Alliance Laundry Systems BU120L, BU120N, CA120L, CA120N, CT120L Troubleshooting Manual

Drying Tumblers

TMB1268C

120 Pound Capacity 170 Pound Capacity

Models Starting Serial No. 0907003062

Refer to Page 7 for Model Numbers

Troubleshooting

www.comlaundry.com

Part No. 70422201

December 2009

Table of

Content s

Section 1 – Safety Information ...............................................................3

Locating an Authorized Service Person................................................5

Safety Warnings and Decals..................................................................5

Safety Precautions for Servicing Tumblers...........................................5

Section 2 – Introduction..........................................................................6

Model Identification..............................................................................6

Customer Service...................................................................................8

Serial Plate Location..............................................................................8

How a Tumbler Works..........................................................................9

Section 3 – Troubleshooting..................................................................10

1. Motor Does Not Start..................................................................11

2. Motor Overload Protector Cycles Repeatedly............................12

3. Motor Runs But Cylinder Does Not Turn...................................13

4. Motor Does Not Stop..................................................................14

5. Gas Burner Does Not Ignite........................................................15

6. Burner Ignites and Goes Out Repeatedly....................................16

7. Burner Shuts off Prematurely .....................................................17

8. Burner Repeatedly Cycles Off On High Limit Thermostat........18

9. Steam Valve or Burner Does Not Shut-off.................................19

10. Clothes Do Not Dry ....................................................................20

11. Tumbler Overheating..................................................................21

12. Burners Not Burning Properly - Gas Models..............................22

13. Loading Door Opens During Operation......................................23

14. Tumbler Runs But No Steam To Coils - Steam Models.............24

15. Water In Steam Line - Steam Models.........................................25

16. Tumbler Will Not Start, Time On Drying Timer,

Door Closed ................................................................................26

17. Motor Runs But Will Not Heat...................................................29

18. Cylinder Turns, But Will Not Heat.............................................30

Section 4 – Adjustments........................................................................32

19. Main Gas Burner Air Inlet Shutters (All Gas Models)...............32

20. Airflow Switch............................................................................33

21. Loading Door Strike....................................................................33

22. Cylinder Belt Tension.................................................................33

23. Cylinder Clearance......................................................................34

24. Drive Belt Tension......................................................................37

25. Fan Belt Tension.........................................................................37

Section 5 – Hybrid Timer Control Troubleshooting..........................39

26. Control Has No Display..............................................................40

27. Display Flashes “dr” With Door Closed.....................................42

28. Motor Will Not Start/Run...........................................................44

29. Unit Will Not Heat – Gas............................................................46

30. Error Codes.................................................................................49

the expressed written consent of the publisher.

70422201 1

Section 6 – On Premise Micro Control (RM) Troubleshooting ........50

31. Control Has No Display..............................................................51

32. Door Open Indicator ...................................................................53

33. Motor Will Not Start/Run...........................................................56

34. Unit Will Not Heat – Gas/Steam ................................................58

35. Error Codes.................................................................................61

2 70422201

Section 1

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

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.

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

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.

70422201 3

Safety Information

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

IMPORTANT INFORMATION: During the lifetime of a tumbler, 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 tumbler, 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 tumbler. These factors MUST BE supplied by the person(s) installing, maintaining or operating the tumbler.

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

4 70422201

Safety Information

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.

Safety Warnings and Decals

SAFETY WARNINGS and decals have been provided in key locations to remind you of important precautions for the safe operation and maintenance of your tumbler. 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. Refer to the Parts Manual for ordering replacement decals.

Safety Precautions for Servicing Tumblers

• Disconnect electrical service.

• Shut off supply gas valve before servicing gas

components.

• Access panel MUST be reinstalled after inspection or servicing of tumbler is completed.

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

• Belt guard MUST be reinstalled after inspection or servicing of tumbler is completed.

• Contactor box cover MUST be reinstalled after inspection or servicing of electric and/or reversing tumbler is completed.

• Loading door switch MUST be operational before putting tumbler into service.

• Junction box cover MUST be reinstalled after inspection or servicing of tumbler is completed.

70422201 5

Section 2

Introduction

Model Identification

Information in this manual is applicable to these models:

Gas Steam/Thermal Oil

HU120L HU120N IT120L IT120N KA120L KA120N KT120L KT120N KU120L KU120N LA120L LA120N LT120L LT120N LU120L LU120N PA120L PA120N PT120L PT120N PU120L PU120N

120

Pound

BA120L BA120N BT120L BT120N BU120L BU120N CA120L CA120N CT120L CT120N CU120L CU120N GA120L GA120N GT120L GT120N GU120L GU120N HA120L HA120N

HT120L HT120N

SA120L SA120N ST120L ST120N SU120L SU120N UA120L UA120N UT120L UT120N UU120L UU120N XT120L XT120N XU120L XU120N YT120L YT120N

BT120S BT120T BU120S BU120T CT120S CT120T CU120S CU120T GT120S GT120T GU120S GU120T HT120S HT120T HU120S HU120T IT120S IT120T KT120S KT120T KU120S KU120T LT120S

LT120T LU120S LU120T PT120S PT120T PU120S PU120T

ST120S

ST120T SU120S SU120T UT120S UT120T UU120S UU120T XT120S XT120T XU120S XU120T YT120S YT120T YU120S YU120T

6 70422201

170

Pound

BA170L BA170N BT170L BT170N BU170L BU170N CA170L CA170N CT170L CT170N CU170L CU170N GA170L GA170N GT170L GT170N GU170L GU170N HA170L HA170N HT170L HT170N

Gas Steam/Thermal Oil

HU170L HU170N IT170L IT170N KA170L KA170N KT170L KT170N KU170L KU170N LA170L LA170N LT170L LT170N LU170L LU170N PA170L PA170N PT170L

PT170N PU170L PU170N

SA170L SA170N ST170L ST170N SU170L SU170N UA170L UA170N UT170L UT170N UU170L UU170N XT170L XT170N XU170L XU170N YT170L YT170N

BT170S BT170T BU170S BU170T CT170S CT170T CU170S CU170T GT170S GT170T GU170S GU170T HT170S HT170T HU170S HU170T IT170S IT170T KT170S KT170T KU170S KU170T

Introduction

LT170S LT170T LU170S LU170T PT170S PT170T PU170S PU170T ST170S ST170T SU170S SU170T UT170S UT170T UU170S UU170T XT170S XT170T XU170S XU170T YT170S YT170T

Includes models with the following control suffixes:

R3 – reversing DX4 OPL RQ – reversing dual digital timer RD – reversing DMP OPL RM – reversing OPL micro

70422201 7

Introduction

TMB2288N

120 Pound

Junction

Box

Cover

Serial

Plate

Serial

Plate

Junction

Box

Cover

170 Pound

Customer Service

If literature or replacement parts are required, contact the source from whom 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.

