Alliance Laundry Systems AT120FG, SC120FG, DT120FG, JT120FG, ST120FG Service Manual

...

Drying Tumblers

120 Pound Capacity

Refer to Page 5 for Model Numbers

LOAD READY

LOW

AIR FLOW

H I G

L O

M E D

I U M

NON

REV

TEMPERATURE

REV

PUSH

PUSH TO

COOLING

COOLING START

START

DRYING

60 0

0 30

10 20

Service

www.comlaundry.com

T021C

Part No. M412982R1

April 2002

Section 1 – Safety Information

Locating An Authorized Service Person .................4

Section 2 – Introduction

Model Identification ................................................5

Customer Service ....................................................6

Serial Plate Location ...............................................6

Safety Warnings and Decals ...................................7

Safety Precautions for Servicing Tumblers ............7

Section 3 – Troubleshooting

1. Motor Does Not Start .......................................9

2. Motor Overload Protector Cycles Repeatedly ... 10

3. Motor Runs But Cylinder Does Not Turn. .....10

4. Motor Does Not Stop .....................................10

5. Gas Burner Does Not Ignite ...........................11

6. Burner Ignites And Goes Out Repeatedly .....12

7. Burner Shuts off Prematurely ........................12

8. Burner Repeatedly Cycles Off On High

Limit Thermostat ............................................13

9. Steam Valve or Burner Does Not Shut-off ...13

10. Clothes Do Not Dry .......................................14

11. Tumbler Overheating .....................................14

12. Burners Not Burning Properly - Gas Models 15

13. Loading Door Opens During Operation ........15

14. Tumbler Runs But No Steam To Coils

- Steam Models ..............................................15

15. Water In Steam Line - Steam Models ............16

16. Tumbler Will Not Start, Time On Drying

Timer, Door Closed ........................................17

17. Motor Runs But Will Not Heat ......................18

18. Cylinder Turns, But Will Not Heat ................19

Section 4 – Grounding

19. Grounding Instructions ..................................21

Section 5 – Service Procedures

20. Access Panel/Control Box .............................23

21. Loading Door Assembly ................................23

22. Loading Door Hinge Brackets .......................23

23. Loading Door Hinges .....................................24

24. Loading Door Handle ....................................24

25. Front Panel .....................................................25

26. Loading Door Switch .....................................26

27. Push-to-start Switch .......................................26

28. Cooling And Drying Run Lights ...................26

29. Relay ..............................................................26

30. Cooling and Drying Timers ...........................27

31. Reversing/Nonreversing Switch ....................28

32. Control Thermostat ........................................28

33. Micro control .................................................29

34. Emergency Stop Button - DC, JC and SC

Models ............................................................31

35. Ignition Reset Switch - DC, JC and SC

Gas Models ....................................................31

36. Fuse Holder ....................................................31

37. Signal Buzzer .................................................31

38. Gas Valve .......................................................33

39. Igniter .............................................................33

40. Ignition Control ..............................................33

41. Burner Tube ...................................................33

42. Stove High Limit Thermostat ........................34

43. Cabinet High Limit Thermostat/ Load Ready

Thermostat .....................................................34

44. Steam Coils ....................................................35

45. Airflow Switch ...............................................35

46. Drive Guard Cover .........................................36

47. Cylinder Belt ..................................................37

48. Drive Belt .......................................................38

49. Step Pulley Assembly ....................................38

50. Cylinder Sheave .............................................38

51. Motor Pulley ..................................................39

52. Jackshaft Assembly ........................................39

53. Cylinder Assembly ........................................39

54. Trunnion Bearings .........................................40

55. Fan Motor And Fan Assembly .......................41

56. Fan .................................................................41

57. Trunnion Shaft Assembly ..............................42

58. Cylinder Drive Motor ....................................43

59. Reversing Timer ............................................44

60. Reversing Contactor ......................................44

61. Fan Motor Contactor ......................................44

62. Transformer ...................................................44

(continued)

the expressed written consent of the publisher.

