ALLIANCE GU050N, HA050L, HA050N, HT050L, HT050N Service Manual

...

Drying Tumblers

50 Pound Capacity

Refer to Page 5 for Model Numbers

Service

www.comlaundry.com

TMB795C

Part No. 70269301

January 2003

Section 1 –Safety Information

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

Section 2 –Introduction

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

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

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

Wiring Diagram .......................................................6

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

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

How A Tumbler Works ...........................................8

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. Heating Element Does Not Heat or Burner

Does Not Ignite................................................11

6. Igniter Does Not Shut Off After Gas Ignition —

Gas Burner .......................................................13

7. Heating Element or Burner Shuts off

Prematurely......................................................13

8. Heating Element or Burner Repeatedly Cycles

Off On High Limit Thermostat........................14

9. Heating Element or Burner Does Not Shut-off 14

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

11. Tumbler Overheating.......................................15

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..............................................16

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

16. Troubleshooting Electronic Control Models ...17

17. Tumbler Will Not Start, Time on

Drying Timer, Door Closed .............................18

18. Motor Runs, Time on Drying Timer

But No Heat .....................................................19

19. No Main Burner Flame, Igniter Does

Not Spark .........................................................20

20. Steam OM Models: No Heat with cycle selected,

unit running and calling for heat......................21

21. OM and RM Models: No Start with cycle selected, start button pressed and door closed .22

22. OM Models: No Display after selecting one of

the ON/SELECT keys......................................23

23. Electric OM Models: No Heat with cycle

selected, unit running and calling for heat.......24

24. Gas OM Models: No Heat with cycle selected,

unit running and calling for heat......................25

25. OM Models: No fan motor rotation with cycle

selected and start pressed.................................26

26. OM Reversing Models: No cylinder rotation or

reversing capabilities .......................................27

27. CD Models: No start with vend satisfied and start

button pressed in ..............................................28

28. CD Models: No Heat with vend satisfied and unit

running.............................................................29

29. CD Models: No start with vend satisfied and start

button pushed...................................................30

Section 4 –Grounding

Grounding Instructions ..........................................31

Section 5 –Service Procedures

30. Controls ...........................................................33

31. Push-to-Start Switch........................................33

32. Cooling, Drying, or Run Light ........................33

33. Coin Meter.......................................................34

34. Coin Meter Timer Motor .................................34

35. Coin Meter Run or Heat Switch ......................34

36. Igniter...............................................................36

37. Ignition Control ...............................................36

38. Gas Valve.........................................................36

39. Burner Tube.....................................................36

40. Contactors and Terminal Block.......................38

41. Heater Element ................................................38

42. Stove High Limit Thermostat..........................40

43. Cabinet High Limit Thermostat.......................41

44. High Limit Thermostat ....................................42

45. Thermistor .......................................................42

46. Steam Coils......................................................42

47. Loading Door Assembly..................................43

48. Door Hinge ......................................................43

49. Loading Door Handle ......................................43

50. Front Panel.......................................................44

51. Airflow Switch ................................................45

52. Drive Guard .....................................................45

53. Drive Belt ........................................................45

(continued)

the expressed written consent of the publisher.

70269301 1

54. Drive Belt.........................................................46

55. Idler Shaft ........................................................47

56. Trunnion Housing Assembly...........................48

57. Trunnion Shaft Assembly................................49

58. Motor and Fan Assembly.................................50

59. Fan And Motor Assembly ...............................52

60. Cylinder Drive Motor ......................................53

Section 6 –Adjustments

61. Leveling Legs ..................................................55

62. Main Gas Burner Air Inlet Shutters.................56

63. Airflow Switch.................................................57

64. Loading Door Strike ........................................59

65. Drive Belt Tension...........................................59

66. Cylinder Clearance ..........................................62

2 70269301

Section 1

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.

DANGER

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

WARNING

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

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 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

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 (“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.

70269301 3

Section 1 Safety Information

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.

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

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.

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.