Serial Plate Location

When calling or writing about your product, be sure to mention model and serial numbers. Model and serial numbers are located on serial plate as shown.

8 70422201

How a Tumbler Works

1

3

Introduction

A tumbler uses heated air to dry loads of laundry. ① When the motor is started, the exhaust fan pulls

room temperature air in through the air intake at the rear of the tumbler and over the heat source (burner flame for gas, heating element for

2

electric, and coil for steam).

② The heated air moves into the cylinder , where it is

circulated through the wet load by the tumbling action of the cylinder.

③ The air then passes throug h the lint filter, exhaust

fan, and is vented to the outdoors.

TMB2347S

70422201 9

Section 3

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam 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.

W002

WARNING

Troubleshooting

IMPORTANT: Refer to appropriate wiring diagram for aid in testing tumbler components.

10 70422201

1. Motor Does Not Start

TMB2360S

Motor does

not start

Is electrical power

off, has circuit

breaker tripped or

has control fuse

blown?

Check service

to tumbler. Check primary and secondary

fuses.

Is transformer

inoperative?

Replace

transformer.

Is loading door open or is door

switch

inoperative?

Close door or

test switch and

replace if

inoperative.

Is lint panel

switch not

closing?

Test lint panel

switch, replace

if inoperative.

Are trunnion

bearings binding?

Replace trunnion

bearings.

Is there

broken, loose

or incorrect

wiring?

Refer to wiring

diagram

located on

back of tumbler

or in literature

packet.

Ye s

No

Ye s

No

Ye s

No

Ye s

No

Ye s

Are idler bearings binding?

Replace

bearings.

Is motor

inoperative?

Have motor

tested and

replace if

inoperative.

Ye s

No

Ye s

No

TMB2360S

Troubleshooting

70422201 11

Troubleshooting

2. Motor Overload Protector Cycles Repeatedly

Motor overload

protector

cycles

repeatedly

Is voltage incorrect?

No

Yes

Refer to the

Installation

Manual for

electrical

requirements.

Is clothes

load too

large?

No

Is clothes

cylinder

binding?

No

Is wiring

inadequate?

No

Has lint

built up?

Yes

Remove part of

load.

Check cylinder

for binding.

Refer to

Adjustments

Section for

cylinder

adjustment.

Check with an

electrician to

ensure that

wiring is

adequate.

Clean lint

accumulation

on and around

motor.

Is there broken,

loose or

incorrect wiring?

12 70422201

No

Yes

Refer to wiring

diagram

located inside

contactor box.

TMB2361S

3. Motor Runs But Cylinder Does Not Turn

Motor runs but

cylinder does

not turn

Troubleshooting

Is motor

drive pulley

loose?

No

Are cylinder

belts broken

or loose?

No

Is drive belt

broken or

loose?

Ye s

Tighten drive

pulley bushing

screws.

Replace or

adjust belts.

Replace or adjust belt.

Is cylinder

binding?

70422201 13

No

Ye s

Check cylinder for

binding. Refer to

Adjustments Section

for proper cylinder

adjustment.

TMB1919S

Troubleshooting

Motor does not

stop

Is door switch

or lint panel

switch

inoperative?

Test switches and replace if

inoperative.

Is motor

contactor

inoperative?

Test motor

contactor and

replace if

inoperative.

TMB2362S

Yes

No

Yes

Is wiring

incorrect?

Refer to wiring

diagram located on

back of tumbler or

in literature packet.

Yes

No

4. Motor Does Not Stop

14 70422201

5. Gas Burner Does Not Ignite

TMB2363S

Troubleshooting

Gas burner

does not ignite

Is exhaust

system

inadequate?

No

Is

thermostat

inoperative?

No

Is gas

supply

insufficient?

No

Refer to the

Yes

Installation Manual for

exhaust system

requirements.

Yes

Test thermostat

and replace if

inoperative.

Open partially closed gas

shut-off valve or correct low

gas pressure. Check

Yes

manifold pressure and

adjust to pressure specified

on serial plate. If pressure

cannot be obtained, have

gas supplier check main

pressure.

Is there lint

buildup?

No

Is make-up

air or

ductwork

inadequate?

No

Is airflow

switch

inoperative?

No

Clean lint

compartment after

every eight-hour

Yes

shift. Check back

draft damper for lint

accumulation.

Check ductwork for

lint build-up.

Refer to

Installation

Manual to ensure

Yes

that ductwork and

make-up air

openings are sized

properly.

Test switch and

Yes

replace if

inoperative.

Are orifices

incorrect?

No

Are gas valve

coils

inoperative?

No

Tumbler is equipped for type of gas specified on

Yes

serial plate. If orifices

are different from that

specified on serial

plate, obtain and install

proper orifices.

Test coils and

Yes

replace if

inoperative.

Is there

broken, loose

or incorrect

wiring?

No

Is there

improper fan

rotation?

Yes

Refer to wiring

diagram located on

back of tumbler or

in literature packet.

May be due to

improper wiring

resulting in low

airflow. Refer to

Installation

Manual.

TMB2363S

70422201 15

Troubleshooting

Burner ignites

and goes out

repeatedly

Is gas pressure

insufficient?

Check gas supply

and pressure. Low

flame will not

maintain sensor

conductivity.

Are burner ports

plugged?

Check burner tubes

for build-up.

Is exhaust system or

make-up air

inadequate?

Refer to

Installation

Manual for

exhaust and

make-up air

requirements.

Is high limit or cabinet

limit thermostat

inoperative?

Test thermostat

and replace if

inoperative.

TMB1922S

Are orifices

improper?