M412982 1

Section 6 – Adjustments

63. Leveling .........................................................47

64. Main Gas Burner Air Inlet Shutters ...............48

65. Airflow Switch ...............................................49

66. Loading Door Switch .....................................49

67. Loading Door Strike ......................................49

68. Drive Belt Tension .........................................50

69. Cylinder Belt ..................................................51

Section 7 – Wiring Schematics .........................55

AT, DT, JT and ST Manual Timer Models

208-230 VAC, 60 Hertz, 3 Phase Gas .............56

380-415 VAC, 50 Hertz, 3 Phase Gas .............57

460 VAC, 60 Hertz, 3 Phase Gas ....................58

208-230 VAC, 60 Hertz, 3 Phase Steam ..........59

380-415 VAC, 50 Hertz, 3 Phase Steam ..........60

460 VAC, 60 Hertz, 3 Phase Steam..................61

DC, JC and SC Manual Timer Models

380-415 VAC, 50 Hertz, 3 Phase Gas .............62

380-415 VAC, 50 Hertz, 3 Phase Steam .........63

Micro Control MM Models

208-240 VAC, 60 Hertz, 3 Phase Gas ..............64

480 VAC, 60 Hertz, 3 Phase Gas .....................65

208-240 VAC, 60 Hertz, 3 Phase Steam ..........66

480 VAC, 60 Hertz, 3 Phase Steam..................67

AT, DT, JT and ST Micro Control OM Models

208-230 VAC, 60 Hertz, 3 Phase Gas ..............68

380-415 VAC, 50 Hertz, 3 Phase Gas .............69

460-480 VAC, 60 Hertz, 3 Phase Gas .............70

208-230 VAC, 60 Hertz, 3 Phase Steam ..........71

380-415 VAC, 50 Hertz, 3 Phase Steam .........72

460-480 VAC, 60 Hertz, 3 Phase Steam .........73

DC, JC and SC Micro Control OM Models

380-415 VAC, 50 Hertz, 3 Phase Gas .............74

380-415 VAC, 50 Hertz, 3 Phase Steam .........75

2 M412982

Section 1

Safety Information

Throughout this manual and on machine decals, you will find precautionary statements (i.e. “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.

a DANGER

Danger indicates the presence of a hazard that will cause severe personal injury, death or substantial property damage if the danger is ignored.

a WARNING

Warning indicates the presence of a hazard that can cause severe personal injury, death or substantial property damage if the warning is ignored.

a CAUTION

Caution indicates the presence of a hazard that will or can cause minor personal injury or property damage if the caution is ignored.

Additional precautionary statements (i.e. “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.

WARNING

• 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 that you understand and have the skills to carry out.

• 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.

W006R1

M412982 3

Section 1 Safety Information

IMPORTANT INFORMATION: During the lifetime of your 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 your tumbler, and who are equipped with the proper tools and testing equipment.

WARNING

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

CAUTION

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.

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.

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.

W008

4 M412982

Section 2

Introduction

Model Identification

Information in this manual is applicable to these models:

Gas Steam/Thermal Oil

AT120FG DC120FG DT120FG

JC120FG

JT120FG SC120FG ST120FG

AT120CSH DC120CSH DT120CSH

JC120CSH JT120CSH

SC120AT

SC120CSH

ST120AT

ST120CSH

M412982 5

Section 2 Introduction

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.

SERIAL

PLATE

JUNCTION BOX

COVER

TMB1497S

6 M412982

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.

Section 2 Introduction

• 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.

M412982 7

Section 3

Troubleshooting

WARNING

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.

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

1. MOTOR DOES NOT START

POSSIBLE CAUSE TO CORRECT

Electrical power off, blown control fuse or circuit breaker tripped.

Inoperative transformer. • Replace transformer. Loading door not closed or inoperative door switch. • Close door or test switch and replace if inoperative. Door switch improperly adjusted. • Refer to Adjustment Section in manual for door switch

Trunnion bearings binding. • Replace trunnion bearings. Start circuit not completed. • Press start switch or test switch and replace if inoperative. Idler bearings binding. • Replace bearings. Inoperative motor. • Have motor tested and replace if inoperative. Inoperative relay. • Replace relay. Timer improperly set. • Turn drying timer clockwise to desired setting. Inoperative timer. • Test timer and replace if inoperative. Broken, loose or incorrect wiring. • Refer to wiring diagram located on back of tumbler or in

• Check service to tumbler.

adjustment.

literature packet.