W008

4 70269301

Section 2

Introduction

Model Identification

Information in this manual is applicable to these models†:

Gas Steam Electric

AT050L AT050N GT050L GU050L GU050N HA050L HA050N HT050L HT050N HU050L HU050N LT050L LT050N LU050L LU050N

PA050L PA050N PT050L PT050N PU050L PU050N SA050L SA050N ST050L ST050N SU050L SU050N UA050L UA050N UT050L UT050N UU050L UU050N

AT050S GU050S HT050S HU050S PT050S

PU050S ST050S SU050S UT050S UU050S

GT050E GU050E HT050E HU050E LU050E PT050E

PU050E ST050E SU050E UT050E UU050E

†Includes models with control suffixes:

BC - basic electronic, coin MT - manual timer RM - reversing OPL micro BL - basic electronic, central pay NC - NetMaster coin RT - reversing manual timer BX - basic electronic, prep for coin NR - NetMaster card ZC - NetMaster coin network ready BY - basic electronic, prep for card NX - NetMaster prep for coin ZR - NetMaster card network ready CD - rotary coin drop NY - NetMaster prep for card ZX - NetMaster prep for coin network ready CX - prep for coin drop OM - OPL micro ZY - NetMaster prep for card network ready CY - prep for card

70269301 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 found on serial plate on the rear of machine and inside door.

Wiring Diagram

The wiring diagram is located in the contactor box.

SERIAL

PLATE

TMB803N

6 70269301

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 Parts Manual for ordering replacement decals.

Safety Precautions for Servicing Tumblers

Prior to servicing tumbler:

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

Section 2 Introduction

• Shut off supply gas valve.

• Allow machine to cool prior to servicing.

After servicing tumbler:

• Control/access panels must be reinstalled.

• Motor/drive/belt guards must be reinstalled.

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

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

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

70269301 7

Section 2 Introduction

How A Tumbler Works

Fresh Air Combustion Air Mixed Air Exhaust Air

TMB1748S

The tumbler uses heat, air and movement to dry loads of laundry. When the motor is started, the exhaust fan pulls fresh air in through the air intake and over the heat source (burner

flame for gas, heating element for electric, and coil for steam). The heated air moves into the cylinder, where it is circulated through the laundry by the tumbling action of the

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

8 70269301

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 or fuses blown. • Check power and fuses. Replace fuses if necessary. Loading door not closed or inoperative door switch. • Close door, or test switch and replace if inoperative. Lint door not closed or inoperative lint door switch. • Close lint door, confirm switch is positioned to actuate

with door closed.

Trunnion shaft assembly binding in trunnion housing bearings.

Start circuit not completed. • Press start switch, or test switch and replace if

Idler shaft binding in idler housing bearings. • Replace bearings. Inoperative motor. • Have motor tested and replace if inoperative. Non-Metered Models: Timer improperly set. • Turn drying timer clockwise to desired setting. Non-Metered Models: Inoperative timer or relay. • Test timer and relay and replace if inoperative. Metered Models: Improper coins inserted in

accumulator. Metered Models (CD models): Accumulator knob

improperly set after coins were inserted. Metered Models (CD models): Inoperative run

switch (accumulator). Broken, loose, or incorrect wiring. • Refer to wiring diagram located inside contactor box.

• Replace trunnion housing bearings.

inoperative.

• Check that proper coins are inserted.

• Turn knob clockwise to its full limit of travel.

• Test run switch and replace if inoperative.

W002

70269301 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 the Installation Manual for electrical

requirements.

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

for cylinder adjustment.

Inadequate wiring. • Check with an electrician to ensure that wiring is

adequate.

Inadequate make-up air. • Refer to Installation Manual for make-up air

requirements. Poor maintenance. • Clean lint accumulation on and around the motor. Broken, loose, or incorrect wiring. • Refer to wiring diagram located inside contactor box.