Tumbler is equipped for type of

gas specified on serial plate. If

orifices are different from that

specified on serial plate, obtain

and install proper orifices.

Is flame recognition

circuit improper?

Replace high voltage lead.

Replace igniter.

Replace ignition control

module.

Yes

No

Yes

No

Yes

No

Yes

No

Yes

No

Yes

6. Burner Ignites and Goes Out Repeatedly

16 70422201

7. Burner Shuts off Prematurely

Burner shuts

off prematurely

Is there improper or

inadequate exhaust and/or

make-up air?

Refer to Installation

Manual for exhaust

and make-up air

requirements.

Is tumbler not properly

equipped for type of gas

used or altitude?

Tumbler is equipped for type of

gas specified on serial plate. If

not properly equipped for gas

type and altitude, obtain and

install correct components.

Is burner flame

improperly adjusted?

Refer to Adjustments Section

for burner flame adjustment.

Is high limit thermostat

cycling off?

Refer to Paragraph 8.

Ye s

No

Ye s

No

Ye s

No

Ye s

No

TMB2364S

Is fan rotation improper?

May be due to improper

wiring resulting in low

airflow. Refer to

Installation Manual..

Are gas valve coils inoperative?

Test coils and replace if

inoperative.

Ye s

No

Ye s

Troubleshooting

70422201 17

Troubleshooting

Burner repeatedly cycles off on high

limit thermostat

Is external exhaust system longer than

recommended or is

there inadequate

make-up air?

Refer to

Installation

Manual for

exhaust and

make-up air

requirements.

Is lint

screen

clogged?

Remove screen

and clean. Lint

screen and

compartment

should be cleaned

after every eight

hour shift.

Is there lint

in internal

tumbler

ductwork?

Disassemble

tumbler

ductwork and

clean.

Is there lint

in external

exhaust

system?

Disassemble

exhaust system

and clean.

Is high limit

thermostat

cycling at too low

a temperature?

Replace

thermostat.

Is lint door

panel not

closed

properly?

Remove lint door

panel - place lint door panel back on tumbler (ensuring a

tight fit).

Is there

improper fan

rotation?

May be due to

improper wiring

resulting in low

airflow. Refer

to Installation

Manual..

TMB1924S

Ye s

No

Ye s

No

Ye s

No

Ye s

No

Ye s

No

Ye s

No

Ye s

8. Burner Repeatedly Cycles Off On High Limit Thermostat

18 70422201

9. Steam Valve or Burner Does Not Shut-off

Steam valve or

burner does not

shut-off

Troubleshooting

Are there

impurities on gas

valve seat,

preventing valve

from closing?

No

Is wiring

incorrect?

Yes

Replace gas

valve or

disassemble

and clean

steam valve.

Refer to wiring

diagram located on

back of tumbler or

in literature packet.

TMB2365S

70422201 19

Troubleshooting

Clothes do

not dry

Is heat source

inoperative?

Refer to

Paragraph 17.

Is there too

much water in

articles being

dried?

Remove

excess water.

Is clothes

load too

large?

Remove part of

load. 120 or

170 pounds dry

weight (AHAM cotton load) is

maximum load.

Is exhaust

system

improper or

inadequate?

Refer to

Installation

Manual for

exhaust

requirements.

Does heat

source shut-

off

prematurely?

Refer to

Paragraph 18.

Is voltage

incorrect?

Refer to

Installation

Manual for

electrical

requirements.

TMB2366S

Is make-up

air

inadequate?

Refer to

Installation

Manual for

make-up air

requirements.

Ye s

No

Ye s

No

Ye s

No

Ye s

No

Ye s

No

Ye s

No

Ye s

Is there

improper fan

rotation?

May be due to

improper wiring

resulting in low

airflow. Refer

to Installation

Manual.

No

Ye s

10.Clothes Do Not Dry

20 70422201

11.Tumbler Overheating

Tumbler

overheating

Troubleshooting

Gas Models:

Are main

burner orifices

incorrect?

No

Gas Models:

Is gas

pressure too

high?

No

Steam Models:

Is steam

solenoid valve

stuck open?

No

Is make-up air

inadequate?

Yes

Adjust gas pressure as specified on serial plate.

Clean solenoid

Yes

valve and

necessary.

Installation

Yes

Manual for

make-up air

requirements.

Replace

orifices.

replace if

Refer to

Is there lint

accumulation?

No

Is exhaust

system

restricted or

inadequate?

No

Is

thermistor

inoperative?

Yes

Remove lint.

Remove

obstruction or lint

build-up from

Yes

exhaust ductwork.

Refer to

Installation

Manual for exhaust

system

requirements.

Test thermistor by

removing harness from

thermistor terminals. Check

Yes

resistance across

terminals, should read

approximately 50,000

Ohms at 77°F. Resistance

should decrease with a

temperature increase.

Replace thermistor if

inoperative.

No

70422201 21

TMB1927S

Troubleshooting

Burners not

burning

properly - Gas

Models

Are burner air

shutters incorrectly

adjusted?

Refer to

Adjustments

Section for

proper flame

adjustment.

Is there foreign

material in burners?

Disassemble

burners and

remove

obstruction.

Is gas pressure too

high or too low?

Check serial plate on back of the tumbler

for correct gas

pressure.

Are orifices incorrect?

Tumbler is equipped for type of gas specified on

serial plate. If orifices

are different from that

specified on serial

plate, obtain and install

proper orifices.

Is exhaust duct

restricted or blocked?

Disassemble and

clean exhaust

system.

TMB1928S

Ye s

No

Ye s

No

Ye s

No

Ye s

No

Is airflow switch not

functioning properly?

Check adjustment

and replace airflow

switch if necessary.

Is fan rotation improper?

May be due to improper

wiring resulting in low

airflow. Refer to

Installation Manual.

No

Ye s

No

Ye s

12.Burners Not Burning Properly - Gas Models

22 70422201

13.Loading Door Opens During Operation

Loading door opens during

operation

Is door strike

improperly

adjusted?

No

Adjustments

Troubleshooting

Refer to

Section for door strike

adjustment.

Yes

Is tumbler

improperly

leveled?

Yes

Refer to

Installation

Manual for

leveling leg

adjustment.

