Alliance Laundry Systems JCB50CG, JCB50EG, JT37CG, DCB50CG, JT37CGI Service Manual

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Page 1

Drying Tumblers

50 Pound Capacity

Refer to Page 5 for Model Numbers

Service

www.comlaundry.com

T012C

T012c

Part No. M411429R1

July 2002

Page 2

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

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

Section 3 –Troubleshooting

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

2. Motor Overload Protector Cycles Repeatedly.12

3. Motor Runs But Cylinder Does Not Turn. ......12

4. Motor Does Not Stop.......................................12

5. Heating Element Does Not Heat or Burner Does Not Ignite13

6. Pilot Does Not Ignite — Gas Models

(Standing Pilot Ignition) ..................................15

7. Pilot Goes Out — Gas Models

(Standing Pilot Ignition) ..................................15

8. Igniter Does Not Shut Off After Gas Ignition

— Gas Burner (Automatic Pilot Ignition) .......16

9. Igniter Does Not Glow (Gas Supply Sufficient)

— Gas Models (Glow-bar Ignition).................16

10. Igniter Glows, Sensor Opens But No Ignition

— Gas Models .................................................17

11. Igniter Glows, Sensor Opens But No Ignition

— Gas Models .................................................17

12. Burner Ignites and Goes Out Repeatedly

— Gas Models .................................................18

13. Heating Element or Burner Shuts-off

Prematurely......................................................18

14. Heating Element or Burner Repeatedly Cycles

Off On High Limit Thermostat........................19

15. Heating Element or Burner Does Not

Shut-off ............................................................19

16. Clothes Do Not Dry.........................................19

17. Tumbler Overheating.......................................20

18. Burners Not Burning Properly — Gas Models20

19. Cylinder Door Opens During Operation..........20

20. Tumbler Runs But No Steam To Coils

— Steam Models..............................................21

21. Water In Steam Line — Steam Models...........21

22. Tumbler Will Not Start, Time on Drying

Timer, Door Closed .........................................22

23. Motor Runs, Time on Drying Timer

But No Heat .....................................................23

24. No Spark to Pilot Burner.................................24

25. Spark to Pilot Burner — No Pilot Flame.........25

26. Spark To Pilot Burner — Pilot Lights

— No Main Burner..........................................26

27. Igniter Does Not Glow.....................................27

28. Igniter Glows Constantly.................................27

29. Igniter Glows, Cycles Off But Burner

Does Not Ignite................................................27

30. Igniter Does Not Glow.....................................28

31. Igniter Glows Constantly.................................28

32. Igniter Glows, Cycles Off But Burner

Does Not Ignite................................................28

33. Igniter Sparks — No Main Burner Ignition.....29

34. CSH OM Models: No Heat with cycle selected,

unit running and calling for heat......................30

35. OM Models: No Start with cycle selected, start

button pressed and door closed........................31

36. OM Models: No Display after selecting one of

the ON/SELECT keys......................................32

37. CE OM Models: No Heat with cycle selected,

unit running and calling for heat......................33

38. CG OM Models: No Heat with cycle selected,

unit running and calling for heat......................34

39. OM Models: No fan motor rotation with cycle

selected and start pressed.................................36

40. MM Models: Fan Motor Does Not Run with door closed, cycle selected and start button

pressed .............................................................37

41. MM Models: Cylinder motor does not run or reverse with door closed, cycle selected and start button pressed in reversing mode or

nonreversing mode...........................................38

42. MM Models: No Heat with cycle selected, unit

running and calling for heat.............................39

43. MM Models: No Heat with cycle selected, unit

running and calling for heat.............................40

44. OM Reversing Models: No cylinder rotation or

reversing capabilities .......................................41

45. MM Models: No display after pressing the ON/

Select keys .......................................................42

46. MM Models: Motor Does Not Run with door closed, cycle selected and start button

pressed .............................................................42

the expressed written consent of the publisher.

M411429 1

Page 3

47. MM Models: Cylinder motor does not run or reverse with door closed, cycle selected and start button pressed in reversing mode or

nonreversing mode...........................................43

48. MM Nonreversing Models: Motor Does Not Run with door closed, cycle selected and start

button pressed ..................................................44

49. CD Models: No start with vend satisfied and

start button pressed in ......................................45

50. CD Models: No Heat with vend satisfied

and unit running...............................................46

51. CD Models: No Heat with vend satisfied and

unit running......................................................47

52. CD Models: No start with vend satisfied and

start button pushed...........................................48

53. CD Models: No start with vend satisfied and

start button pushed...........................................49

Section 4 –Grounding

Grounding Instructions ..........................................51

Section 5 –Service Procedures

54. Control Panel ...................................................53

55. Push-to-Start Switch........................................53

56. Cooling, Drying, or Run Light ........................53

57. Relay (Manual Timers Models).......................55

58. Resistor ............................................................55

59. Cooling or Drying Timer.................................55

60. Cooling or Drying Timer Motor......................56

61. Coin Meter.......................................................57

62. Coin Meter Timer Motor .................................58

63. Coin Meter Run or Heat Switch ......................58

64. Control Thermostat..........................................59

65. Transformer .....................................................60

66. Gas Valve Assembly........................................62

67. Electronic Package...........................................64

68. Main or Pilot Operator.....................................64

69. Gas Valve.........................................................64

70. Operator ...........................................................64

71. Reset Assembly ...............................................64

72. Gas Valve.........................................................66

73. Magnetic Operators .........................................66

74. Gas Valve.........................................................66

75. Diode Logic Board ..........................................66

76. Main Coil.........................................................67

77. Igniter and Bracket ..........................................67

78. Sensor ..............................................................67

79. Igniter...............................................................67

80. Ignition Control ...............................................67

81. Gas Valve.........................................................67

82. Main Coil.........................................................68

83. Burner Tube.....................................................68

84. Contactors and Terminal Block.......................68

85. Heater Element ................................................69

86. Stove High Limit Thermostat..........................70

87. Cabinet High Limit Thermostat.......................71

88. High Limit Thermostat....................................72

89. Steam Coils......................................................73

90. Loading Door Assembly..................................73

91. Loading Door Hinge........................................74

92. Loading Door Handle......................................74

93. Front Panel.......................................................74

94. Loading Door Switch.......................................76

95. Loading Door Switch Rod...............................76

96. Airflow Switch ................................................77

97. Wire Cover or Wire Channel Cover Plate.......78

98. Drive Guard .....................................................78

99. Drive Belt ........................................................78

100. Drive Chain......................................................79

101. Idler Housing Assembly..................................79

102. Idler Sprocket...................................................80

103. Sheave..............................................................80

104. Drive Sprocket.................................................81

105. Idler Shaft ........................................................81

106. Cylinder Sprocket............................................81

107. Cylinder Assembly ..........................................82

108. Trunnion Housing Assembly...........................83

109. Trunnion Shaft Assembly................................84

110. Motor and Fan Assembly ................................85

111. Fan And Motor Assembly ...............................86

112. Cylinder Drive Motor ......................................88

113. Reversing Control Electrical Components......90

Section 6 –Adjustments

114. Leveling Legs ..................................................93

115. Main Gas Burner Air Inlet Shutters.................94

116. Airflow Switch ................................................95

117. Loading Door Switch.......................................97

118. Cylinder Door Strike .......................................97

119. Drive Belt Tension...........................................98

120. Drive Chain Tension......................................101

121. Cylinder Clearance ........................................103

2 M411429

Page 4

Section 1

Safety Information

Throughout this manual and on machine decals, you will find precautionary statements (“CAUTION”, “WA RN I NG ”, 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 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

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.

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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 M411429

Page 6

Section 2

Introduction

Model Identification

Information in this manual is applicable to these models:

Gas Steam/Thermal Oil Electric

DCB50CG DCB50EG DTB50CG DTB50EG JC50CG JC50EG JCB50CG JCB50EG JT37CG JT37CGI JT37EG JT37EGI JT50CG JT50CGI JT50EG JT50EGI

JTB50CG JTB50EG SC50CG SC50EG SCB50CG SCB50EG ST37CG ST37CGI ST37EG ST37EGI ST50CGI ST50EGI STB50CG STB50EG TKD50CGMT

DCB50CSH DTB50CSH DTB50CSL JC50CSH JCB50CSH JT37CSH JT37CSL JT50CSH JT50CSL JTB50CSH JTB50CSL SC50CSH SCB50CSH ST37CSH ST37CSL ST50CSH ST50CSL STB50CSH STB50CSL

DCB50CE DTB50CE JC50CE JCB50CE JT37CE JT50CE JTB50CE SC50CE SCB50CE ST37CE ST50CE STB50CE TKD50CEMT

M411429 5

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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(s) as shown.

T419IE3B

6 M411429

Page 8

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

• Disconnect electrical service.

• Shut off supply gas valve before servicing gas

components.

• Control panel and access panel MUST be reinstalled after inspection or servicing of tumbler is completed.

Section 2 Introduction

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

• Chain/drive guard MUST be reinstalled after inspection or servicing of tumbler is completed.

• 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.

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Section 2 Introduction

How A Tumbler Works

Fresh Air Combustion Air Mixed Air

T008CE1A

Exhaust Air

Standard Models

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.

NOTE: In Energy Saver Models, some of the exhaust air is recirculated. Refer to page 9.

8 M411429

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Section 2 Introduction

Fresh Air Combustion Air Mixed Air Recirculating Air Exhaust Air

T007CE1A

Energy Saver Models

M411429 9

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

switch adjustment.

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: Accumulator knob improperly

set after coins were inserted. Metered Models: Inoperative run switch

(accumulator). Broken, loose, or incorrect wiring. • Refer to wiring diagram located on back of tumbler or in

• 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.

literature packet.

W002

M411429 11

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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 (supplied with tumbler)

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 (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 setscrews. Sheave loose. • Tighten setscrews. Broken or loose belt. • Replace or adjust belt. Broken or loose drive chain or sprocket. • Replace or adjust chain or sprocket. Cylinder is binding. • Check cylinder for binding. Refer to Adjustment Section

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 for proper switch adjustment. 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 on back of tumbler or in

literature packet.

12 M411429

Page 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.