W002

3. MOTOR RUNS BUT CYLINDER DOES NOT TURN.

POSSIBLE CAUSE TO CORRECT

Motor drive pulley loose. • Confirm key is in place, tighten setscrews. Sheave loose. • Confirm key is in place, tighten setscrews and bushing. Broken or loose belt. • Replace or adjust belt. Cylinder is binding. • Check cylinder for binding. Refer to Adjustment Section

for proper cylinder adjustment. Cylinder turn counterclockwise when viewed from

• Switch power leads L1 and L2 to correct rotation.

front of machine. (3 Phase models only)

4. MOTOR DOES NOT STOP

POSSIBLE CAUSE TO CORRECT

Inoperative door switch. • Test switch and replace if inoperative. Non-Metered Models: Inoperative timer or relay. • Test timer and relay and replace if inoperative. Metered Models: Inoperative accumulator. • Test accumulator and replace if inoperative. Incorrect wiring. • Refer to wiring diagram located inside contactor box. Inoperative motor relay or motor contactor. • Check relay/contactor and replace if inoperative.

10 70269301

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. HEATING ELEMENT DOES NOT HEAT OR BURNER DOES NOT IGNITE

POSSIBLE CAUSE TO CORRECT

Improper or inadequate exhaust or make-up air system.

Blown fuses or tripped circuit breakers. • Check fuses or circuit breakers. Drying timer not selected or inoperative. • Set drying timer or replace if necessary. “No Heat” selected on control. • Select temperature option. Inoperative control relay. • Test relay and replace if inoperative. Inoperative thermistor. • Test thermistor by removing harness from thermistor

Electric Models:

Inoperative heating elements or contactors.

Gas Models:

Insufficient gas supply.

Gas Models:

Incorrect orifices.

Gas Models:

Inoperative gas valve coils. Gas Models: Inoperative igniter. • Test igniter and replace if inoperative. Gas Models: Inoperative igniter control. • Test igniter control and replace if inoperative.

• Refer to the Installation Manual for exhaust and make-

up air requirements.

terminals. Check resistance across terminals, should read approximately 50,000 Ohms at 77°F. Resistance should decrease with a temperature increase. Replace thermistor if inoperative.

• Check heat contactors and elements. Replace if necessary.

• Open partially closed gas shut-off valve, or correct low gas pressure. Check inlet pressure and compare to pressure specified on serial plate. If pressure cannot be obtained, contact gas supplier.

• Tumbler is equipped for type of gas specified on serial plate at 0-2,000 feet altitude. Refer to Installation Manual.

• Test coils and replace if available as a service part, otherwise replace valve.

W002

(continued on next page)

70269301 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.

5. HEATING ELEMENT DOES NOT HEAT OR BURNER DOES NOT IGNITE (continued)

POSSIBLE CAUSE TO CORRECT

Gas and Electric Models:

Inoperative high limit thermostat.

Gas and Electric Models:

Inoperative airflow switch.

Gas and Electric Models:

Airflow switch out of adjustment.

Lint door panel not closed properly. • Open lint door panel. Place lint door panel back on

Broken, loose, or incorrect wiring. • Refer to wiring diagram located inside contactor box.

• Test thermostat and replace if inoperative.

• Clean lint compartment after every eight hour shift.

• Check back draft damper for foreign objects, lint accumulation, or other causes that may prevent damper from opening.

• Check ductwork for lint build-up. Refer to Installation Manual to ensure that ductwork and make-up air openings are sized properly.

• Check exhaust outlet. If a screen has been installed on the outlet, it may be clogged with lint or frozen over in winter. NEVER install a screen over the exhaust outlet.

•Refer to Adjustment Section for airflow switch adjustment.

tumbler ensuring a tight fit.

W002

12 70269301

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. IGNITER DOES NOT SHUT OFF AFTER GAS IGNITION — GAS BURNER

POSSIBLE CAUSE TO CORRECT

Tumbler not properly equipped for type of gas being used.

• Tumbler is equipped for type of gas specified on serial

plate at 0-2,000 feet altitude. Refer to Installation Manual.

Insufficient gas supply. • Open partially closed gas shut-off valve, or correct low

gas pressure.

Improperly adjusted burner flame. • Refer to Adjustment Section for recommended burner

flame adjustment. Electrode assembly incorrectly installed. • Check assembly for correct alignment. Inoperative igniter control. • Test igniter control and replace if inoperative. Incorrect wiring. • Refer to wiring diagram located inside contactor box.

W002

7. HEATING ELEMENT OR BURNER SHUTS OFF PREMATURELY

POSSIBLE CAUSE TO CORRECT

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

Gas Models:

Insufficient gas supply.