TMB1885S

70422201 23

Troubleshooting

14.Tumbler Runs But No Steam To Coils - Steam Models

Tumbler runs but

no steam to

coils - Steam

Models

Check all

valves in

supply and

return lines,

make sure they

are open.

Are shut-off

valves closed?

No

Ye s

Is steam trap

blocked?

No

Is solenoid valve

inoperative?

No

Is check valve

incorrectly installed?

No

Is strainer clogged?

Ye s

Remove trap

and clean.

Replace if

inoperative.

Check

operation of

solenoid valve.

Check for inlet and outlet markings on

check valve and

invert if necessary.

Remove strainer

and clean.

No

Is steam valve

clogged?

24 70422201

Ye s

Remove steam

valve and clean or

replace. Clean strainer before

returning unit to

service.

TMB1929S

15.Water In Steam Line - Steam Models

Water in steam

line - Steam

Models

Troubleshooting

Is steam

piping

installed

incorrectly?

No

Is trap

functioning

improperly?

Ye s

Refer to

Installation

Manual for

steam

requirements.

Check trap for size and

capacity. If trap is dirty or

sluggish, clean thoroughly

or replace. Check return

line for high back pressure.

Check trap for proper

installation. Refer to

Installation Manual for

requirements.

TMB1930S

70422201 25

Troubleshooting

16.Tumbler Will Not Start, Time On Drying Timer, Door Closed

Tumbler will

not start, time

on drying timer,

door closed

Is there line voltage into

transformer?

Yes

Is there control (24

VAC) voltage out

of transformer?

Yes

Is there a

blown control

circuit fuse?

No

(1)

Is there 24

volts into door

switch?

No

electrical

service to

(fuses/circuit

breaker).

No

transformer.

Yes

Replace fuse.

Check for broken

No

wire between fuse

and door switch.

Check

tumbler

Replace

(3)

Is there 24

volts into lint

panel switch?

Yes

(4)

Is there 24 volts

out of lint panel

switch?

Yes

Is there 24

volts across

fan contactor

coil?

No

Is lint panel

switch

functioning

properly?

No

Check for

broken wire between fuse and lint panel

switch.

Replace or

adjust lint

panel switch.

No

Check for

broken wire or

poor

connection at

harness plug.

Yes

(2)

Is there 24

No

volts out of

door switch?

Is door switch

functioning

properly?

Yes

26 70422201

Replace door

switch.

No

Ye s

Replace fan

contactor.

TMB2367S

Troubleshooting

1

2

34

Tumbler Will Not Start, Time On Drying Timer, Door Closed RQ Control

70422201 27

TMB2357S

Troubleshooting

1 2 3 4

Tumbler Will Not Start, Time On Drying Timer, Door Closed RM Control

TMB2319S

28 70422201

17.Motor Runs But Will Not Heat

Motor runs but

will not heat

Is igniter

sparking?

Is IEI

control in

safety

lockout?

Non-CE and non-Australian

models: Open and close door.

CE and Australian models:

Press and hold reset button

until light goes out

on the button.

Is resistance of

high voltage lead

greater than

28,000 ohms or

less than 10,500

ohms?

Replace high

voltage lead.

Is igniter

gap not

5/32 inch

(.397 cm)

or is

ceramic

cracked?

Regap or

replace igniter.

Replace

IEI

control.

Is

GRN/YEL wire

from IEI control

connected to

ground

terminal?

Connect

GRN/YEL

wire to ground

terminal.

Is gas shut-

off valve

turned on?

Turn on gas

shut-off valve.

TMB2368S

Is there an

open circuit

on gas

valve coils?

Replace gas valve or coil.

No No

No

Yes

No

Yes

No

Yes

No

Troubleshooting

70422201 29

Troubleshooting

TMB2369S-a

Cylinder turns,

but will not heat

Does airflow

switch stay

open?

Is fan turning

counterclockwise

as viewed from

the front?

Reverse any

two of the

electrical

service leads at

the fan motor

contactor.

Refer to

Installation

Manual for

makeup air and

exhaust duct

requirements.

Is gas

shut-off

valve

open?

Open gas shut-

off valve.

Ye s

No

Ye s

No

Ye s

Is there 24 volts

present at output

terminal of stove

high limit

thermostat?

Check for

broken or loose

wire to relay.

Is there 24 volts

present at input

terminal of stove

high limit

thermostat?

Replace stove

high limit

thermostat.

Is there 24 volts

present at output

terminal of airflow

switch?

Check for

broken or loose

wire to stove

high limit

thermostat.

Ye s

No

Ye s

No

Ye s

No

Continued on

next page.

18.Cylinder Turns, But Will Not Heat

30 70422201

18.Cylinder Turns, But Will Not Heat (continued)

TMB2369S-b

Continued from

previous page.

Is there 24 volts

present at input

terminal of airflow

switch?

Replace airflow

switch.

Is

there 24 volts

present at output

terminal of exhaust

high limit

thermostat?

Check for

broken or loose

wire to airflow

switch.

Is there 24 volts

present at input

terminal of cabinet limit thermostat?

Replace

cabinet limit

thermostat.

Is there 24

volts present

on org/wht

wire of fan

motor?

Check for

broken or loose

wire to cabinet

limit

thermostat.

No

Ye s

No

Ye s

No

Ye s

No

Ye s

Troubleshooting

70422201 31

Section 4

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam 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.

W002

WARNING

The air inlet shutters on the burner must be adjusted so sufficient primary air is metered into the system for proper combustion and maximum efficiency. Before adjusting the inlet shutter be sure that all lint is removed from lint compartment and lint screen.

W281

CAUTION

T197SE3D

Air Shutter

Adjusting Screw

INSUFFICIENT AIRFLOW

PROPER AIRFLOW

T196SE3D

Air Shutter

Adjusting Screw

T195SE3D

Air Shutter

Adjusting Screw

NO AIRFLOW

Adjustments

19.Main Gas Burner Air Inlet Shutters (All Gas Models)

Refer to Figure 1.

Air inlet shutter adjustments will vary from location to location and will depend on the vent system, number of units installed, make-up air and line gas pressure. Opening the shutter

increases the amount of primary air supplied to the burner while closing the shutter decreases the air supply. Adjust the air shutter as follows:

a. Remove access panel. b. Start tumbler and check the flame pattern.