5. HEATING ELEMENT DOES NOT HEAT OR 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. Blown fuses or tripped circuit breakers. • Check fuses or circuit breakers. Drying timer not selected or inoperative. • Set drying timer or replace if necessary. Inoperative control relay. • Test relay and replace if inoperative. Inoperative thermostat. • Test thermostat and replace if inoperative. Electric Models:

• Check heat contactors and elements. Replace if necessary.

Inoperative heating elements or contactors.

Gas Models:

Insufficient gas supply.

• 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.

Gas Models:

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.

Gas Models: (Standing Pilot Ignition)

Pilot is not lit.

• Refer to Installation Manual (supplied with tumbler) or INSTRUCTION plate on back of tumbler for LIGHTING AND SHUTTING DOWN STANDING PILOT.

Gas Models: (Standing Pilot Ignition)

Inoperative gas valve reset assembly or

• Check and replace thermocouple or reset assembly if necessary.

thermocouple.

Gas Models:

• Test coils and replace if inoperative.

Inoperative gas valve coils.

Gas Models: (Automatic Ignition)

• Test igniter and replace if inoperative.

Inoperative igniter.

Gas Models: (Automatic Ignition)

• Test igniter control and replace if inoperative.

Inoperative igniter control.

W002

(continued on next page)

M411429 13

Page 14

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 Models: (Glow Bar Ignition)

• Test igniter and replace if inoperative.

Inoperative igniter

Gas Models: (Glow Bar Ignition)

• Test sensor and replace if inoperative.

Inoperative sensor.

Gas and Electric Models:

• Test thermostat and replace if inoperative.

Inoperative high limit thermostat.

Gas and Electric Models:

Inoperative airflow switch

• 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 (supplied with tumbler) to ensure that ductwork

and make-up air openings are sized properly.

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

Gas and Electric Models:

Airflow switch out of adjustment.

• Refer to Adjustment Section for airflow switch adjustment.

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

tumbler (ensuring a tight fit) then latch.

Broken, loose, or incorrect wiring. • Refer to wiring diagram located on back of tumbler or in

literature packet.

W002

14 M411429

Page 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.

6. PILOT DOES NOT IGNITE — GAS MODELS (STANDING PILOT IGNITION)

POSSIBLE CAUSE TO CORRECT

Gas shut-off valve to tumbler is closed. • Open valve. Air is present in gas line. • Purge air from gas line. Incorrect pilot orifice. • Tumbler is equipped for type of gas specified on serial

plate. If pilot orifice is different from that specified on serial plate, obtain and install correct orifice.

Clogged pilot gas filter. • Replace reset assembly. Clogged pilot gas tube or pilot orifice. • Clean or replace tube or orifice. Inoperative thermocouple. • Replace thermocouple. Inoperative pilot assembly. • Replace pilot assembly.

W002

7. PILOT GOES OUT — GAS MODELS (STANDING PILOT IGNITION)

POSSIBLE CAUSE TO CORRECT

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

exhaust system requirements.

Clogged lint screen. • Remove and clean lint screen. Improperly adjusted burner flame. • Close air shutter slightly — A harsh roaring flame will

draw pilot flame out.

Carbon accumulation on heated end of pilot

• Wipe carbon off end of thermocouple.

thermocouple. Incorrect pilot orifice. • Tumbler is equipped for type of gas specified on serial

plate. If pilot orifice is different from that specified on serial plate, obtain and install correct orifice.

Inoperative gas valve reset assembly or thermocouple.

• Check and replace reset assembly or thermocouple if necessary.

M411429 15

Page 16

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. IGNITER DOES NOT SHUT OFF AFTER GAS IGNITION — GAS BURNER (AUTOMATIC PILOT IGNITION)

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. If tumbler is equipped for gas different from that specified on serial plate, obtain the necessary components to correct the problem.

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.

Pilot and 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 on back of tumbler or in

literature packet.

W002

9. IGNITER DOES NOT GLOW (GAS SUPPLY SUFFICIENT) — GAS MODELS (GLOW-BAR IGNITION)

POSSIBLE CAUSE TO CORRECT

Sensor failed with contacts open. • Replace sensor. Igniter is broken or open. • Replace glow bar igniter. No circuit for burner operation. • Tumbler is not calling for heat, check the heat circuit to

the ignition system.

16 M411429

Page 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.

10. IGNITER GLOWS, SENSOR OPENS BUT NO IGNITION — GAS MODELS (Johnson Controls System)

POSSIBLE CAUSE TO CORRECT

Insufficient gas supply. • Check gas supply and pressure. Gas flow but no ignition. • Remove igniter and bracket and bend “L” shaped bracket

(located on left side of stove) up or down. Reinstall igniter and bracket and check for 1/8 – 1/4 inch gap between bottom of igniter and top of main burner.

No gas flow through gas valve. • Check primary valve coil and plunger. Replace coil if

inoperative, or check for 120 Volts to control relay (PR1) coil contacts (A) and 120 Volts to control relay (PR1) contact number 7. If no voltage replace control relay (PR1) or check secondary valve coil and plunger operation replace coil if inoperative.

W002

NOTE: To check the primary and secondary valve coil and plunger operation, place fingers on top of coils, cycle the machine and restart ignition circuit, you should feel the primary valve coil plunger open first, followed by glow bar heat up, followed by the sensor opening, and the secondary valve coil plunger opening. If plungers do not open, electrically check the coils. Check gas pressure to tumbler. Line pressure should be 7 ± 1/2 inches (Natural Gas) or 11 inches (L.P. Gas) water column pressure. Manifold pressure should be 3.5 inches (Natural Gas) or 11 inches (L.P. Gas) water column pressure.

11. IGNITER GLOWS, SENSOR OPENS BUT NO IGNITION — GAS MODELS (White Rodgers Glow-bar Ignition)

POSSIBLE CAUSE TO CORRECT

Insufficient gas supply. • Is manual shut-off valve in full open position? Check gas

pressure. Gas flow but no ignition. • Gap between igniter and burner must be 1/8 to 1/4 inch. No gas flow through gas valve. • Check for 80 – 120 Volts between red and white wire on

gas valve.

• If correct voltage is present and redundant coil does not click open, replace complete gas valve.

• If correct voltage is not present, replace diode logic board.

• If correct voltage is present and redundant coil clicks

open, check for 40 – 60 Volts across the purple wires on the main coil after the igniter cycles off.

• If voltage is present and main coil does not stay open, replace main coil.

• If no voltage is present, replace diode logic board.

M411429 17

Page 18

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. BURNER IGNITES AND GOES OUT REPEATEDLY — GAS MODELS (Glow-Bar Ignition)

POSSIBLE CAUSE TO CORRECT

Burner heat not holding sensor contacts open. • Replace sensor. Insufficient gas pressure. • Check gas supply and pressure. A low flame will not

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

air. Cycles on high limit thermostat. • Refer to Paragraph 14. 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

13. 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 (supplied with tumbler) 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. If orifices are different from that specified on serial plate, obtain and install proper orifices.

• Refer to Adjustment Section for burner flame adjustment.

Improperly adjusted burner flame.

Gas Models: (Glow-Bar Ignition)

• Replace sensor.

Sensor contact closing. Cycling off on high limit thermostat. • Refer to Paragraph 14. Broken, loose or incorrect wiring. • Refer to wiring diagram located on back of tumbler or in

literature packet.

18 M411429

Page 19

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. 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.

• 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 tumbler ducts. • Clean tumbler ducts. 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. • Open lint door panel — place lint door panel back on

tumbler (ensuring a tight fit) then latch.

W002

15. 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 on back of tumbler or in

literature packet.

16. 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 (supplied with tumbler) for

exhaust requirements. Heat source shuts-off prematurely. • Refer to Paragraph 13. 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.

M411429 19

Page 20

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 OVERHEATING

POSSIBLE CAUSE TO CORRECT

Gas Models:

• Replace orifices.

Incorrect main burner orifices.

Gas Models:

• Gas pressure must be as specified on serial plate.

Gas pressure too high.

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.

W002

18. 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. • 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. 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.

19. CYLINDER 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.

20 M411429

Page 21

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.

20. 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 thermostat • Test timer or thermostat. Replace if inoperative.

W002

21. 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.

M411429 21

Page 22

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.

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

MANUAL TIMER MODELS

W002

CHECK FOR

LINE VOLTAGE

INTO DOOR SWITCH

CHECK

ELECTRICAL SERVICE

TO TUMBLER

(Fuses/Circuit Breaker)

CHECK FOR

LINE VOLTAGE ON

TERMINAL 1 OF

CONTROL RELAY

CHECK FOR

LINE VOLTAGE

OUT OF

DOOR SWITCH

NO NO

HAS SWITCH ROD

MECHANICALLY

ACTUATED

DOOR SWITCH?

ADJUST

DOOR SWITCH

ROD

YES YES YES

CHECK FOR

LINE VOLTAGE INTO

PUSH-TO-START

SWITCH

NO NO

YES

REPLACE

DOOR

SWITCH

CHECK FOR

LINE VOLTAGE AT

TERMINAL 3 OF

CONTROL RELAY

CHECK FOR

BROKEN

WIRE

OR POOR

CONNECTION

HARNESS

PLUG

PRESS

PUSH-TO-START

SWITCH. CHECK FOR

LINE VOLTAGE OUT

OF PUSH-TO-START

SWITCH

YESYES

CHECK FOR

LINE VOLTAGE ACROSS

COIL TERMINALS

OF CONTROL RELAY

CHECK FOR

LINE VOLTAGE ON

TERMINAL B

OF DRYING TIMER

REPLACE

TIMER

CHECK FOR

LINE VOLTAGE

TO MO T O R

YES

REPLACE

MOTOR

YES

REPLACE

RELAY

22 M411429

CHECK FOR

BROKEN WIRE

FROM CONTROL

RELAY TERMINAL 1

REPLACE

PUSH-TO-START

SWITCH

CHECK FOR

BROKEN WIRE

OR POOR

CONNECTION

AT HARNESS PLUG

Page 23

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.

