note: tests conducted with vend


pressed.

Correct wiring

between L1, L2 and

power supply.

Replace motor

control relay.

Is the unit equipped

with single phase or

three phase power?


to L1 and L2 of the


Is there votlage across

L1 & T1 and L2 & T2?

Single phase

NO

YES

YES

NO

3 phase. Also

see note on

next page

Is unit equipped with

single phase or three

phase power supply?


between L2 & L3 of


Three phase. Also

see note on next

page.

NO

YES


terminals L2 & T2 and

L3 & T3?

Correct wiring

between L2, L3 and

supply.

Replace motor

control relay.

YES

NO

Single phase

Single and stacked

units. Gas, electric and

steam heat. Single and

three phase supply.

Motor (cylinder/fan)will not start/run

NORefer to "Door

open" flow chart.

(1)

Is there voltage

across the coil of

the motor control

relay?

Correct wiring to coil

of motor relay .

(2)

YES

NO

(3)

(4)

(5)

(6)

(7)

(8)

(10)

(11)

(12)

(13)



62. Motor Will Not Start/Run (continued)



terminals 1 & 4 of

cylinder motor?

Does the cylinder

motor run?

Correct wiring

between cylinder

motor and motor

control relay.

Replace cylinder

motor.

NO

NO

YES

YES

Motors are

operational.

Note: For high voltage three phase supply (380 volts

or higher), the cylinder and fan motors are supplied

by L1, L2, L3 through the motor relay terminals T1,

T2, T3. Make the appropriate adjustments when

doing voltage checks.

(9)

TMB251STMB251S




1

3

2

4

5




4

58

7

6 9

TMB271STMB271S




1




3

2

12

13

10

11

6 9

TMB272STMB272S



63. Unit Will Not Heat – Gas



Correct wiring between FS-2 and COM of lint drawer.

Is there voltage at FS-2 of NetMaster control?

Is there voltage at FS-1 of NetMaster

control?

Correct wiring between COM of airflow switch and FS-1 of NetMaster

control.

Is there voltage at COM of airflow switch?

Check for proper function of airflow

switch and replace if necessary.


of airflow switch?





control relay?




of fan motor centrifugal switch and terminal 4 of motor control relay.


switch?


terminals 3 & 5 of fan motor centrifugal switch?



centrifugal switch.


cabinet limit?





limit?

NO

YES

Is the thermistor

operational?

Replace NetMaster control.

Replace thermistor.

YES

NONO

YES

NO

YES

YES

NO

NO

YES

YES

NO

NO

YES

YES

NO

NO

YES

YES

NO

NO

YES

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(11)



63. Unit Will Not Heat – Gas (continued)



Is there voltage across the stove limit?


of ICM and stove limit.

Is there voltage to terminal 2 of

the Ignition Control Module (ICM)?

Replace ICM board.Is there voltage at terminal 1 of ICM

board?


and ICM board.


valve?


gas valve.




Unit operational.Is there a flame?

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

YES

NO

(12)

(13)

(14)

(15)

Note: Make sure unit is not in a lock out

condition.

TMB1857STMB1857S



Unit Will Not Heat – Gas (Sheet 1 of 2)

1

7

84 6

10 1213

52

3

9

11



Unit Will Not Heat – Gas (Sheet 2 of 2)

7

84 6

10 1213

14

5

15

9

11

TMB273STMB273S



64. Unit Will Not Heat – Steam





Correct wiring

between FS-2 and

COM of lint drawer.

Is there voltage on

FS-2 of electronic control?

Is there voltage

on FS-1 of

electronic

control?

Correct wiring

between COM of

airflow switch and

FS-1 of electronic

control.

Is there voltage on

COM of airflow

switch?

Check for proper

function of airflow


necessary.


COM & N.C. terminal

of airflow switch?

Correct wiring

between terminal 7

on motor control

relay and N.C.

terminal on airflow

switch.

Is there voltage on

terminal 7 of motor

control relay?