Correct air and gas mixture is indicated if the flame pattern is primarily blue, with small yellow tips, and bends to the left of the heater section. Too little air is indicated if the flame is yellow, lazy and smokey.

c. To adjust the air inlet shutter, loosen locking

screw.

d. Slide shutter in or out as necessary to obtain

desired flame intensity.

e. After shutter is adjusted, tighten locking

screw securely.

f. If the flame pattern is straight up, insufficient

air is flowing through the tumbler. A flame pattern that flares to the right and left

32 70422201

Figure 1

Adjustments

Door

Latch

Door

Strike

T048I

20.Airflow Switch

The airflow switch is set at the factory for proper operation. No adjustment necessary.

IMPORTANT: Airflow switch vane must remain closed during operation. If it opens and closes during the drying cycle, this indicates insufficient airflow through the tumbler. If switch remains open, or pops open and closed during the cycle, the heating system will shut off. The cylinder and fan will continue to operate even though the airflow switch is indicating insufficient airflow.

21.Loading Door Strike

Refer to Figure 2. The door strike must be adjusted so it has

sufficient tension to hold loading door closed against the force of a tumbling load. The door strike is properly adjusted when 8-15 lbs. (17.6-33 kg) of pull is required to open door.

To adjust, open door, loosen nut and turn door strike screw in for less tension or out for more tension. Tighten nut. Refer to Figure 2.

170 Pound Models:

NOTE: Belt tension from cylinder drive motor pulley to step pulley can be measured to ensure proper installation in one of the following ways:

• Burroughs Belt Tension Gauge initial reading 6070 pounds.

• Force to deflect belt .38 inch at midspan with initial tensioning 6.0 pounds

• Burroughs Belt Tension Gauge reading after run 45-55 pounds.

Figure 2

22.Cylinder Belt Tension

120 Pound Models:

NOTE: Belt tension from step pulley to cylinder shaft pulley can be measured to ensure proper installation in one of the following ways:

• Burroughs Belt Tension Gauge initial reading

70-80 pounds.

• Force to deflect belt .38 inch at midspan with initial tensioning 6.5 pounds.

• Burroughs Belt Tension Gauge reading after run 55-65 pounds.

70422201 33

Adjustments

TMB1986P

Motor

Bracket

Pivot Screw

Motor

Mounting

Bracket

Adjusting

Tube

Adjusting

Nuts

Side

Bracket

T317PE1B_

Jackshaft Assembly

Jackshaft

Assembly

Attaching

Screws

a. Support corner drive guard and remove

screws holding corner guard to rear of tumbler.

b. Support drive guard cover and remove screws

that hold guard to rear of tumbler.

c. Loosen the four jackshaft assembly attaching

screws. Refer to Figure 4.

d. Loosen adjusting nuts on outer eyebolt and

rotate bottom nut clockwise until proper

tension is reached. e. Retighten all nuts and screws. f. Readjust drive belt.

IMPORTANT: Adjusting the cylinder belt tension WILL AFFECT the drive belt tension. You MUST check and readjust the drive belt tension after adjusting the cylinder belt tension.

23.Cylinder Clearance

The clearance between the cylinder rim and front panel must be adjusted so the cylinder is centered

34 70422201

Figure 3

Figure 4

within the front panel opening when the cylinder is fully loaded and is turning. However, the adjustment should be made when the cylinder is empty.

NOTE: If the cylinder is not properly adjusted, the cylinder rim will rub against the front panel.

a. Open loading door. b. Check the gap between the center of the front

panel top flange and the cylinder rim. Proper

adjustment is when the gap is 8/32 inch ± 3/32

inch. Refer to Figure 5. Perform steps d

through i to adjust the cylinder rim/front panel

flange clearance. c. Check the cylinder fore/aft clearance between

the inside front of the cylinder and the edge of

the front panel flange. Proper adjustment is

when the gap is 9/32 inch ± 1/32 inch. Refer

to Figure 5. Perform steps j through n to

adjust the cylinder fore/aft clearance.

Cylinder Rim/Front Panel Flange Clearance Adjustment

a. Support corner drive guard and remove

screws holding corner guard to rear of

tumbler. b. Support drive guard cover and remove screws

holding guard to rear of tumbler. c. Loosen rear bearing mounting screws. Refer

to Figure 6. d. Loosen the locknuts on rear adjustment

screws. Refer to Figure 6. e. Turn the adjusting screws in or out as

necessary to obtain proper clearance between

cylinder rim and front panel.

Adjustments

NOTE: Turning the adjusting screws clockwise will raise the cylinder and turning them counterclockwise will lower the cylinder. Turn both screws evenly to adjust top and bottom clearance. Turn one or the other adjusting screw in or out to adjust side clearance.

f. After the cylinder is properly adjusted, tighten

the adjusting screw locknuts and the rear

bearing mounting screws. g. Install drive guard cover.

NOTE: If adjusting the trunnion housing fails to correct the clearance, the problem is probably due to a worn trunnion shaft or defective bearings.

70422201 35

Adjustments

Inside Front

of Cylinder

Cylinder

Rim

Front Panel

Flange

(Top Shown)

Fore / Aft

Clearance

Cylinder Rim /

Front Panel Flange

Clearance

8/32" ± 3/32"

9/32" ± 1/32"

Cylinder Fore/Aft Clearance Adjustment

h. Support corner drive guard and remove

screws holding corner guard to rear of

tumbler. i. Support drive guard cover and remove screws

holding guard to rear of tumbler. j. Loosen setscrews in the front bearing

assembly collar and rear bearing assembly

collar. Refer to Figure 6.

k. Move cylinder assembly in or out as

necessary to obtain proper clearance between the cylinder and the front panel.

l. After the cylinder is properly adjusted, tighten

setscrews in the front and rear bearing assembly collars.

m. Install drive guard cover.

TMB1786S

Figure 5

36 70422201

Adjustments

TMB1787S

Rear

Bearing Mounting

Screw

Rear

Bearing Assembly

Collar

Front

Bearing Assembly

Collar

Front

Adjusting

Screw

Rear

Adjusting

Screw

24.Drive Belt Tension

Refer to Figure 3.