23. MOTOR RUNS, TIME ON DRYING TIMER BUT NO HEAT

W002

POWER OUT OF MAIN CONTROL

THERMOSTAT

YES

CHECK THE

IGNITION

CIRCUIT

CHECK FOR

BROKEN OR LOOSE WIRE AT HARNESS PLUG

YES NO NO NO NO

REPAIR

WIRE

NO YES YES YES YES

POWER INTO

MAIN CONTROL

THERMOSTAT

YES

REPLACE

MAIN CONTROL

THERMOSTAT

POWER ON

RED WIRE

FROM MOTOR

REPLACE

MOTOR

BROKEN WIRE

POWER ON

TERMINAL 6 OF

CONTROL RELAY

LOOSE OR

BROKEN WIRE TO

MAIN CONTROL

THERMOSTAT

POWER INTO

AIRFLOW

SWITCH

CHECK FOR

LOOSE OR

FROM MOTOR

YES YE S

POWER OUT OF

AIRFLOW

SWITCH

AIRFLOW

SWITCH

CLOSED

POWER ON

TERMINAL 4 OF

CONTROL RELAY

POWER ACROSS

COIL TERMINALS OF

CONTROL RELAY

YES

REPLACE

CONTROL RELAY

POWER INTO

CABINET

HIGH LIMIT

THERMOSTAT

CHECK FOR

BROKEN WIRE

FROM

AIRFLOW SWITCH

ADJUST

AIRFLOW

SWITCH

POWER OUT OF

CABINET

HIGH LIMIT

THERMOSTAT

NO NO NO

REPLACE

THERMOSTAT

M411429 23

POWER INTO

BURNER

HIGH LIMIT

THERMOSTAT

CHECK FOR

BROKEN WIRE

FROM CABINET

HIGH LIMIT

YES YESYES

POWER OUT OF

BURNER

HIGH LIMIT

THERMOSTAT

REPLACE

BURNER

HIGH LIMIT

THERMOSTAT

YES

REPLACE AIRFLOW

SWITCH

CHECK FOR LOOSE

OR BURNED

CONNECTION

AT HARNESS PLUG

Page 24

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.

24. NO SPARK TO PILOT BURNER (Electronic Pilot Ignition Models Only)

SHIFT LEFT

BURNER FURTHER

TO LEFT

YES

W002

24 VOLTS BETWEEN

TERMINAL 2 AND

GROUND ON

ELECTRONIC

PACKAGE

CHECK TUMBLER

HEAT CIRCUIT

CERAMIC INSULATOR

SECURELY BONDED

TO PILOT BURNER

ASSEMBLY

(Cannot Swivel)

YES

HIGH TENSION

CABLE SECURELY

ATTACHED TO IGNITOR POST

CORRECT

REPLACE PILOT

AND ELECTRODE

ASSEMBLY

YES

ARCING TO LEFT

BURNER

CRACKS IN

CERAMIC INSULATOR

ENCASING IGNITOR

PROBE

YES

REPLACE

PILOT AND

ELECTRODE

ASSEMBLY

YES

7/64 INCH GAP

BETWEEN

ELECTRODE AND

LEFT DIVERTER OF

PILOT BURNER

24 M411429

REPLACE

ELECTRONIC

PACKAGE

REPLACE PILOT

AND ELECTRODE

ASSEMBLY

Page 25

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.

25. SPARK TO PILOT BURNER — NO PILOT FLAME (Electronic Pilot Ignition Models Only)

W002

24 VOLTS BETWEEN

TERMINAL 1 AND

GROUND ON

ELECTRONIC

PACKAGE

REPLACE

ELECTRONIC

PACKAGE

YES

GAS PRESENT AT

PILOT BURNER

(Disconnect white wire

from Terminal 3 and

light manually)

REMOVE BLACK WIRE

FROM TERMINAL 1.

MOMENTARILY TOUCH TO

TERMINAL 2; IS “CLICK”

HEARD?

REPLACE RIGHT COIL

(PILOT OPERATOR)

YES

M411429 25

REFER TO

“NO SPARK TO

PILOT BURNER”

PILOT FILTER,

TUBE OR

ORIFICE

OBSTRUCTED

YES

CLEAR

OBSTRUCTION

Page 26

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.

26. SPARK TO PILOT BURNER — PILOT LIGHTS — NO MAIN BURNER (Electronic Pilot Ignition Models Only)

24 VOLTS BETWEEN

TERMINAL 3 AND

GROUND ON

ELECTRONIC

PACKAGE

YES

REPLACE LEFT COIL

(Main Operator)

W002

WIRE BETWEEN

SENSOR AND

TERMINAL 4 OF

ELECTRONIC

PACKAGE

CONNECTED

SECURELY

CORRECT

YES

SENSOR SECURELY

SEATED IN

PILOT BURNER

CORRECT

REPLACE

SENSOR

YES

CRACK IN

SENSOR

CERAMIC

INSULATOR

YES

CHECK GAS

PRESSURE

YES

26 M411429

PILOT FILTER,

TUBE OR

ORIFICE

OBSTRUCTED

YES

CLEAR PILOT ORIFICE

OR USE LARGER

PILOT ORIFICE

Page 27

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.

27. IGNITER DOES NOT GLOW (Johnson Controls Glow-Bar System)

W002

120 VOLTS PRESENT

BETWEEN BLACK

WIRE AND GROUND

ON MAIN

THERMOSTAT?

CHECK

HEAT CIRCUIT

YES

120 VOLTS PRESENT

BETWEEN RED AND

WHITE WIRES OF

IGNITER BRACKET?

REPLACE

IGNITER

YES

28. IGNITER GLOWS CONSTANTLY (Johnson Controls Glow-Bar System)

REPLACE

SENSOR

29. IGNITER GLOWS, CYCLES OFF BUT BURNER DOES NOT IGNITE (Johnson Controls Glow-Bar System)

120 VOLTS PRESENT

ACROSS THE TWO

WIRES OF THE

PRIMARY COIL?

CAN YOU FEEL OR

YES YES YES

HEAR THE PRIMARY

COIL OPEN?

120 VOLTS PRESENT

ACROSS THE TWO

WIRES TO THE

SECONDARY COIL?

120 VOLTS PRESENT

BETWEEN EACH OF THE

PURPLE WIRES OF

SENSOR AND GROUND?

REPLACE

SENSOR

REPLACE

SECONDARY COIL

CHECK FOR A

BROKEN WIRE

BETWEEN THE

TERMINAL BLOCK

AND PRIMARY COIL.

M411429 27

PRIMARY COIL.

REPLACE

120 VOLTS PRESENT

ON TERMINALS A

AND 7 OF IGNITION

RELAY?

REPLACE

RELAY

YES

GAP BETWEEN

IGNITER AND BURNER

1/8 – 1/4 INCH?

ADJUST

IGNITER GAP TO

1/8 – 1/4 INCH

Page 28

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.

30. IGNITER DOES NOT GLOW (White Rodgers Glow-Bar System)

W002

80 - 120 VOLTS

PRESENT BETWEEN

BLACK WIRE AND

GROUND ON MAIN

THERMOSTAT?

CHECK

HEAT CIRCUIT

YES

80 - 120 VOLTS

PRESENT BETWEEN

RED AND WHITE

WIRES OF IGNITER

BRACKET?

YES

REPLACE

IGNITER

31. IGNITER GLOWS CONSTANTLY (White Rodgers Glow-Bar System)

REPLACE

SENSOR

32. IGNITER GLOWS, CYCLES OFF BUT BURNER DOES NOT IGNITE (White Rodgers Glow-Bar System)

80 - 120 VOLTS

PRESENT BETWEEN

EACH OF THE PURPLE

WIRES OF SENSOR AND

GROUND?

REPLACE

DIODE LOGIC

BOARD

80 - 120 VOLTS

PRESENT ACROSS

THE RED AND WHITE

WIRES OF THE

REDUNDANT COIL?

REPLACE DIODE

LOGIC BOARD

YES YES YES

28 M411429

CAN YOU

HEAR THE

REDUNDANT

COIL

OPEN?

REPLACE

COMPLETE

GAS VALVE

40 - 60 VOLTS

PRESENT ACROSS

THE PURPLE WIRES

TO THE

MAIN COIL?

REPLACE DIODE

LOGIC BOARD

CAN YOU HEAR THE MAIN COIL

CLICK

OPEN?

REPLACE MAIN COIL

YES

GAP BETWEEN

IGNITER

AND BURNER

1/8 – 1/4 INCH?

ADJUST

IGNITER GAP TO

1/8 – 1/4 INCH

Page 29

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.

33. IGNITER SPARKS — NO MAIN BURNER IGNITION (Instant Electronic Ignition)

W002

IGNITER

SPARKING

YES

GREEN WIRE

FROM

IEI CONTROL

CONNECTED TO

GROUND

TERMINAL

YES

GAS SHUT-OFF

VALVE

TURNED ON?

IEI CONTROL IN

SAFETY LOCKOUT

RESET BY OPENING

AND CLOSING DOOR

OPEN AND

CLOSE DOOR

NO OPEN GAS

YES

CONNECT

GREEN WIRE TO

GROUND TERMINAL

SHUT-OFF VALVE

RESISTANCE OF

HIGH VOLTAGE LEAD

GREATER THAN 25,0000

OHMS OR LESS THAN

5,000 OHMS

YES YES

REPLACE

HIGH VOLTAGE

LEAD

IGNITER GAP IS

NOT 5/32 INCH

(.397 CM)

OR CERAMIC

CRACKED

RE-GAP OR

REPLACE

IGNITER

REPLACE

IEI

CONTROL

YES

120 VOLTS PRESENT ON BLACK WIRE

FROM IEI

CONTROL

YES

CHECK GAS

VALVE COILS

REPLACE

AS REQUIRED

M411429 29

REPLACE

IEI

CONTROL

Page 30

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.

34. CSH OM MODELS: NO HEAT WITH CYCLE SELECTED, UNIT RUNNING AND CALLING FOR HEAT 120 Volt/60 Hertz/1 Phase and 208-240 Volt/60 Hertz/1 Phase Nonreversing 460-480 Volt/60 Hertz/3 Phase and 208-240 Volt/60 Hertz/3 Phase Reversing and Nonreversing

Step Problem If No, then

1 Is there voltage at H2-13? If yes, continue to next step. Replace micro control. 2 Is there voltage at H2-6? If yes, continue to next step. Correct wiring between H2-6 and H2-13. 3 Is there voltage at H2-5? If yes, continue to next step. Check for proper thermistor operation. Replace micro

control if necessary.

4 Is there voltage to the input of the motor relay? If yes,

continue to next step.