W002

M412982 9

Section 3 Troubleshooting

WARNING

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.

2. MOTOR OVERLOAD PROTECTOR CYCLES REPEATEDLY

POSSIBLE CAUSE TO CORRECT

Incorrect voltage. • Refer to Installation Manual (supplied with tumbler) for

electrical requirements.

Clothes load too large. • Remove part of load. Cylinder binding. • Check cylinder for binding. Refer to Adjustment Section

in this manual for cylinder adjustment.

Inadequate wiring. • Check with local power company to ensure that wiring is

adequate.

Inadequate make-up air. • Refer to Installation Manual (supplied with tumbler) for

make-up air requirements. Poor housekeeping. • Clean lint accumulation on and around the motor. Broken, loose or incorrect wiring. • Refer to wiring diagram located on back of tumbler or in

literature packet.

W002

3. MOTOR RUNS BUT CYLINDER DOES NOT TURN.

POSSIBLE CAUSE TO CORRECT

Motor drive pulley loose. • Tighten drive pulley bushing screws. Broken or loose cylinder belts. • Replace or adjust belts. Broken or loose drive belt. • Replace or adjust belt. Cylinder binding. • Check cylinder for binding. Refer to Adjustment Section

in this manual for proper cylinder adjustment.

4. MOTOR DOES NOT STOP

POSSIBLE CAUSE TO CORRECT

Inoperative door switch or switch is out-ofadjustment.

• Test switch and replace if inoperative. Refer to

Adjustment Section in this manual for proper switch

adjustment. Inoperative timer. • Test timer and replace if inoperative. Incorrect wiring. • Refer to wiring diagram located on back of tumbler or in

literature packet. Inoperative motor contactor. • Test motor contactor and replace if inoperative.

10 M412982

Section 3 Troubleshooting

WARNING

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.

5. GAS BURNER DOES NOT IGNITE

POSSIBLE CAUSE TO CORRECT

Improper or inadequate exhaust system. • Refer to the Installation Manual (supplied with tumbler)

for exhaust system requirements. Drying timer not selected or inoperative. • Set drying timer or replace if inoperative. Inoperative thermostat. • Test thermostat and replace if inoperative. Insufficient gas supply. • 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 gas supplier check main pressure. Incorrect orifices. • 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. Inoperative igniter. • Test igniter and replace if inoperative. Inoperative igniter control. • Test igniter control and replace if inoperative. Inoperative gas valve coils. • Test coils and replace complete gas valve if inoperative. Lint buildup. • Clean lint compartment after every eight-hour shift.

Check back draft damper for lint accumulation. Check

ductwork for lint build-up. Inadequate ductwork and make-up air. • Refer to Installation Manual (supplied with tumbler) to

ensure that ductwork and make-up air openings are sized

properly. Inoperative airflow switch. • Test switch and replace if inoperative. Airflow switch out of adjustment. • Refer to Adjustment Section in this manual for airflow

switch adjustment. Lint door panel not closed properly. • Open lint door panel, place lint door and panel back on

tumbler (ensuring a tight fit). Broken, loose or incorrect wiring. • Refer to wiring diagram located on back of tumbler or in

literature packet. Improper fan rotation. • May be due to improper wiring resulting in low air flow.

Refer to Installation Manual.

W002

M412982 11

Section 3 Troubleshooting

WARNING

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.

6. BURNER IGNITES AND GOES OUT REPEATEDLY

POSSIBLE CAUSE TO CORRECT

Insufficient gas pressure. • Check gas supply and pressure. Low flame will not

maintain sensor conductivity. Burner ports plugged. • Check burner tubes for build-up. Improper or inadequate exhaust system or make-up

air Inoperative high limit or cabinet limit thermostat. • Test thermostat and replace if inoperative. Improper orifices. • Tumbler is equipped for type of gas specified on serial

• Refer to Installation Manual (supplied with tumbler) for

exhaust and make-up air requirements.

plate. If orifices are different from that specified on serial

plate, obtain and install proper orifices.