NOTE: If cylinder belts will be adjusted, service them before drive belt.

120 Pound Models:

NOTE: Belt tension from step pulley to cylinder shaft pulley can be measured to ensure proper installation in one of the following ways:

• Burroughs Belt Tension Gauge initial reading 70-80 pounds.

• Force to deflect belt .38 inch at midspan with initial tensioning 6.5 pounds.

• Burroughs Belt Tension Gauge reading after run 55-65 pounds.

170 Pound Models:

NOTE: Belt tension from cylinder drive motor pulley to step pulley can be measured to ensure proper installation in one of the following ways:

• Burroughs Belt Tension Gauge initial reading 6070 pounds.

• Force to deflect belt .38 inch at midspan with initial tensioning 6.0 pounds

70422201 37

Figure 6

• Burroughs Belt Tension Gauge reading after run 45-55 pounds.

a. Support corner drive guard and remove screws

holding corner guard to rear of tumbler.

b. Support drive guard cover and remove screws

holding guard to rear of tumbler. c. Reinstall drive guard. d. Loosen the two motor bracket pivot screws.

Refer to Figure 3. e. Turn the adjusting nuts clockwise until proper

tension is reached. Refer to Figure 3.

f. Retighten all nuts and screws.

25.Fan Belt Tension

Refer to Figure 7.

120 Pound Models:

NOTE: Belt tension from fan motor pulley to fan shaft pulley can be measured to ensure proper installation in one of the following ways:

• Burroughs Belt Tension Gauge initial reading 6070 pounds.

• Force to deflect belt .38 inch at midspan with initial tensioning 7.0 pounds

• Burroughs Belt Tension Gauge reading after run

50-55 pounds.

Adjustments

T213SE1A

Fan

Belt

Fan

Pulley

Mounting

Bracket Attaching

Screws

Eye

Bolt

Fan

Motor

Pulley

170 Pound Models:

NOTE: Belt tension from fan motor pulley to fan shaft pulley can be measured to ensure proper installation in one of the following ways:

• Burroughs Belt Tension Gauge initial reading 7580 pounds.

• Force to deflect belt .38 inch at midspan with initial tensioning 5.0 pounds

• Burroughs Belt Tension Gauge reading after run 60-65 pounds.

a. Support corner drive guard and remove

screws holding corner guard to rear of tumbler.

b. Support drive guard cover and remove screws

holding guard to rear of tumbler.

c. Loosen the two mounting bracket attaching

screws.

d. Raise or lower eye bolt until proper tension is

reached.

e. Retighten all nuts and screws.

38 70422201

Figure 7

Section 5

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam 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.

W002

WARNING

Hybrid Timer Control Troubleshooting

70422201 39

Hybrid Timer Control Troubleshooting

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 acr oss

2 & 3 of transformer

secondary?

Is there volt age acr oss

terminals H1-3 &

H1-1 on hybrid timer?

Check H6-1 (+) and H6-2 (-) for +5 VDC.

Connect supply

voltage and run unit.

Correct wiring

between primary

fuse and supply.

Replace primar y

fuse.

Correct wiring

between transformer

and primary fus e.

Replace transformer

Correct wiring

between hybrid timer

and transformer

secondary.

Replace hybrid

control assembly.

YES

(1)

(6)

(2)

(3)

(4)

(5)

NO

YES

Replace display

assembly.

Gas, steam and electric heat.

Single and three phase supply.

Note: Reference volt

age to

supply neutral.

TMB2000S

26.Control Has No Display

40 70422201

Control Has No Display

TMB2357S

5

1

2

3

4

6

TMB2357S

Hybrid Timer Control Troubleshooting

70422201 41

Hybrid Timer Control Troubleshooting

Is there voltage between

H4-7 & H1-3 on

the control?

Replace hybrid

control.

Is there power supplied

to the unit?

NO

Is there voltage at input

of primary fuses?

Is there voltage at

output side of the

primary fuses?

Is there voltage

across the

transformer primary?

Plug unit in and run

it.

Correct wiring

between primary

fuse and power

supply.

Replace primary

fuse(s).

Correct wiring

between primary

fuse and

transformer.

Is there voltage across

terminals 2 &

3 of transformer

secondary?

Replace

transformer.

Is there voltage at

the input of the

secondary fuse?

Is there voltage at

output side of

secondary fuse?

Correct wiring

between secondary

fuse and

transformer.

Replace secondary

fuse.

Correct wiring between

lint panel switch

and hybrid control.

YES

NO

YES

(1)

(2)

(3)

(4)

(5)

(6)

(7)

Is there voltage

at COM of

door switch?

Connect wiring

between COM and

output of secondary

fuse.

YES

NO

(8)

With door closed,

is there voltage

to NO of door

switch?

Replace

door switch.

YES

NO

(9)

(10)

(11)

With lint panel closed, is there

power at NO

connection?

Replace

lint panel switch.

YES

NO

Is there voltage

at COM of the

lint panel

switch?

Connect wiring

between door switch

and COM of lint

panel switch.

YES

NO

TMB2052S

Gas, steam and electric heat.

Single and three phase power supply.

27.Display Flashes “dr” With Door Closed

42 70422201

Hybrid Timer Control Troubleshooting

TMB2357S

2

3

4

5

6

7

11

8

9

10

1

Display Flashes “dr” With Door Closed

70422201 43

Hybrid Timer Control Troubleshooting

28.Motor Will Not Start/Run

Note: test conducted with vend

(1)

price satisfied and start button

Is there voltage across

H4-7 and H4-4 on

the electronic control ?

YES

(2)

Is there voltage

across H4-3 and H4-4

on the electronic control?

YES

(3)

Is there voltage across the coil of the motor control

relay?

YES

NOTE: Please use the

appropriate wiring diagram

from the following pages.

pressed.

NO

Refer to Control Has No

Display - OPL Models

flowchart.

Replace

control.

Correct wiring to coil

of motor relay .

Gas, electric and steam heat.

Single and three phase power supply.

Is there voltage

across the lines of

the fan motor?

Is there voltage at

the input side of motor

control relay?

Is there voltage at

the output side of motor

control relay?