5 Is there voltage to the output of the motor relay? If yes,

continue to next step for 1 phase units, Step 11 for 3 phase units.

6 1 Phase Only: Is there voltage to terminal 3 of CR1? If

yes, continue to next step.

7 Is there voltage to terminal 5 of CR1? If yes, continue

with Step 13.

8 Is there voltage to terminal 3 of the motor? If yes,

continue to next step.

9 Is there voltage across the coil of CR1? If yes, continue to

next step. 10 Does CR1 operate? If yes, continue to Step 13. Replace CR1. 11 3 Phase Only: Is there voltage to the input of the motor

switch? If yes, continue to next step. 12 Is there voltage to the output of the motor switch? If yes,

continue to next step. 13 Is there voltage across the steam valve coil? If yes,

continue to next step. 14 Unit operational. If unit still doesn’t heat, check steam

supply.

Correct wiring between motor relay and micro control.

Replace motor relay.

Correct wiring between CR1 and motor relay.

Continue with Step 8.

Replace motor.

Correct wiring to CR1.

Correct wiring to motor switch.

Replace motor.

Correct wiring to steam valve coil.

W002

30 M411429

Page 31

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.

35. OM MODELS: NO START WITH CYCLE SELECTED, START BUTTON PRESSED AND DOOR CLOSED 120 Volt/60 Hertz/1 Phase CG & CSH Nonreversing 208-240 Volt/60 Hertz/1 or 3 Phase CSH Nonreversing 208-240 Volt/60 Hertz/3 Phase CE Nonreversing 460-480 Volt/60 Hertz/3 Phase CG, CE and CSH Nonreversing

Step Problem If No, then

1 Is there voltage to the primary of the transformer? If yes,

continue to next step.

2 Is there 24 VAC across terminals 2 & 3 of transformer

secondary? If yes, continue to next step.

3 Is there voltage to the COM terminal of the door switch?

If yes, continue to next step.

4 Is there voltage to the N.O. terminal of the door switch? If

yes, continue to next step.

5 Is there voltage to terminal H2-8 on the micro control? If

yes, continue to next step.

6 Is there voltage at terminal H2-7 on the micro control? If

yes, continue to next step.

7 Is there voltage across the coil of motor relay? If yes,

continue to next step.

8 Is there voltage to the input of the motor relay? If yes,

continue to next step.

9 Is there voltage to the output of the motor relay? If yes,

continue to next step.

10 Is there voltage across terminals 1 and 4 of the motor for

single phase units or L1, L2 and L3 of three phase units?

If yes, continue to next step. 11 Does the motor operate? If yes, continue to next step. Replace motor. 12 Unit operational.

Correct wiring to transformer primary. Check fuses.

Replace transformer.

Correct wiring between door switch and transformer. Check fuses.

Check door switch for proper operation. Replace if necessary.

Correct wiring between micro control and door switch.

Replace micro control.

Correct wiring between motor relay and micro control.

Correct wiring between motor relay and supply voltage.

Replace motor relay.

Correct wiring between motor and motor relay.

W002

M411429 31

Page 32

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.

36. OM MODELS: NO DISPLAY AFTER SELECTING ONE OF THE ON/SELECT KEYS 120 Volt/60 Hertz/1 Phase CG & CSH Nonreversing 208-240 Volt/60 Hertz/1 Phase CG and CSH Nonreversing 208-240 Volt/60 Hertz/3 Phase CG and CSH Reversing/Nonreversing 208-240 Volt/60 Hertz/3 Phase CE Reversing/Nonreversing 460-480 Volt/60 Hertz/3 Phase CG, CE and CSH Reversing/Nonreversing

Step Problem If No, then

1 Is there voltage across the primary of the transformer? If

yes, continue to next step.

2 Is there 24 VAC across terminals 1 & 4 of transformers

secondary? If yes, continue to next step.

3 Is there 24 VAC across terminals H3-3 and H3-4 on the

micro control? If yes, continue to next step.

4 Is there voltage to the input of the fuse on the micro

control? If yes, continue to next step

5 Is there voltage to the opposite side of the fuse on the

micro control? If yes, continue to next step.

6 Replace micro control.

Correct wiring between transformer and supply voltage. Check fuses.

Replace transformer

Correct wiring between H3 and transformer. Check fuses.

Replace micro control.

Check fuse making sure it is not blown. Replace if necessary.

W002

32 M411429

Page 33

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.

37. CE OM MODELS: NO HEAT WITH CYCLE SELECTED, UNIT RUNNING AND CALLING FOR HEAT 460-480 Volt/60 Hertz/3 Phase and 208-240 Volt/60 Hertz/3 Phase Reversing and Nonreversing

Step Problem If No, then

1 Is there voltage at H2-13? If yes, continue to next step. Replace Micro. 2 Is there voltage at H2-6? If yes, continue to next step. Correct wiring between H2-6 and H2-13. 3 Is there voltage at H2-5? If yes, continue to next step. Check for proper thermistor operation. Replace micro if

necessary.

4 Is there voltage to terminal 14 of the motor relay? If yes,

continue to next step.

5 Is there voltage to terminal 13 of the motor relay? If yes,

continue to next step for 1 phase units, Step 22 for 3 phase units.

6 Is there voltage to the fan motor switch? If yes, continue

to next step.

7 Is there voltage at the output of the fan motor switch.

If yes, continue to next step.

8 Is there voltage to the input of the cabinet limit? If yes,

continue to next step.

9 Is there voltage to the output of the cabinet limit? If yes,

continue to next step.

10 Is there voltage to the COM terminal of the airflow

switch? If yes, continue to next step.

11 Is there voltage to the N.O. terminal of the airflow switch?

If yes, continue to next step.

12 Is there voltage to the input of the stove limit? If yes,

continue to next step.

13 Is there voltage to the output of the stove limit? If yes,

continue to next step. 14 Is there voltage HC1? Correct wiring to HC1. 15 Is there voltage to terminals T1, T2 and T3 of HC1? If yes,

continue to next step. 16 Is there voltage to terminals L1, L2 and L3 of HC1? Replace HC1. 17 Is there voltage across the elements? If yes, then continue

to next step. 18 Do the elements produce heat? If yes, continue to Step 35.

Correct wiring between motor relay and micro.

Replace motor relay.

Correct wiring between motor switch and motor relay.

Replace fan motor.

Correct wiring between cabinet limit and fan motor.

Check for proper airflow. Replace cabinet limit.

Correct wiring between airflow switch and cabinet limit.

Check for proper airflow. Replace airflow switch.

Correct wiring between stove limit and airflow switch.

Check for proper airflow. Replace stove limit if necessary.

Correct wiring between HC1 and supply.

Correct wiring to the elements.

Check for opens or shorts in the elements.

W002

NOTE: IF elements are glowing a bright red/orange,

there is not enough airflow. 19 Unit operational.

(continued)

M411429 33

Page 34

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.

38. CG OM MODELS: NO HEAT WITH CYCLE SELECTED, UNIT RUNNING AND CALLING FOR HEAT 120 Volt/60 Hertz/1 Phase and 208-240 Volt/60 Hertz/1 Phase Nonreversing 460-480 Volt/60 Hertz/3 Phase and 208-240 Volt/60 Hertz/3 Phase Reversing and Nonreversing

Step Problem If No, then

1 Is there voltage at H2-13? If yes, continue to next step. Replace micro control. 2 I s t he re vo lt ag e a t H2 -6 of the mi cr o c ont ro l?

If yes, continue to next step.

3 I s t he re vo lt ag e a t H2 -5 of the mi cr o c ont ro l?

If yes, continue to next step.

4 Is there voltage to input of the motor relay? If yes,

continue to next step.

5 Is there voltage to the output of the motor relay? If yes,

continue to next step for 1 phase units, or step 11 for 3 phase units.

6 1 Phase Models: Is there voltage to terminal 3 of CR1?

If yes, continue to next step.

7 Is there voltage to terminal 5 of CR1? If yes, continue to

next step.

8 Is there voltage to terminal 3 of the motor? If yes,

continue to next step.

9 Is there voltage across the coil of CR1? If yes, continue to

next step.

10 Does CR1 operate properly? If yes, continue with Step

13.

11 3 Phase Models: Is there voltage to the input of fan motor

switch? If yes, continue to next step.

12 Is there voltage out from the fan motor switch? If yes,

continue to next step.

13 Is there voltage to the input of the cabinet limit? If yes,

continue to next step.

14 Is there voltage to the output of the cabinet limit? If yes,

continue to next step

15 Is there voltage to COM terminal of the airflow switch?

If yes, continue to next step.

16 Is there voltage to the N.O. terminal of the airflow switch?

If yes, continue to next step.

17 Is there voltage to the input of the stove limit? If yes,

continue to next step.

18 Is there voltage to the output of the stove limit? If yes,

continue to next step.

19 Is there voltage to terminal 2 of the ignition control?

If yes, continue to next step.

Correct wiring between H2-5 and H2-13 on the micro control.

Check for proper thermistor operation. Replace micro control if necessary.

Correct wiring between motor relay and micro.

Replace motor relay.

Correct wiring between CR1 and motor relay.

Continue with Step 8.

Replace motor.

Correct wiring between CR1 and motor.

Replace CR1.

Correct wiring to fan motor switch?

Replace fan motor.

Correct wiring between cabinet limit and CR1.

Replace cabinet limit.

Correct wiring between airflow switch and cabinet limit.

Check for proper operation and airflow. Replace airflow switch if necessary.

Correct wiring between stove limit and airflow switch.

Check for proper airflow. Replace stove limit if necessary.

Correct wiring between ignition control and stove limit.

W002

(continued)

34 M411429

Page 35

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.

(continued)

Step Problem If No, then

20 Does the igniter spark? If yes, continue to next step. Check for proper gap on igniter and check for proper

resistance of ignition cable. Replace if necessary.

21 Is there voltage at terminal 1 of the ignition control? If yes,

continue to next step.

21 Is there voltage across the gas valve? If yes, continue to

next step.

22 Is there a flame? If yes, continue to next step. Check for gas flow and proper gas pressure. Replace gas

24 Unit operational.

Replace ignition control.

Correct wiring to gas valve.

valve or coils of gas valve.

W002

M411429 35

Page 36

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.