Gas Models:

Tumbler not properly equipped for type of gas used.

Gas Models:

•Refer to Installation Manual for exhaust and make-up air

requirements.

• Open partially closed gas shut-off valve, or correct low pressure.

• Tumbler is equipped for type of gas specified on serial plate at 0-2,000 feet altitude. Refer to Installation Manual.

•Refer to Adjustment Section for burner flame adjustment.

Improperly adjusted burner flame. Cycling off on high limit thermostat. • Refer to Paragraph 8. Broken, loose or incorrect wiring. • Refer to wiring diagram located inside contactor box.

70269301 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.

8. HEATING ELEMENT OR BURNER REPEATEDLY CYCLES OFF ON HIGH LIMIT THERMOSTAT

POSSIBLE CAUSE TO CORRECT

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

Clogged lint screen. • Remove screen and clean. Lint screen and compartment

Lint in tumbler ducts. • Clean tumbler ducts. Lint in external exhaust system. • Disassemble exhaust system and clean. High limit thermostat cycling at too low a

temperature. Lint door panel not closed properly. • Open lint door panel, place lint door panel back on

Backdraft damper not operating. • Check for foreign objects, lint accumulation or other

•Refer to Installation Manual for exhaust and make-up air

requirements.

should be cleaned after every eight hour shift.

• Replace thermostat.

tumbler ensuring a tight fit.

possible obstructions.

W002

9. HEATING ELEMENT OR BURNER DOES NOT SHUT-OFF

POSSIBLE CAUSE TO CORRECT

Gas Models:

• Replace gas valve. Impurities on gas valve seat, preventing valve from closing.

Inoperative drying timer, relay or contactor. • Replace timer, relay or contactor. Incorrect wiring. • Refer to wiring diagram located inside contactor box.

10. CLOTHES DO NOT DRY

POSSIBLE CAUSE TO CORRECT

Heat source inoperative. • Refer to Paragraph 5. Too much water in articles being dried. • Remove excess water. Clothes load too large. • Remove part of load. Improper or inadequate exhaust system. • Refer to Installation Manual for exhaust requirements. Heat source shuts-off prematurely. • Refer to Paragraph 7. Drying timer improperly set. • Set selector for higher setting. Incorrect voltage. • Refer to Installation Manual for electrical requirements. Inadequate make-up air. • Refer to Installation Manual for make-up air

requirements.

14 70269301

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.

11. TUMBLER OVERHEATING

POSSIBLE CAUSE TO CORRECT

Gas Models:

Incorrect main burner orifices.

Gas Models:

• Replace orifices. Refer to the Installation Manual for

burner orifice requirements.

• Gas pressure must be as specified on serial plate.

Gas pressure too high.

Inadequate make-up air. • Refer to Installation Manual 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 for exhaust

system requirements. Inoperative thermistor. • Test thermistor by removing harness from thermistor

terminals. Check resistance across terminals, should read

approximately 50,000 Ohms at 77°F. Resistance should

decrease with a temperature increase. Replace thermistor

if inoperative. Inoperative cabinet limit or burner limit thermostat. • Check thermostats with Ohm meter and replace if open.

W002

12. BURNERS NOT BURNING PROPERLY — GAS MODELS

POSSIBLE CAUSE TO CORRECT

Burner air shutters incorrectly adjusted. • Refer to Adjustment Section for proper flame adjustment. Dirt in burners. • Disassemble burners and blow out the dirt. Gas pressure too high or too low. • Check serial plate on back of the tumbler for correct gas

pressure. Incorrect orifices. • Tumbler is equipped for type of gas specified on serial

plate at 0-2,000 feet altitude. Refer to Installation

Manual. Make-up air inadequate or pressured. • Refer to Installation Manual for proper make-up air

requirements. Restricted or blocked exhaust duct. • Disassemble and clean exhaust system.

13. LOADING DOOR OPENS DURING OPERATION

POSSIBLE CAUSE TO CORRECT

Door strike improperly adjusted. • Refer to Adjustment Section for door strike adjustment. Tumbler improperly leveled. • Refer to Adjustment Section for leveling leg adjustment.

70269301 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.