YES

(6)

NO

(7)

NO

(8)

NO

(9)

Correct wiring

between fan motor

and motor control

relay.

Correct wiring

between terminal 6

of motor control

relay and supply.

Replace motor

control relay.

(4)

Is there voltage at

the input side of the

motor control relay?

YES

(5)

Is there voltage at

the output side of motor

control relay?

YES

NO

Correct wiring

between control relay

and power supply.

Replace motor

control relay.

Is there voltage

across the lines of

cylinder motor?

YES

Does the cylinder

motor run?

YES

Motors are

operational.

NO

Correct wiring between cylinder motor and motor

control relay.

Replace cylinder

r.

moto

TMB2046S

44 70422201

Hybrid Timer Control Troubleshooting

TMB2357S

1

2

3

4

5

6

7

8

9

Motor Will Not Start/Run

70422201 45

Hybrid Timer Control Troubleshooting

Note: Tests are conducted with unit running

and calling for heat.

All voltage checks are referenced to

transformer neutral.

Correct wiring

between terminal 13

on motor control

and H4-1 on

hybrid control.

Is there voltage at

terminal 13 of motor

control relay?

Replace motor

control relay.

Is there voltage at

terminal 14 of

motor control relay?

Correct wiring

between terminal 3

of fan motor

centrifugal switch

and terminal 4 of

motor control rela

y

.

Is there voltage at

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 side of

the cabinet

limit?

Correct wiring

between stove limit

and cabinet limit.

Is there voltage to the

input side of the

stove

limit?

Is the

thermistor

operational?

Replace hybrid

control.

Replace

thermistor

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

Replace stove limit.

NO

YES

Is there voltage

at the output side of

the stove

limit?

Correct wiring

between terminal 2

of ICM and stove

limit.

Is there voltage to

terminal 2 of

the Ignit

ion Control

Module (ICM)?

NO

(10)

Is there

voltage at H4-1

of hybrid control?

TMB2358S-a

29.Unit Will Not Heat – Gas

46 70422201

29.Unit Will Not Heat – Gas (continued)

TMB2006S

TMB2358S-b

Replace ICM board.

Is there voltage at

terminal 1 of ICM

board?

Correct wiring

between gas valve

and ICM board.

Is there voltage across

the coils of the gas

valve?

NO

YES

NO

(11)

(12)

Note: Make sure unit is

not in a lock out

condition.

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?

NO

YES

NO

YES

Unit operational.

Is there a flame?

YES

NO

Hybrid Timer Control Troubleshooting

Please see following page for wiring diagram information.

70422201 47

Hybrid Timer Control Troubleshooting

TMB2357S

1

2

3

4

5

6

7

8

9

10

11

12

Unit Will Not Heat – Gas

48 70422201

30.Error Codes

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam 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.

W002

WARNING

Display Definition Corrective Action

OP

SH

AF-1

AF-2

AF (flashing)

Hybrid Timer Control Troubleshooting

Open thermistor error. • Check thermistor. Replace if inoperative.

• Check wiring between control and thermistor. Refer to wiring diagram for proper wiring.

• Check control. Replace if inoperative.

Shorted thermistor error. • Check thermistor. Replace if inoperative.

• Check wiring between control and thermistor. Refer to wiring diagram for proper wiring.

• Check control. Replace if inoperative.

Airflow switch closed when cycle started. • Check airflow switch. Replace if

inoperative.

Airflow switch failed to closed after cycle started.

Airflow switch opened/closed 5 or more times in a running cycle.

• Check airflow switch. Replace if inoperative.

70422201 49

Section 6

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the tumbler before servicing.

• Close gas shut-off valve to gas tumbler before servicing.

• Close steam valve to steam 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.

W002

WARNING

On Premise Micro Control (RM)

Troubleshooting

50 70422201

31.Control Has No Display

Control Has No

Display

Is there

power supplied

to the unit?

Is there

120 VAC

at input of

primary fuses?

Yes

Plug unit in

and start cycle.

No

Correct wiring

between primary

fuse and power

supply.

No

Is there

120 VAC across

terminals 1 & 2 of

transformer

primary?

No

Correct wiring

between primary

fuse and

transformer.

Is there

24 VAC across

terminals 1 &

4 of transformer

secondary?

No

Replace

transformer.

TMB2320S

Yes

No

Correct wiring

between

transformer and

control.

Is there

24 VAC across

H3-3 and H3-4 on

the control?

Yes

Is there

120 VAC at

output side of the

primary fuses?

No

Replace primary

fuse(s).

Yes

Gas and steam heat. Three phase power supply.

(1)

(2)

(3)

Is the

control fuse

functional?

Replace

control fuse.

Replace

control.

Yes

No

(4)

(5)

(6)

Yes

On Premise Micro Control (RM) Troubleshooting

70422201 51

On Premise Micro Control (RM) Troubleshooting

4

2

3

5

1

6

Control Has No Display

52 70422201

TMB2319S

32.Door Open Indicator

On Premise Micro Control (RM) Troubleshooting

Door Open

Indicator

(1)

Is there

24 VAC between

H2-8 and

H2-9?

No

Is there

power supplied

to the unit?

Yes

(2)

Is there

120 VAC at input

of primary fuses?

Gas and steam heat. Three phase power supply.

Yes

Replace control.

No

Plug unit in and

start cycle.

Correct wiring

No

between primary fuses and power

supply.

Reference voltage checks to transformer neutral.

(5)

Is there

24 VAC across

terminals 2 &

3 of transformer

secondary?

Yes

(6)

Is there

24 VAC at the

input of the secondary

fuse?

Yes

(7)

No

Replace

transformer.

Correct wiring

between

secondary

fuse and

transformer.

Yes

(3)

Is there

120 VAC at

output side of the

primary fuses?

Yes

(4)

Is there

120 VAC across

terminals 1 & 2 of

transformer

primary?

Yes

No

Replace primary

fuse(s).

Correct wiring

No

between primary

fuses and

transformer.

Is there

24 VAC at output

side of secondary

fuse?

Yes

(8)

Is there

24 VAC at COM

of door switch?

Yes

Continued on

secondary fuse.

No

Correct wiring

between COM

secondary fuse.