39. OM MODELS: NO FAN MOTOR ROTATION WITH CYCLE SELECTED AND START PRESSED 208-240 Volt/60 Hertz/3 Phase and 480 Volt/60 Hertz/3 Phase CE Reversing Models 208-240 Volt/60 Hertz/3 Phase and 460-480 Volt/60 Hertz/3 Phase CG Reversing and CSH Models

Step Problem If No, then

1 Is there voltage across the primary of the transformer?

If yes, continue to next step.

2 Is there 24 VAC across terminals 2 & 3 of the transformer

secondary? If yes, continue to next step.

3 Is there voltage to the COM of the door switch?

If yes, continue to next step.

4 Is there voltage to the N.O. terminal of the door switch?

If yes, continue to next step.

5 Is there voltage to H2-8 of micro control? If yes, continue

to next step.

6 Is there voltage to H2-7 of micro control? If yes, continue

to next step.

7 Is there voltage across the coil of the M contactor? If yes,

continue to next step.

8 Is there voltage to L1, L2 and L3 of the M contactor?

If yes, continue to next step.

9 Is there voltage toT1, T2 and T3 of the M contactor?

If yes, continue to next step.

10 Is there voltage across L1, L2 and L3 of the motor?

If yes, continue to next step.

11 Unit operational.

Correct wiring to transformer. Check fuses.

Replace transformer.

Correct wiring to door switch. Check fuse.

Check door switch and switch rod for proper operation. Replace if necessary.

Correct wiring between micro control and door switch.

Replace micro control.

Correct the wiring to the M contactor.

Correct wiring between M contactor and supply voltage.

Replace M contactor.

Correct wiring between motor and M contactor.

W002

36 M411429

Page 37

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.

40. MM MODELS: FAN MOTOR DOES NOT RUN WITH DOOR CLOSED, CYCLE SELECTED AND START BUTTON PRESSED 208-240 Volt/60 Hertz/3 Phase Gas and Steam Reversing and Nonreversing 480 Volt/60 Hertz/3 Phase Gas Nonreversing 480 Volt/60 Hertz/3 Phase Steam Reversing

Step Problem If No, then

1 Is there voltage to the COM of the door switch?

If yes, continue to next step.

2 Is there 120 VAC to the N.O. terminal of the door switch?

If yes, continue to next step.

3 Is there 120 VAC to terminal P2 of the micro control?

If yes, continue to next step.

4 Is there 120 VAC to terminal P1 of the micro control?

If yes, continue to next step.

5 Is there 120 VAC across the coil of the motor contactor?

If yes, continue to next step.

6 Is there voltage to terminals L1, L2, and L3 of motor

contactor? If yes, continue to next step.

7 Is there voltage at terminals T1, T2 and T3 of the M

contactor? If yes, continue to next step.

8 Is there voltage to L1, L2 and L3 of motor? If yes,

continue to next step.

9 Replace motor.

Correct wiring between door switch and L1 supply for 208-240 Volt units. Check between door switch and X1 of transformer for 480 Volt units.

Check for proper operation of door switch arm and/or replace door switch.

Correct wiring between door switch and micro control.

Replace micro control.

Correct wiring to the coil of motor contactor.

Correct wiring between motor contactor and terminals L1, L2, L3 and TB1.

Replace motor contactor.

Correct wiring between motor and motor contactor.

W002

NOTE: Make sure fuse on x1 of transformer is operational (240 Volt and 480 Volt/60 Hertz/3 Phase units).

M411429 37

Page 38

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.

41. MM MODELS: CYLINDER MOTOR DOES NOT RUN OR REVERSE WITH DOOR CLOSED, CYCLE SELECTED AND START BUTTON PRESSED IN REVERSING MODE OR NONREVERSING MODE 480 Volt/60 Hertz/3 Phase Steam Reversing and 208-240 Volt/60 Hertz/3 Phase Gas and Steam Reversing Models

Step Problem If No, then

1 Is there120 VAC to the COM terminal of the door switch?

If yes, continue to next step.

2 Is there 120 VAC to the N.O. terminal of the door switch?

If yes, continue to next step.

3 Is there 120 VAC to terminal P2 of the micro control? If

yes, continue to next step.

4 Is there 120 VAC to terminal P1 of the micro control? If

yes, continue to next step.

5 Is there 120 VAC across the coils of the motor contactor?

If yes, continue to next step.

6 Is there voltage to terminals L1, L2, and L3 of motor

contactor? If yes, continue to next step.

7 Is there voltage at terminals T1, T2 and T3 of the M

contactor? If yes, continue to next step.

8 Is there voltage to terminals T1, T2, T3 on the forward

contactor and voltage to terminals U, V, and W on the reversing contactor? If yes, continue to next step.

9 Is there voltage to L1, L2, L3 on the forward contactor or

voltage to terminals X, Y, and Z on the reversing contactor? If yes, continue to next step.

10 Is there voltage to L1, L2 and L3 at the cylinder motor? If

yes, continue to step 16.

11 Is there voltage across the coils of either the forward or

reversing contactor? If yes, replace either the forward or reversing contactor.

12 Is there voltage at the CW or CCW terminal on the solid

state timer? If yes, correct wiring between the solid state timer and either the forward or reversing coil.

13 Is there voltage at L1 of the solid state timer? If yes,

replace solid state timer.

14 Is there voltage to the output of the auxiliary contacts on

the motor contactor? If yes, correct wiring between motor contactor and solid state timer.

15 Is there voltage to the input side of the auxiliary contacts

on the motor contactor? If yes, replace motor contactor

16 Unit operational.

Correct wiring between door switch and L1 supply for 208-240 units. Check transformer on 480 Volt.

Check for proper operation of door switch arm and/or replace door switch.

Correct wiring between door switch and micro control.

Replace micro control.

Correct wiring to the coil of motor contactor.

Correct wiring between motor contactor terminals and L1, L2, L3 of TB1.

Replace motor contactor.

Correct wiring between forward contactor and motor contactor and /or correct wiring between reverse contactor and motor contactor.

Continue to Step 11.

Correct wiring between cylinder motor and forward or reversing contactor.

Continue to next step.

Correct wiring between motor contactor and TB1-L1 supply.

W002

NOTE: If the unit will not reverse when reversing is selected, check for proper operation and wiring of reversing switch. Replace if necessary.

38 M411429

Page 39

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.

42. MM MODELS: NO HEAT WITH CYCLE SELECTED, UNIT RUNNING AND CALLING FOR HEAT 120 Volt/60 Hertz/1 Phase and 208-240 Volt/60 Hertz/1 Phase Gas and Steam Nonreversing 480 Volt/60 Hertz/3 Phase and 208-240 Volt/60 Hertz/3 Phase Steam Reversing and Nonreversing

Step Problem If No, then

1 Is there voltage to COM terminal of the micro control?

If yes, continue to next step.

2 Is there voltage to the N.O. terminal of the micro control?

If yes, continue to next step for gas models, to step 20 for steam models.

3 Is there voltage to the input of the stove high limit? If yes,

continue to next step.

4 Is there voltage to the output of the stove high limit? If yes,

continue to next step.

5 Is there voltage to the N.O. terminal of the airflow switch?

If yes, continue to next step.

6 Is there voltage at COM of the airflow switch? If yes,

continue to next step.

7 Is there voltage to the input of the cabinet limit? If yes,

continue to next step.

8 Is there voltage to the output of the cabinet limit? If yes,

continue to next step.

9 Is there voltage to terminal 1 of CR2? If yes, continue to

next step.

10 Is there voltage to terminal 3 of the CR2 If yes, continue to

next step.

11 Is there voltage to L1 of I.E.I. board? If yes, continue to

next step.

12 Is there voltage across gas valve coils? If yes, continue to

next step.

13 Is the igniter sparking? If yes, continue to next step. Check resistance of High Voltage lead (5k and 20k).

14 Is there gas flow through the valve? If yes, continue to step

22.

15 Is there voltage across the coil of CR2. If yes, continue to

next step.

16 Is there 120 VAC on terminal 3 of motor? If yes, correct

wiring between CR2 and motor. Continue to step 22.

17 Is there voltage across the coil of the steam valve? If yes,

continue to next step.

18 Does the unit heat? If yes, continue to next step. Check for proper steam supply. Replace steam valve if

19 Unit operational.

Correct wiring between door switch and micro control.

Replace micro.

Correct wiring between stove high limit and micro control.

Check for proper airflow. If airflow is good, replace stove high limit.

Correct wiring between airflow switch and stove high limit.

Check for proper airflow and function of airflow switch. Replace airflow switch if necessary.

Correct wiring to between cabinet limit and airflow switch.

Replace cabinet limit.

Correct wiring between CR2 and cabinet limit.

Continue with step 16.

Correct wiring between I.E.I. board and CR2.

Check wiring. Replace I.E.I. board if necessary.

Replace if necessary. Check for proper gas pressure. Replace gas valve if

necessary. Replace CR2.

Replace motor.

Correct wiring to steam valve.

necessary.

W002

M411429 39

Page 40

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.

43. MM MODELS: NO HEAT WITH CYCLE SELECTED, UNIT RUNNING AND CALLING FOR HEAT 208-240 Volt/60 Hertz/3 Phase Gas Reversing

Step Problem If No, then

1 Is there voltage to the COM terminal of the micro control?

If yes, continue to next step.

2 Is there voltage to the N.O. terminal of the micro control? If

yes, continue to next step.

3 Is there voltage to the COM terminal of the airflow switch?

If yes, continue to next step.

4 Is there voltage to the N.O. contact of the airflow switch?

If yes, continue to next step.

5 Is there voltage to the input of the stove limit? If yes,

continue to next step.

6 Is there voltage to the output of the stove limit? If yes,

continue to next step.

7 Is there voltage to the input of the cabinet high limit? If yes,

continue to next step.

8 Is there voltage to the output side of the cabinet high limit?

If yes, continue to next step.

9 Is there voltage to L1 of the I.E.I. board? If yes, continue to

next step.

10 Is there voltage across V1 and V2 of the I.E.I. board? If

yes, continue to next step.

11 Is there voltage across the coils of the gas valve? If yes,

continue to next step. 12 Does the unit ignite? If yes, continue to next step. Continue to next step. 13 Is there a spark? If yes, continue to next step. Check for proper igniter gap. Check for proper resistance

14 Is there a gas flow through the valve? If yes, continue to

next step. 15 Unit operational.