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

POSSIBLE CAUSE TO CORRECT

Valves 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. Inoperative timer or thermistor. • Test timer. Test thermistor by removing harness from

thermistor terminals. Check resistance across terminals,

should read approximately 50,000 Ohms at 77°F.

Resistance should decrease with a temperature increase.

Replace either if inoperative.

W002

15. WATER IN STEAM LINE — STEAM MODELS

POSSIBLE CAUSE TO CORRECT

Incorrect installation of steam piping. • Refer to Installation Manual 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.

16 70269301

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. TROUBLESHOOTING ELECTRONIC CONTROL MODELS

PROBLEM POSSIBLE CAUSE TO CORRECT

Door Open light and display flash with door closed

Display shows “SH” and signals sounds

Display shows “OP” and signal sounds three minutes after tumbler is started

Door switch faulty. Replace door switch. Lint panel switch faulty. Replace lint panel switch. Electrical service connected

incorrectly.

Check service connections to terminal block in junction box. For 120 or 240 Volt tumblers, neutral wire must be connected to terminal marked “NEUT”. On single phase tumblers, hot wire must be connected to terminal marked “L1”. A ground wire must be secured to the ground screw in the junction box.

Temperature at sensor is over 191°F (88.3°C).

Allow tumbler to cool and press ON/SELECT

pad. If display still shows “SH”, replace sensor. Temperature sensor shorted. Replace temperature sensor. Temperature at sensor is under 24°F

(-4.4°C).

If the temperature of the tumbler is above 24°F

(-4.4°C), replace temperature sensor. Temperature sensor open. Replace temperature sensor.

W002

70269301 17

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

(Manual Timer Models)

W002

CHECK FOR

24 VOLTS

INTO

DOOR

SWITCH

CHECK

ELECTRICAL

SERVICE TO TUMBLER (Transformer/

Fuses)

CHECK FOR

24 VOLTS ON

TERMINAL 5 OF

CONTROL RELAY

REPLACE

RELAY

CHECK FOR

24 VOLTS

OUT OF

DOOR

SWITCH

HAS

DOOR SWITCH

BEEN

ACTUATED?

REPLACE

DOOR

SWITCH

YES YE S YES

PUSH-TO-START

BROKEN WIRE

FROM CONTROL

RELAY TERMINAL 5

YES

NO NO

YES

CHECK FOR

24 VOLTS INTO

SWITCH

CHECK FOR

24 VOLTS

OUT OF

LINT PANEL

SWITCH

HAS

LINT PANEL

SWITCH

BEEN

ACTUATED?

REPLACE

LINT PANEL

SWITCH

NO NO

YES

PUSH-TO-START

SWITCH. CHECK FOR

24 VOLTS OUT

OF PUSH-TO-START

PUSH-TO-START

CHECK FOR

24 VOLTS AT

TERMINAL 3 OF

CONTROL

RELAY

CHECK

LINT PANEL

SWITCH FOR

BROKEN WIRE

OR POOR

CONNECTION

AT HARNESS

PLUG

PRESS

SWITCH

REPLACE

SWITCH

CHECK FOR

YESYES

CHECK FOR

24 VOLTS TO

MOTOR RELAY

BROKEN WIRE

CONNECTION

AT HARNESS PLUG

24 VOLTS

ACROSS COIL

TERMINALS OF

CONTROL RELAY

CHECK FOR

24 VOLTS ON

TERMINAL B

OF DRYING TIMER

REPLACE

TIMER

COIL

CHECK FOR

OR POOR

YES

CHECK FOR LINE VOLTAGE IN AND OUT OF

RELAY

CHECK POWER

SUPPLY TO

TUMBLER AND

WIRES TO RELAY

YES

18 70269301

CHECK MOTOR

CONNECTIONS

PER WIRING

DIAGRAM

CORRECT

WIRING

YES

CHECK FOR

LINE VOLTAGE

AT MOTOR

TERMINALS

CHECK CONNECTIONS AND HARNESS

CONTINUITY

YES

REPLACE

MOTOR

+ 42 hidden pages

ALLIANCE GU050N, HA050L, HA050N, HT050L, HT050N Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of Contents

Safety Information

Introduction

Model Identification

Troubleshooting