W002

7. BURNER SHUTS OFF PREMATURELY

POSSIBLE CAUSE TO CORRECT

Improper or inadequate exhaust and/or make-up air system.

• Refer to Installation Manual (supplied with tumbler) for

exhaust and make-up air requirements. Insufficient gas supply. • Open partially closed gas shut-off valve or correct low

pressure. Tumbler not properly equipped for type of gas used. • 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. Improperly adjusted burner flame. • Refer to Adjustment Section in this manual for burner

flame adjustment. Cycling off on high limit thermostat. • Refer to Paragraph 8. Broken, loose or incorrect wiring. • Refer to wiring diagram located on back of tumbler or in

literature packet. Improper fan rotation. • May be due to improper wiring resulting in low air flow.

Refer to Installation Manual.

12 M412982

Section 3 Troubleshooting

WARNING

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.

8. BURNER REPEATEDLY CYCLES OFF ON HIGH LIMIT THERMOSTAT

POSSIBLE CAUSE TO CORRECT

External exhaust system is longer than recommended or inadequate make-up air.

• Refer to Installation Manual (supplied with tumbler) for

exhaust and make-up air requirements. Clogged lint screen. • Remove screen and clean. Lint screen and compartment

should be cleaned after every eight hour shift. Lint in internal tumbler ductwork. • Disassemble tumbler ductwork and clean. Lint in external exhaust system. • Disassemble exhaust system and clean. High limit thermostat cycling at too low a

• Replace thermostat.

temperature. Lint door panel not closed properly. • Remove lint door panel - place lint door panel back on

tumbler (ensuring a tight fit). Improper fan rotation. • May be due to improper wiring resulting in low air flow.

Refer to Installation Manual.

W002

9. STEAM VALVE OR BURNER DOES NOT SHUT-OFF

POSSIBLE CAUSE TO CORRECT

Impurities on gas or steam valve seat, preventing

• Replace gas valve or disassemble and clean steam valve.

valve from closing. Inoperative drying timer. • Replace timer. Incorrect wiring. • Refer to wiring diagram located on back of tumbler or in

literature packet.

M412982 13

Section 3 Troubleshooting

WARNING

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.

10. CLOTHES DO NOT DRY

POSSIBLE CAUSE TO CORRECT

Heat source inoperative. • Refer to Paragraph 17. Too much water in articles being dried. • Remove excess water. Clothes load too large. • Remove part of load. 120 pounds dry weight (AHAM

cotton load) is maximum load. Improper or inadequate exhaust system. • Refer to Installation Manual (supplied with tumbler) for

exhaust requirements. Heat source shuts off prematurely. • Refer to Paragraph 18. Drying timer improperly set. • Set selector for higher setting. Incorrect voltage. • Refer to Installation Manual (supplied with tumbler) for

electrical requirements. Inadequate make-up air. • Refer to Installation Manual (supplied with tumbler) for

make-up air requirements. Improper fan rotation. • May be due to improper wiring resulting in low air flow.

Refer to Installation Manual.

W002

11. TUMBLER OVERHEATING

POSSIBLE CAUSE TO CORRECT

Gas Models: Incorrect main burner orifices. • Replace orifices. Gas Models: Gas pressure too high. • Adjust gas pressure as specified on serial plate. Steam Models: Steam solenoid valve stuck open. • Clean solenoid valve and replace if necessary. Inadequate make-up air. • Refer to Installation Manual (supplied with tumbler) for

make-up air requirements. Lint accumulation. • Remove lint. Restricted or inadequate exhaust system. • Remove obstruction or lint build-up from exhaust

ductwork. Refer to the Installation Manual (supplied

with tumbler) for exhaust system requirements. Inoperative thermostat. • Replace thermostat.

14 M412982

Section 3 Troubleshooting

WARNING

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.