Correct wiring between door switch and micro control.

Replace the micro control.

Correct wiring between airflow switch and micro control.

Check for proper operation of airflow switch and airflow. Replace airflow switch if necessary.

Correct wiring between stove limit and airflow switch.

Check for proper airflow and flame pattern. Replace stove high limit if necessary.

Correct wiring between cabinet high limit and stove high limit.

Check for proper airflow. Replace cabinet limit if necessary.

Correct wiring between I.E.I. board and cabinet high limit.

Make sure unit is not in flame lockout. Replace I.E.I. board if necessary.

Correct wiring between gas valves and I.E.I. board.

of high voltage lead, 5 k to 25 k ohms. Check to see if gas line is on and that the gas line was

bled of air. Also, check for proper gas pressure.

W002

(continued)

40 M411429

Page 41

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.

44. OM REVERSING MODELS: NO CYLINDER ROTATION OR REVERSING CAPABILITIES 208-240 Volt/60 Hertz/3 Phase and 480 Volt/60 Hertz/3 Phase CE Models 208-240 Volt/60 Hertz/3 Phase and 460-480 Volt/60 Hertz/3 Phase CG and CSH Models

Step Problem If No, then

1 Is there voltage across the primary of the transformer?

If yes, continue to next step.

2 Is there voltage across terminals 2 & 3 of the transformer

secondary? If yes, continue to next step.

3 Is there voltage to the COM of the door switch?

If yes, continue to next step.

4 Is there voltage to the N.O. terminal of the door switch?

If yes, continue to next step.

5 Is there voltage to H2-8 terminal of micro control?

If yes, continue to next step for forward rotation, or step 11 for reverse rotation.

6 Forward Rotation: Is there voltage to H2-3 of micro

control? If yes, continue to next step.

7 Is there voltage across the coil of the forward relay?

If yes, continue to next step.

8 Is there voltage to terminals L1, L2 and L3 of the forward

relay? If yes, continue to next step.

9 Is there voltage to terminals T1, T2 and T3 of the forward

relay? If yes, continue to next step.

10 Is there voltage across L1, L2 and L3 of the motor?

If yes, continue step 16.

11 Reverse Rotation: Is there voltage to H2-4 of micro

control? If yes, continue to next step.

12 Is there voltage across the coil of the reverse relay?

If yes, continue to next step.

13 Is there voltage to terminals X, Y and Z of the reversing

relay? If yes, continue to next step.

14 Is there voltage to terminals U, V and W of the reversing

relay? If yes, continue to next step.

15 Is there voltage across L1, L2 and L3 of the motor?

If yes, continue to next step. 16 Does the motor turn? If yes, continue to next step. Replace motor. 17 Does the cylinder rotate? If yes, continue to next step. Check drive components between motor and cylinder. 18 Unit operational.

Correct wiring between transformer and supply voltage. Check fuses.

Replace transformer.

Correct wiring to door switch. Check fuses.

Correct wiring and check fuses.

Correct wiring between micro control and door switch.

Make sure unit is in the forward portion of rotation. Replace micro control.

Correct the wiring to the relay.

Correct wiring between relay and supply voltage.

Replace forward relay.

Correct wiring between motor and forward relay.

Make sure unit is in the reverse portion of rotation. Replace micro control.

Correct the wiring to the relay.

Correct wiring between relay and supply voltage.

Replace reversing relay.

Correct wiring between motor and reversing relay.

W002

M411429 41

Page 42

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.

45. MM MODELS: NO DISPLAY AFTER PRESSING THE ON/SELECT KEYS 120 Volt/60 Hertz/1 Phase and 208-240 Volt/60 Hertz/1 Phase Gas and Steam Nonreversing 480 Volt/60 Hertz/3 Phase and 208-240 Volt/60 Hertz/3 Phase Gas and Steam Reversing/Nonreversing

Step Problem If No, then

1 Is there 120 VAC across COM and Neutral (P3) terminals

on PC board? If yes, replace PC board.

Correct wiring between TB1-L1 and COM on PC board or between TB1-N and P3 (Neutral) on PC board for low voltage. Correct wiring between COM on PC board and X1 of transformer for 480 Volt/60 Hertz/3 Phase voltage.

NOTE: Make sure fuse on X1 line of transformer is operational. Used for 480 Volt/60 Hertz/3 Phase voltage.

W002

NOTE: If unable to change settings, the key board had been manually locked out. To lock or unlock, press and hold the START pad and press TIME.

46. MM MODELS: MOTOR DOES NOT RUN WITH DOOR CLOSED, CYCLE SELECTED AND START BUTTON PRESSED 208-240 Volt/60 Hertz/3 Phase Gas and Steam Reversing and Nonreversing 480 Volt/60 Hertz/3 Phase Gas Nonreversing 480 Volt/60 Hertz/3 Phase Steam Reversing

Step Problem If No, then

1 Is there voltage to the COM of the door switch? If yes,

continue to next step.

2 Is there 120 VAC to the N.O. terminal of the door switch?

If yes, continue to next step.

3 Is there 120 VAC to terminal P2 of the micro control? If

yes, continue to next step.

4 Is there 120 VAC to terminal P1 of the micro control? If

yes, continue to next step.

5 Is there 120 VAC across the coil of the motor contactor? If

yes, continue to next step.

6 Is there voltage to terminals L1, L2, and L3 of motor

contactor? If yes, continue to next step.

7 Is there voltage at terminals T1, T2 and T3 of the M

contactor? If yes, continue to next step.

8 Is there voltage to L1, L2 and L3 at motor? If yes, continue

to next step.

9 Replace motor.

Correct wiring between door switch and L1 supply for 208-240 Volt units. Check between door switch and X1 of transformer for 480 Volt/3 Phase units.

Check for proper operation of door switch arm and/or replace door switch.

Correct wiring between door switch and micro control.

Replace micro control.

Correct wiring to the coil of motor contactor.

Correct wiring between motor contactor and terminals L1, L2, L3 and TB1.

Replace motor contactor.

Correct wiring between motor and motor contactor.

NOTE: Make sure fuse on x1 of transformer is operational (480 Volt/60 Hertz/3 Phase units).

42 M411429

Page 43

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.

47. MM MODELS: CYLINDER MOTOR DOES NOT RUN OR REVERSE WITH DOOR CLOSED, CYCLE SELECTED AND START BUTTON PRESSED IN REVERSING MODE OR NONREVERSING MODE 480 Volt/60 Hertz/3 Phase Steam Reversing and 208-240 Volt/60 Hertz/3 Phase Gas and Steam Reversing Models

Step Problem If No, then

1 Is there120 VAC to the COM terminal of the door switch?

If yes, continue to next step.

2 Is there 120 VAC to the N.O. terminal of the door switch?

If yes, continue to next step.

3 Is there 120 VAC to terminal P2 of the micro control?

If yes, continue to next step.

4 Is there 120 VAC to terminal P1 of the micro control?

If yes, continue to next step.

5 Is there 120 VAC across the coils of the motor contactor?

If yes, continue to next step.

6 Is there voltage to terminals L1, L2, and L3 of motor

contactor? If yes, continue to next step.

7 Is there voltage at terminals T1, T2 and T3 of the M

contactor? If yes, continue to next step.

8 Is there voltage to terminals T1, T2, T3 on the forward

contactor and voltage to terminals U, V, and W on the reversing contactor? If yes, continue to next step.

9 Is there voltage to L1, L2, L3 on the forward contactor or

voltage to terminals X, Y, and Z on the reversing contactor? If yes, continue to next step.

10 Is there voltage to L1, L2 and L3 at motor? If yes, continue

to step 16.

11 Is there voltage across the coils of either the forward or

reversing contactor? If yes, replace either the forward or reversing contactor.

12 Is there voltage at the CW or CCW terminal on the solid

state timer? If yes, correct wiring between the solid state timer and either the forward or reversing coil.

13 Is there voltage at L1 of the solid state timer?

If yes, replace solid state timer.

14 Is there voltage to the output of the auxiliary contacts on

the motor contactor? If yes, correct wiring between motor contactor and solid state timer.

15 Is there voltage to the input side of the auxiliary contacts on

the motor contactor? If yes, replace motor contactor.

16 Unit operational.

Correct wiring between door switch and L1 supply for 208-240 units. Check transformer on 480 Volt machines.

Check for proper operation of door switch arm and/or replace door switch.

Correct wiring between door switch and micro control.

Replace micro control.

Correct wiring to the coil of motor contactor.

Correct wiring between motor contactor terminals and L1, L2, L3 of TB1.

Replace motor contactor.

Correct wiring between forward contactor and motor contactor and /or correct wiring between reverse contactor and motor contactor.

Continue to Step 11.

Correct wiring between cylinder motor and forward or reversing contactor.

Continue to next step.

Correct wiring between motor contactor and TB1-L1 supply.

W002

NOTE: If the unit will not reverse when reversing is selected, check for proper operation and wiring of reversing switch. Replace if necessary.

M411429 43

Page 44

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.

48. MM NONREVERSING MODELS: MOTOR DOES NOT RUN WITH DOOR CLOSED, CYCLE SELECTED AND START BUTTON PRESSED 120 Volt/60 Hertz/1 Phase Gas and Steam 208-240 Volt/60 Hertz/3 Phase Gas 480 Volt/60 Hertz/3 Phase Steam

NOTE: Voltage checks referenced to are for neutral unless stated otherwise.

Step Problem If No, then

1 Is there120 VAC to the COM of the door switch?

If yes, continue to next step.

2 Is there 120 VAC to the N.O. terminal of the door switch?

If yes, continue to next step.

3 Is there 120 VAC to terminal P2 of the micro control?

If yes, continue to next step.

4 Is there 120 VAC to terminal P1 of the micro control?

If yes, continue to next step for gas models, step 9 for steam models.

5 Gas Models: Is there 120 VAC across the coils of the CR1?

If yes, continue to next step for gas models, step 9 for steam models.

6 Is there 120 VAC to terminal 1 on CR1? If yes, continue to

next step.

7 Is there 120 VAC to terminal 3 on CR1? If yes, continue to

next step for 120 VAC units, or step 12 for 240 VAC units.