Replace

and output of

TMB2321S-a

70422201 53

On Premise Micro Control (RM) Troubleshooting

With door

closed is there 24

VAC to N.O. of

door switch?

Is there

24 VAC at COM

of lint panel

switch?

Yes

Check for proper

function of door

switch, replace if

necessary.

No

Correct wiring

between N.O. on

door switch and

COM on lint panel

switch.

No

TMB2321S-b

Is there

24 VAC at N.O.

of lint panel switch

with lint panel

closed?

No

Check lint panel switch for proper

operation, replace

if necessary.

Yes

(9)

(11)

Correct wiring

between H2-8 of

electronic control

and N.O. of lint

panel switch.

Continued from

Yes

32.Door Open Indicator (continued)

54 70422201

Please see following page for wiring diagram information.

On Premise Micro Control (RM) Troubleshooting

TMB2319S

4

2

3

5

6

7

1

8

9

11

10

Door Open Indicator

70422201 55

On Premise Micro Control (RM) Troubleshooting

33.Motor Will Not Start/Run

Gas and steam heat. Three phase power supply.

Note: For high voltage three phase supply (200 volts or higher), the motor is supplied by L1, L2, L3 through the motor contactor terminals T1, T2, T3. Make the appropriate adjustments when doing voltage checks.

Motor Will Not

Start/Run

(1)

Is there

voltage between

H2-7 and H3-4?

Yes

(2)

Is there

24 VAC across

the coil of the motor

control relay?

Yes

(3)

Is there

supply voltage

at L1-L2, L2-L3 and

L1-L3 at the motor

contactor?

Yes

(4)

Is there

supply voltage

across T1-T2, T2-T3

and T1-T3 on the

motor contactor?

Note: Test conducted with vend price satisfied and start button pressed.

No

Replace

control.

Correct wiring

to coil of

motor relay .

Correct wiring

No

between L1, L2,

L3 and power

No

Replace motor

control relay.

supply.

56 70422201

Yes

(5)

Is there

supply voltage

between L1-L2, L2-L3

and L1-L3

of motor?

Yes

Replace

motor.

Correct wiring

No

between motor

and motor contactor.

TMB2370S

On Premise Micro Control (RM) Troubleshooting

TMB2319S

2

4

5

1

3

Motor Will Not Start/Run

70422201 57

On Premise Micro Control (RM) Troubleshooting

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

switch?

Unit Will Not

Heat – Gas

Is there

voltage at H2-5

and H3-4 of

control?

Is there

voltage on BRN

wire on motor

contactor?

Yes

Replace

thermistor.

Correct wiring

between H2-5 and

motor contactor.

No

Is there

voltage to the

input of the

cabinet limit?

No

Correct wiring

between cabinet

limit and terminal

5 of fan motor.

Is there

voltage to the

output of the

cabinet

limit?

No

Check cabinet limit for proper

operation.

Replace

if necessary.

TMB2359S-a

Yes

No

Correct wiring

between airflow

switch and

cabinet limit.

Is there

voltage to the

common of the

airflow

switch?

Yes

Is there

voltage at ORG/WHT

wire on motor

contactor?

Yes

All voltage checks are referenced to transformer neutral.

(1)

(4)

(8)

(9)

(2)

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

Is the

thermistor

operational?

No

Replace

control.

(5)

Replace motor

contactor.

No

Yes

No

(3)

Check for proper

operation of

airflow switch.

Replace if

necessary.

Yes

No

Is there

voltage to the

input of the

stove limit?

Correct wiring

between stove

limit and normally

open terminal of

the airflow switch.

(10)

Yes

No

Continued on

Is there

voltage to terminal 3

of the motor

contactor?

(6)

Correct wiring

between motor

terminal 3 and

motor contactor.

Is there

voltage at terminal

5 of the fan

motor?

No

Yes

Yes (Gas)

Yes (Steam)

Check motor for

proper operation.

Replace if

necessary.

No

(7)

Yes

See next

page

34.Unit Will Not Heat – Gas/Steam

58 70422201

34.Unit Will Not Heat – Gas/Steam (continued)

TMB2359S-b

Is there

voltage to the

output side of the

stove limit?

Is there

voltage to terminal 2 of the Ignition Control

Module (ICM)?

Yes

Check operation

of stove limit.

Replace if

necessary.

No

Correct wiring

between terminal 2

of ICM and stove

limit.

No

Is there

voltage at

terminal 1 of

ICM board?

No

Replace

ICM board.

Yes

(11)

(13)

Continued from

Note: Make sure unit is not in a lockout condition.

Is there

voltage across

the coils of the

gas valve?

No

Correct wiring

between gas

valve and

ICM board.

(14)

Yes

Is there gas flow

through the gas

valve?

Replace gas

valve coils or

complete

gas valve.

Yes

No

Does the igniter

spark?

Replace high voltage ignition cable, igniter or

ICM board.

Is there a

flame?

Unit

operational.

Yes

No

Yes

No

Yes (Gas)

Yes (Steam)

Continued from

24 VAC across

the coil of the

steam valve?

No

Correct wiring

between steam

valve coil and

motor.

Does the

steam valve

coil have

continuity?

No

Replace the steam valve

coil.

Yes

No

Connect the

steam supply.

Is the steam

supply

functional?

Yes

Replace or

rebuild the

steam valve.

Yes

On Premise Micro Control (RM) Troubleshooting

Please see following page for wiring diagram information.

70422201 59

On Premise Micro Control (RM) Troubleshooting

TMB2319S

2

3

13

14

4

5

6

7

8

9

10

11

12

15

1

Unit Will Not Heat – Gas/Steam

60 70422201

On Premise Micro Control (RM) Troubleshooting

To reduce the risk of electric shock, fire, explosion, serious injury or death:

• Disconnect electric power to the dryer(s) before servicing.

• Close gas shut-off valve to gas dryer(s) before servicing.

• Never start the dryer(s) with any guards/panels removed.

• Whenever ground wires are removed during servicing, these ground wires must be reconnected to ensure that the dryer is properly grounded.

W001R1

WARNING

35.Error Codes

OP - Indicates physical “open” in the thermistor circuit. Possible causes are: 1) thermistor, 2) wiring between control 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.

Display Definition Corrective Action

OP

SH

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.

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.

70422201 61