12. BURNERS NOT BURNING PROPERLY - GAS MODELS

POSSIBLE CAUSE TO CORRECT

Burner air shutters incorrectly adjusted. • Refer to Adjustment Section in this manual for proper

flame adjustment. Foreign material in burners. • Disassemble burners and remove obstruction. Gas pressure too high. • Check serial plate on back of tumbler for correct gas

pressure. Incorrect orifices. • 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. Restricted or blocked exhaust duct. • Disassemble and clean exhaust system. Airflow switch not functioning properly. • Check adjustment and replace airflow switch if necessary. Improper fan rotation. • May be due to improper wiring resulting in low air flow.

Refer to Installation Manual.

W002

13. LOADING DOOR OPENS DURING OPERATION

POSSIBLE CAUSE TO CORRECT

Door strike improperly adjusted. • Refer to Adjustment Section in this manual for door strike

adjustment. Tumbler improperly leveled. • Refer to Adjustment Section in this manual for leveling

adjustment.

14. TUMBLER RUNS BUT NO STEAM TO COILS - STEAM MODELS

POSSIBLE CAUSE TO CORRECT

Shut-off valve closed. • Check all valves in supply and return lines make sure they

are open. Blocked steam trap. • Remove trap and clean. Replace if inoperative. Inoperative solenoid valve. • Check operation of solenoid valve. Incorrect installation of check valve. • Check for inlet and outlet markings on check valve and

invert if necessary. Clogged strainer. • Remove strainer and clean.

M412982 15

Section 3 Troubleshooting

WARNING

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.

15. WATER IN STEAM LINE - STEAM MODELS

POSSIBLE CAUSE TO CORRECT

Incorrect installation of steam piping. • Refer to Installation Manual (supplied with tumbler) for

steam requirements. Trap functioning improperly. • Check trap for size and capacity. If trap is dirty or

sluggish, clean thoroughly or replace. Check return line

for high back pressure.

W002

16 M412982

Section 3 Troubleshooting

WARNING

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.

16. TUMBLER WILL NOT START, TIME ON DRYING TIMER, DOOR CLOSED

W002

CHECK FOR LINE

VOLTAGE INTO

TRANSFORMER

CHECK

ELECTRICAL SERVICE

TO TUMBLER

(Fuses/Circuit Breaker)

CHECK FOR

120 VOLTS OUT OF

DOOR SWITCH

CHECK FOR DOOR

SWITCH ACTUATOR

YES

FUNCTIONING

PROPERLY

NO NO

CHECK FOR CONTROL

(120 VAC) VOLTAGE OUT

OF TRANSFORMER

REPLACE

TRANSFORMER

YES YES YES

CHECK FOR

120 VOLTS AT

TERMINAL 3 OF

CONTROL RELAY

NO NO NO

CHECK FOR BROKEN

WIRE OR POOR

CONNECTION AT

HARNESS PLUG

YES

CHECK FOR

BLOWN CONTROL

CIRCUIT FUSE

YES

REPLACE

FUSE

CHECK FOR

120 VOLTS ACROSS

COIL TERMINALS OF

CONTROL RELAY

CHECK FOR

120 VOLTS ON

TERMINAL B OF

DRYING TIMER

NOYES

CHECK FOR

120 VOLTS INTO

DOOR SWITCH

CHECK FOR BROKEN

WIRE BETWEEN

FUSE AND

DOOR SWITCH

CHECK FOR

120 VOLTS ON

TERMINAL 1 OF

CONTROL RELAY

REPLACE

RELAY

YES

ADJUST

ACTUATOR

YES

REPLACE DOOR

SWITCH

CHECK FOR 120

VOLTS INTO

PUSH-TO-START

SWITCH

CHECK FOR

BROKEN WIRE

FROM CONTROL

RELAY TERMINAL 1

M412982 17

PRESS PUSH-TO-

YES

START SWITCH. CHECK FOR 120

VOLTS OUT OF

PUSH-TO-START

SWITCH.

REPLACE

PUSH-TO-START

SWITCH

120 VOLTS ACROSS

FAN CONTACTOR

CONNECTION AT

HARNESS PLUG

REPLACE

TIMER

CHECK FOR

COIL

CHECK FOR

BROKEN WIRE

OR POOR

YESYES

REPLACE

FAN CONTACTOR

Section 3 Troubleshooting

WARNING

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.