8 Is there 120 VAC across the terminals 1 and 4 of the motor?

If yes, replace motor. 9 STEAM: Is there 120 VAC across M coil? Correct the wiring to M coil. 10 Is there 120 VAC on terminal L1 of the motor relay for

single phase units, or across L1, L2, and L3 for three phase

units? If yes, continue to next step. 11 Is there 120 VAC on terminal T1 of the motor relay for

single phase units, or across T1, T2, and T3 for three phase

units? If yes, continue to step 8. 12 Is there 120 VAC to terminal 1 of the motor?

If yes, continue to next step. 13 Is there 240 VAC across terminals 1 and 4 of the motor?

If yes, replace motor. 14 Is there 120 VAC to terminal 8 of CR1? If yes, continue to

next step. 15 Is there 120 VAC to terminal 7 of CR1? If yes, correct

wiring between CR1-7 and terminal 4 of the motor.

Correct wiring between door switch and L1 supply for low voltage units. Check between door switch and X1 of transformer for high voltage units.

Check for proper operation of door switch arm and/or replace door switch.

Correct wiring between door switch and micro control.

Replace micro control.

Correct wiring to the coil of CR1.

Correct wiring between terminal 1and door switch.

Replace CR1

Correct wiring to motor.

Correct wiring between motor and motor relay and the terminal block.

Replace motor control relay.

Correct wiring between motor CR1.

Continue to next step.

Correct wiring between CR1-8 and L2.

Replace CR1.

W002

44 M411429

Page 45

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.

49. CD MODELS: NO START WITH VEND SATISFIED AND START BUTTON PRESSED IN 208-240 Volt/60 Hertz/3 Phase Gas Nonreversing

NOTE: All voltage checks are referenced to neutral unless stated otherwise.

Step Problem If No, then

1 Is there voltage to COM terminal of switch A?

If yes, continue to next step.

2 Is there voltage to the NC terminal of switch A?

If yes, continue to next step.

3 Is there voltage to the common terminal of the door switch?

If yes, continue to next step.

4 With the door closed, is there voltage to the N.O. terminal

of the door switch? If yes, continue to next step.

5 Is there voltage to the input side of the Push-To-Start

button? If yes, continue to next step.

6 Is there voltage to the input side of the auxiliary contacts on

the motor contactor? If yes, continue to next step.

7 Is there voltage across the coil of the motor control

contactor?

8 If the start button is released, does the motor contactor stay

in the made position? If yes, continue to next step.

9 Is there voltage to L1, L2, and L3 of the motor contactor?

If yes, continue to next step.

10 Is there voltage to T1, T2, and T3 of the motor contactor?

If yes, continue to next step.

11 Is there voltage to L1, L2, and L3 of the motor?

If yes, continue to next step.

12 Is the internal wiring of the motor correct for the supply

voltage? 13 Thermal overload cycled, allow motor to cool and recheck. Replace motor. 14 Unit operational.

Correct wiring between L1 and switch A.

Check for proper operation of switch A. Replace switch A if necessary.

Correct wiring between door switch and switch A.

Check door switch for proper operation, replace if necessary.

Correct wiring between start switch and door switch.

Correct wiring between motor contactor and door switch.

Correct wiring between motor contactor and Push-ToStart button.

Check for proper operation of motor contactor, replace if necessary.

Correct wiring between motor contactor and L1, L2 and L3 supply.

Check for proper operation. Replace motor contactor if necessary.

Correct wiring between motor contactor and motor.

Change the wiring accordingly.

W002

M411429 45

Page 46

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.

50. CD MODELS: NO HEAT WITH VEND SATISFIED AND UNIT RUNNING 208-240 Volt/60 Hertz/3 Phase Gas Nonreversing

NOTE: All voltage checks are referenced to neutral unless stated otherwise.

Step Problem If No, then

1 Is there voltage to the input of the motor switch?

If yes, continue to next step.

2 Is there voltage to the output of the motor switch?

If yes, continue to next step.

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

If yes, continue to next step.

4 Is there voltage to the output of the cabinet limit?

If yes, continue to next step.

5 Is there voltage to the COM terminal of the airflow switch?

If yes, continue to next step.

6 Is there voltage to the N.O. terminal of the airflow switch?

If yes, continue to next step.

7 Is there voltage to the input of the stove limit?

If yes, continue to next step.

8 Is there voltage to the output of the stove limit?

If yes, continue to next step.

9 Is there voltage to the N.C. terminal of switch B?

If yes, continue to next step.

10 Is there voltage to the COM terminal of switch B?

If yes, continue to next step.

11 Is there voltage to the input of the adjustable bulb

thermostat? If yes, continue to next step.

12 Is there voltage to the output of the adjustable bulb

thermostat? If yes, continue to next step.

13 Is there voltage to the ignition control board?

If yes, continue to next step.

14 Does the igniter spark? If yes, continue to next step. Check for proper igniter gaps and resistance for high

15 Is there voltage across V1 and V2 of the IEI board?

If yes, continue to next step.

16 Is there voltage across the coils of the gas valve?

If yes, continue to next step. 17 Is there a flame? If yes, unit is operational. Continue to next step. 18 Is there gas pressure on the output side of the gas valve?

If yes, continue to next step. 19 Check for proper gas pressure. 3.5 water column inches for

Natural Gas, 10.5 W.C.I. for L.P. Gas. † Proper gaps for igniter: 5/16 above burner and 5/32 between electrode and grounding tab. The proper resistance of the high

voltage lead is between 5,000 Ohms and 25,000 Ohms.

Correct wiring to the input of motor switch.

Replace motor.

Correct wiring between cabinet limit and motor switch.

Check for proper operation, replace if necessary.

Correct wiring between airflow switch and cabinet limit.

Check for proper airflow and function of the airflow switch. Replace airflow switch if necessary.

Correct wiring between stove limit and airflow switch.

Check for blockage and proper airflow. Replace stove limit if necessary.

Correct wiring between switch B and stove limit.

Check for proper operation, replace switch B if necessary.

Correct wiring between thermostat and switch B.

Replace adjustable bulb thermostat.

Correct wiring between IEI board and thermostat.

voltage lead. Replace IEI board.

Correct wiring between gas valve and IEI board.

Replace gas valve.

W002

46 M411429

Page 47

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.

51. CD MODELS: NO HEAT WITH VEND SATISFIED AND UNIT RUNNING 120 Volt/60 Hertz/1 Phase and 240 Volt/60 Hertz/1 Phase Gas Nonreversing Models

Step Problem If No, then

1 Is there voltage on red wire of the motor?

If yes, continue to next step.

2 Is there voltage to the input of the cabinet high limit?

If yes, continue to next step.

3 Is there voltage to the output of the cabinet high limit?

If yes, continue to next step.

4 Is there voltage to the COM terminal of the airflow switch?

If yes, continue to next step.

5 Is there voltage to the N.O. terminal of the airflow switch?

If yes, continue to next step.

6 Is there voltage to the input side of the stove high limit

thermostat? If yes, continue to next step.

7 Is there voltage to the output side of the stove high limit

thermostat? If yes, continue to next step.

8 Is there voltage to the N.C. terminal of switch B on the coin

drop? If yes, continue to next step.

9 Is there voltage to the COM terminal of switch B?

If yes, continue to next step.

10 Is there voltage to the input side of the adjustable

thermostat? If yes, continue to next step.

11 Is there voltage to the output side of the adjustable

thermostat? If yes, continue to next step.

12 Is there voltage to L1 of the ignition control board (IEI

board)? If yes, continue to next step.

13 Does the igniter spark? If yes, continue to next step. Check for proper gap on igniter and check for proper

14 Is there voltage across V1 and V2 of the IEI board?

If yes, continue to next step.

15 Is there voltage across the coils of the gas valve?

If yes, continue to next step. 16 Is there a flame? If yes, unit is operational. Continue to next step. 17 Is there gas pressure on the output side of the gas valve?

If yes, continue to next step. 18 Check for proper gas pressure. 3.5 water column inches for

Natural Gas, 10.5 W.C.I. for L.P. Gas. † Proper gaps for igniter: 5/16 above burner and 5/32 between electrode and grounding tab. The proper resistance of the high

voltage lead is between 5,000 Ohms and 25,000 Ohms.

Replace motor.

Correct wiring between cabinet high limit and motor.

Check for proper operation. Replace if necessary.

Correct wiring between airflow switch and cabinet high limit.

Check for proper operation and airflow. Replace switch if necessary.

Correct wiring between stove limit and airflow switch.

Check for proper operation and airflow. Replace stove high limit if necessary.

Correct wiring between switch B and stove high limit.

Check for proper operation of coin drop. Replace switch B if necessary.

Correct wiring between switch B and thermostat.

Replace thermostat.

Correct wiring between ignition control board and thermostat.

resistance of high voltage lead.† Replace lead if necessary.

Replace IEI board.

Correct wiring between gas valve and IEI board.

Replace gas valve.

W002

M411429 47

Page 48

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.

52. CD MODELS: NO START WITH VEND SATISFIED AND START BUTTON PUSHED 240 Volt/60 Hertz/1 Phase Gas Nonreversing

NOTE: All voltage checks are referenced to neutral unless stated otherwise.

Step Problem If No, then

1 Is there voltage to the NC terminal of switch A?

If yes, continue to next step.

2 Is there voltage to COM terminal of switch A?

If yes, continue to next step.

3 Is there voltage to COM terminal of the door switch?

If yes, continue to next step.

4 With the door closed, is there voltage to the N.O. terminal

of the door switch? If yes, continue to next step.

5 Is there voltage across the coil of the control relay (CR)?

If yes, continue to next step.

6 Is there voltage to terminal 5 of the motor? If yes, continue

to next step.

7 Is there voltage to the input side of the start switch?

If yes, continue to next step.

8 With the start button pressed in, is there voltage to the

output side of the start button? If yes, continue to next step.

9 Is there voltage to terminal 1 of the control relay?

If yes, continue to next step.

10 Is there voltage to terminal 3 of the control relay? If yes,

continue to next step.

11 Is there voltage to terminal 1 of the motor? If yes, continue

to next step. 12 Does the motor run? If yes, continue to next step. Replace the motor. 13 Unit operational.

Correct wiring between L1 on TBI and switch A.

Check for proper operation of switch A. Replace switch A if necessary.