Replace motor

control relay.


terminals 7 & 4 of


Correct wiring

between terminal 3

of fan motor

centrifugal switch

and terminal 4 of


Is there voltage on

terminal 3 of fan

motor centrifugal switch?

Replace fan motor.


terminals 3 & 5 of


Correct wiring

between cabinet

limit and terminal "5"

of fan motor

centrifugal switch.


input side of the

cabinet limit?

Replace cabinet

limit.


cabinet limit?

Correct wiring

between stove limit

and cabinet limit.



limit?

NO

YES

Is the

thermistor

operational?

Replace electronic

control.Replace

thermistor.

YES

NONO

YES

NO

YES

YES

NO

NO

YES

YES

NO

NO

YES

YES

NO

NO

YES

YES

NO

NO

YES

Single and stacked

units.

Unit Will Not Heat (Steam)

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(11)



64. Unit Will Not Heat – Steam (continued)


Replace the stove

limit.


the stove limit?

Correct wiring

between steam

valve and stove

limit.


the coil of the steam valve?

NO

YES

NO

YES

(12)

(13)

Does the steam valve

open allowing steam to flow?

Unit operational.

Replace steam

valve.

No

TMB253S

No Heat

continued.

TMB253S



Unit Will Not Heat – Steam (Sheet 1 of 2)

1

7

4 6

10 12

52

3

119



Unit Will Not Heat – Steam (Sheet 2 of 2)

7

86

13

TMB274S

TMB274S



65. Unit Will Not Heat – Electric





Correct wiring

between FS-2 and

COM of lint panel

switch.

Is there voltage at


Is there voltage

on FS-1 of

EDC control?

Correct wiring

between COM of

airflow switch and

FS-1 of EDC

control.

Is there voltage at COM

of airflow switch?

Check for proper

function of airflow


necessary.


COM & N.C. terminal

of airflow switch?

Correct wiring

between terminal 7

on motor control

relay and N.C.

terminal on airflow

switch.

Is there voltage at

terminal 14 of motor

control relay?

Replace motor

control relay.


terminals 13 & 14 of


Correct wiring

between terminal 3

of fan motor

centrifugal switch

and terminal 13 of


Is there voltage at

terminal 3 of fan

motor centrifugal

switch?

Replace fan motor.


terminals 3 & 5 of


Correct wiring

between cabinet


of fan motor

centrifugal switch.


input side of the

cabinet limit?

Replace cabinet

limit.


cabinet limit?

Correct wiring

between stove limit

and cabinet limit.



limit?

NO

YES

Is the

thermistor

operational?

Replace EDC

control.Replace

thermistor.

YES

NONO

YES

NO

YES

YES

NO

NO

YES

YES

NO

NO

YES

YES

NO

NO

YES

YES

NO

NO

YES

Single and stacked

units.

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(11)



65. Unit Will Not Heat – Electric (continued)


Replace the stove

limit.


the stove limit?

Correct wiring

between heater

cotactor and stove

limit.


the coil(s) of the heater

contactor(s)?

No Heat

continued.

NO

YES

NO

YES

(12)

(13)


L1, L2 and L3

terminals of HC1?

Correct wiring

between HC1 and

Line voltage.

Check elements for

shorts or opens.

Check wires

between contactors

and elements.


T1 & T2, T2 & T3 and

T3 & T1?

Check for

proper operation of

contactors, replace

them if necessary.


L1, L2 and L3

terminals of HC2?

YES

NO

Correct wiring

between HC2 and

Line voltage.

(14)

(15)

YES

NO

(16)(17)(18)

NO

YES

NO

YES

Unit is operational

Note: Please make

the oppropriate

adjustments if your

unit is single phase.

TMB1845S

Do all elements

produce heat?

TMB1845S



Unit Will Not Heat – Electric (Sheet 1 of 2)

1

14

4

10

2

3

17

16

1815

9



Unit Will Not Heat – Electric (Sheet 2 of 2)

7

84 6

10 1213

5

3

119

TMB275STMB275S

Documents

Drying Tumbler Troubleshooting Manual