17. MOTOR RUNS BUT WILL NOT HEAT

W002

IGNITER

SPARKING

YES

GREEN WIRE

FROM IEI

CONTROL

CONNECTED TO

GROUND

TERMINAL

YES

GAS SHUT-OFF

VALVE TURNED ON

YES

120 VOLTS

PRESENT ON

BLACK WIRE FROM

IEI CONTROL

OPEN AND CLOSE

IN SAFETY

LOCKOUT

YES

DOOR

CONNECT GREEN

WIRE TO GROUND

TERMINAL

TURN ON

GAS SHUT-OFF

VALVE

REPLACE

IEI CONTROL

RESISTANCE OF

HIGH VOLTAGE

LEAD GREATER

THAN 28,000 OHMS

OR LESS THAN

10,500 OHMS

HIGH VOLTAGE

YES

REPLACE

LEAD

IGNITER GAP

IS NOT 5/32 INCH

(.397 CM) OR

CERAMIC CRACKED

YES

REGAP OR

REPLACE

IGNITER

REPLACE

IEI CONTROL

YES

CHECK GAS VALVE

COIL FOR OPEN

CIRCUIT

18 M412982

YES

REPLACE

GAS VALVE

Section 3 Troubleshooting

WARNING

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.

18. CYLINDER TURNS, BUT WILL NOT HEAT

W002

AIRFLOW LIGHT

GLOWING

GAS SHUT-OFF

VALVE OPEN

YES

120 VOLTS PRESENT AT OUTPUT

TERMINAL OF MAIN THERMOSTAT

120 VOLTS PRESENT AT INPUT

TERMINAL OF MAIN THERMOSTAT

FAN TURNING COUNTER-

YES

CLOCKWISE AS VIEWED

YES

FROM THE FRONT

REVERSE ANY TWO OF THE

ELECTRICAL SERVICE LEADS AT

THE FAN MOTOR CONTACTOR.

OPEN GAS SHUT-OFF VALVE

YES

CHECK FOR BROKEN OR LOOSE

WIRE TO IGNITION CONTROL

REPLACE MAIN THERMOSTAT

REFER TO INSTALLATION MANUAL

FOR MAKEUP AIR AND EXHAUST DUCT

REQUIREMENTS

120 VOLTS PRESENT AT

TERMINAL 6 OF RELAY

120 VOLTS PRESENT AT

TERMINAL 4 OF RELAY

120 VOLTS PRESENT AT OUTPUT TERMINAL OF STOVE HIGH LIMIT

120 VOLTS PRESENT AT INPUT

TERMINAL OF STOVE HIGH LIMIT

M412982 19

THERMOSTAT

YES

CHECK FOR BROKEN OR LOOSE

WIRE TO MAIN THERMOSTAT

120 VOLTS PRESENT ACROSS COIL

TERMINALS OF RELAY

CHECK FOR BROKEN OR

LOOSE WIRE TO RELAY

REPLACE STOVE HIGH LIMIT

THERMOSTAT

(continued on following page)

YES

REPLACE

RELAY

Section 3 Troubleshooting

18. CYLINDER TURNS, BUT WILL NOT HEAT (continued)

120 VOLTS PRESENT AT OUTPUT

TERMINAL OF AIRFLOW SWITCH

120 VOLTS PRESENT AT INPUT

TERMINAL OF AIRFLOW SWITCH

120 VOLTS PRESENT AT OUTPUT

TERMINAL OF EXHAUST HIGH LIMIT

THERMOSTAT

120 VOLTS PRESENT AT INPUT

TERMINAL OF EXHAUST HIGH LIMIT

THERMOSTAT

120 VOLTS PRESENT ON

RED WIRE OF FAN MOTOR

120 VOLTS PRESENT ON

BROWN WIRE OF FAN MOTOR

YES

CHECK FOR BROKEN OR LOOSE WIRE

TO STOVE HIGH LIMIT THERMOSTAT

REPLACE AIRFLOW SWITCH

CHECK FOR BROKEN OR LOOSE WIRE

TO AIRFLOW SWITCH

REPLACE EXHAUST HIGH LIMIT

THERMOSTAT

CHECK FOR BROKEN OR LOOSE WIRE

TO EXHAUST HIGH LIMIT THERMOSTAT

REPLACE FAN MOTOR

120 VOLTS PRESENT ON OUTPUT

TERMINAL OF FAN CONTACTOR AUX

CONTACT

120 VOLTS PRESENT ON INPUT

TERMINAL OF FAN CONTACTOR AUX

CONTACT

CHECK FOR BROKEN OR

LOOSE JUMPER WIRE TO CONTACTOR

CONTACTS

YES

CHECK FOR BROKEN OR LOOSE WIRE

TO FAN MOTOR

REPLACE FAN CONTACTOR

20 M412982

Section 4

Grounding

WARNING

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.

WARNING

To reduce the risk of fire and electric shock, check with a qualified serviceperson for proper grounding procedures. Improper connection of the equipment grounding conductor may result in a risk of electric shock.

W002

W068R1

WARNING

To reduce the risk of fire and electric shock if electrical supply is coming from a three phase service:

• If there is a “High Leg” or “Stinger Leg” it should be connected to L3.

19. GROUNDING INSTRUCTIONS

This tumbler must be grounded. In the event of malfunction or breakdown, grounding will reduce the risk of electric shock by providing the path of least resistance for electric current. This tumbler must be connected to a grounded metal, permanent wiring system or an equipment grounding conductor must be run with the circuit conductors and connected to the appropriate ground location.

NOTE: To ensure protection against shock, this tumbler MUST be electrically grounded in accordance with local codes, or, in the absence of local codes, with the latest edition of the National Electrical Code ANSI/NFPA No. 70. In Canada the electrical connections are to be made in accordance with CSA C22.1 or the latest edition of the Canadian Electrical Code, Part I and/or local codes. Electrical work should be done by a qualified electrician.

WARNING

All electrical connections should be made by a qualified electrician.

To reduce the risk of electrical shock, deenergize the electrical circuit being connected to the tumbler before making any electrical connections. Never attempt to connect a live circuit.

W070

W446

M412982 21

Section 5

Service Procedures

WARNING

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

20. ACCESS PANEL/CONTROL BOX

a. Remove four screws holding access panel to

cabinet. Refer to Figure 1.

b. Lift access panel off top edge of front panel and

pull panel forward. Refer to Figure 1.

c. Remove control box cover. Refer to Figure 2.

21. LOADING DOOR ASSEMBLY

Refer to Figure 3. a. Open loading door. b. While supporting door, remove upper and

lower hinge pins holding door to hinge brackets.

c. Remove door from hinge brackets.

NOTE: Nylon washer must be in place above lower hinge bracket when reinstalling loading door.

ACCESS PANEL

ATTACHING

SCREWS

22. LOADING DOOR HINGE BRACKETS

Refer to Figure 3. a. Open loading door. b. While supporting door, remove upper and

lower hinge pins holding door to hinge brackets.

c. Remove door from hinge brackets.

d. Remove screws holding brackets to front panel.

NOTE: If both the upper and lower door hinge brackets are removed at the same time, the door switch bracket will fall inside the tumbler. The front panel will have to be removed to retrieve the door switch bracket. In order to avoid this problem, change door hinge brackets one at a time.

ACCESS

PANEL

THERMOSTAT

PANEL

TMB1498S

Figure 1

M412982 23

TIMER BOX

COVER

TIMER PANEL

+ 50 hidden pages

Alliance Laundry Systems AT120FG, SC120FG, DT120FG, JT120FG, ST120FG Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of Contents

Locating An Authorized Service Person

Model Identification

Customer Service

Serial Plate Location

Safety Warnings and Decals

Safety Precautions for Servicing Tumblers

16. TUMBLER WILL NOT START, TIME ON DRYING TIMER, DOOR CLOSED

17. MOTOR RUNS BUT WILL NOT HEAT

18. CYLINDER TURNS, BUT WILL NOT HEAT

19. GROUNDING INSTRUCTIONS

20. ACCESS PANEL/CONTROL BOX

21. LOADING DOOR ASSEMBLY

22. LOADING DOOR HINGE BRACKETS