Correct wiring between door switch and switch A of the rotary coin drop.

Check door switch for proper operation, replace if necessary.

Correct wiring to the control relay.

Correct wiring between motor and door switch.

Correct wiring between start switch and door switch.

Replace start switch.

Correct wiring to terminal 1 of the control relay.

Check for proper operation. Replace control relay if necessary.

Correct wiring between motor and start switch.

W002

NOTE: If the motor only runs with the start switch pressed in, that means the centrifugal switch in the motor is bad. Replace the motor.

48 M411429

Page 49

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.

53. CD MODELS: NO START WITH VEND SATISFIED AND START BUTTON PUSHED 120 Volt/60 Hertz/1 Phase Gas Nonreversing

NOTE: All voltage checks are referenced to neutral unless stated otherwise.

Step Problem If No, then

1 Is there voltage to the NC terminal of switch A?

If yes, continue to next step.

2 Is there voltage to COM terminal of switch A?

If yes, continue to next step.

3 Is there voltage to COM terminal of the door switch?

If yes, continue to next step.

4 With the door closed, is there voltage to the N.O. terminal

of the door switch? If yes, continue to next step.

5 Is there voltage to terminal 5 of the motor? If yes, continue

to next step.

6 Is there voltage to the input side of the start switch?

If yes, continue to next step.

7 With the start button pressed in, is there voltage to the

output side of the start button? If yes, continue to next step.

8 Is there voltage to terminal 1 of the motor? If yes, continue

to next step. 9 Does the motor run? If yes, continue to next step. Replace the motor. 10 Unit operational.

Correct wiring between L1 on TBI and switch A.

Check for proper operation of switch A. Replace switch A if necessary.

Correct wiring between door switch and switch A of the rotary coin drop.

Check door switch for proper operation, replace if necessary.

Correct wiring between motor and door switch.

Correct wiring between start switch and door switch.

Replace start switch.

Correct wiring between motor and start switch.

W002

NOTE: If the motor only runs with the start switch pressed in, that means the centrifugal switch in the motor is bad. Replace the motor.

M411429 49

Page 50

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, DO NOT connect a “High Leg” or “Stinger Leg” to a single phase machine. On a three phase machine, if there is a “High Leg” or “Stinger Leg” it should be connected to L3.

Grounding Instructions

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. 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

W069

M411429 51

Page 51

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

IMPORTANT: References made to the left or right hand direction are taken from the operator’s position facing the front of the tumbler.

54. CONTROL PANEL Refer to Figure 1.

a. Unlock and open access panel. To hold panel

open, swing support rod under panel.

b. Manual Timer and Coin Meter Models

(1) Remove two screws holding control panel

to cabinet.

(2) Lift control panel off top edge of front

panel and pull panel forward just far enough to disconnect wire harness at the plug.

55. PUSH-TO-START SWITCH

a. Remove control panel. b. Remove two screws holding switch, and

mounting bracket (if applicable), to control panel. Refer to Figure 1.

c. Disconnect wires from switch terminals and

remove switch.

NOTE: Refer to wiring diagram when rewiring switch.

56. COOLING, DRYING, OR RUN LIGHT

a. Remove control panel. b. Disconnect light wire leads.

NOTE: On Coin Meter Models, the run light white lead must be joined to the wire harness white lead using a double spade connector. Remove the single spade lug from the replacement run light white wire.

c. Compress locking tabs on sides of light and

push light out through front of control panel. Refer to Figure 2 for Coin Drop Models or Figure 3 for Manual Timer Models.

NOTE: Refer to wiring diagram when rewiring light.

M411429 53

Page 52

Section 5 Service Procedures

ACCESS

PANEL

ATTACHING SCREWS

SUPPORT

ROD

CONTROL PANEL

PUSH-TO-START

SWITCH

TERMINAL

BOARD

SCREWS

T056SE3D

WIRE HARNESS

PLUG

T057SE3A

CONTROL PANEL

BRACKETS

PUSH-TO-START

SWITCH ASSEMBLY

CONTROL

PANEL BRACKET

Figure 1

54 M411429

Page 53

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.

57. RELAY (MANUAL TIMERS MODELS)

a. Remove control panel.

COIN DROP MODELS

TAB

b. Remove two screws holding relay to bracket.

Refer to Figure 3.

c. Disconnect wires from relay.

NOTE: Refer to wiring diagram when rewiring relay.

58. RESISTOR (Models with 208-240Volt/60Hertz Control Circuit)

a. Remove control panel. b. Disconnect resistor leads. Refer to Figure 3.

W002

RUN LIGHT

LOCKING

TAB

CONTROL

Figure 2

PANEL

T005SE1D

NOTE: Refer to wiring diagram when rewiring resistor.

59. COOLING OR DRYING TIMER (New Style)

a. Remove control panel. b. Pull timer knob off timer shaft. Refer to

Figure 3.

c. Remove three screws holding timer to control

panel or mounting bracket.

d. Remove wires from timer terminal board, and

timer motor lead from terminal block.

IMPORTANT: Be sure barrier is installed in proper position when reinstalling drying timer. If either timer is a Robert Shaw timer a barrier must be used. If both timers are Mallory or Greenwald timers, barrier may be discarded.

NOTE: Refer to wiring diagram when rewiring timer.

M411429 55

Page 54

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.

MANUAL TIMER MODELS

TIMER

DRYING

LIGHT

W002

LOCKING

TA BS

COOLING

LIGHT

TIMER

KNOB

60. COOLING OR DRYING TIMER MOTOR (Old Style Timers)

NOTE: Cooling and drying timers used prior to January 1985 were supplied by Greenwald and have serviceable timer motors. After January 1985, Robert Shaw or Mallory timers are used, which do not have serviceable timer motors. These later timers must be replaced as complete assemblies if the timer motor fails.

a. Remove control panel. b. Disconnect motor leads.

RESISTORS

RELAY

BRACKET

T341S

Figure 3

c. Remove screws holding timer motor to

mounting bracket. Refer to Figure 4.

NOTE: Refer to wiring diagram when rewiring timer motor.

d. Replacing Greenwald timer assembly with

Mallory timer assembly:

(1) Remove Greenwald timer assembly. (2) Connect timer terminal wire 3 to terminal

board terminal B.

(3) Connect timer terminal 5 wire to terminal

board terminal C.

56 M411429

Page 55

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.

HEAT

SWITCH

SCREW

TIMER

MOTOR

W002

RUN

SWITCH

TIMER

ASSEMBLY

TU001-SV

Figure 4

61. COIN METER Refer to Figure 5.

a. Remove control panel. b. Disconnect wires from heat and run switches. c. Cut remaining motor wire and joining white

wire at wire nut.

d. Remove four speed nuts holding coin meter to

coin meter frame.

NOTE: Refer to wiring diagram when rewiring coin meter. Connect wires cut in step “c” above with new wire nut.

TIMER

MOTOR

Figure 5

SPEED

NUT

COIN

METER

TU060-SV

M411429 57

Page 56

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

62. COIN METER TIMER MOTOR

a. Remove control panel. b. Remove two screws holding motor to mounting

bracket. Refer to Figure 6.

c. Hold cam and drive fork against inside face of

motor mounting bracket and pull motor free of

cam and drive fork. d. Disconnect motor leads. e. Slide cam and drive fork out from under motor

mounting bracket.

NOTE: Refer to wiring diagram when rewiring timer motor.

MOTOR

MOUNTING

BRACKET

SCREW

remove the switches and actuating bracket parts.

d. Assemble the two switches and the two parts

making up the switch actuating bracket.

e. Actuate the switches a number of times by

manually pressing the actuating plate against the switch lever and plunger to ensure that the actuating parts do not bind. If binding occurs, reposition the actuating plate slightly until the binding stops.

NOTE: Refer to wiring diagram when rewiring switches.

TIMER

SWITCH

ACTUATOR

BRACKET

CAM AND

DRIVE FORK

T007SE1B

TIMER

MOTOR

Figure 6

RUN

63. COIN METER RUN OR HEAT SWITCH Refer to Figure 7.

a. Remove control panel. b. Disconnect wires from switches on timer.

SWITCH

HEAT

SWITCH

Figure 7

T008SE1B

c. Hold switches and actuating bracket under

switches tightly together with one hand while removing two screws holding switches to timing motor mounting bracket. Carefully

58 M411429

Page 57

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

64. CONTROL THERMOSTAT

a. Remove control panel. b. Pull knob off thermostat. Refer to Figure 8. c. Disconnect wires from thermostat. d. Remove two screws holding thermostat to

bracket.

e. Remove wire-way attaching screws. Refer to

Figure 9.

f. Remove screws, wire clips and/or retaining

straps securing thermostat sensing tube in wireway.

g. Later Models: Remove junction box cover

attaching screws. Refer to Figure 9.

IMPORTANT: When reinstalling thermostat, be sure to install all screws and wire clips and replace all retaining straps removed in steps “f” and “g”.

h. Unlock and remove lint panel.

i. Spread locking tabs on sensing probe bracket

and disengage probe from bracket. Refer to

Figure 10.

IMPORTANT: When reinstalling thermostat, be sure to secure sensing probe with locking tabs on bracket. Refer to Figure 10.

j. Carefully remove thermostat, tube and probe.

IMPORTANT: Do not kink sensing tube when installing thermostat.

NOTE: Refer to wiring diagram when rewiring thermostat.

JUNCTION

BOX

WIRE

TIES

WIRE

WAY

THERMOSTAT

KNOB

SCREWS

SENSING

TUBE

BRACKET

T012SE1B

TU013-SV

THERMOSTAT

SENSING TUBE

Figure 9

Figure 8

M411429 59

Page 58

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.

65. TRANSFORMER (Automatic Pilot Ignition Models) Refer to Figure 11.

a. Remove control panel. b. Disconnect transformer wires at electronic

package.

c. Disconnect remaining wires from transformer

at connectors.

NOTE: Refer to wiring diagram when rewiring transformer.

W002

d. Remove nut holding transformer to cabinet.

SENSING

PROBE

LOCKING

TABS

THERMOSTAT

SENSING PROBE

LINT

SCREEN

THERMOSTAT

SENSING TUBE

WARNING

T014SE3A

Figure 10

60 M411429

Page 59

TRANSFORMER

WIRES

NUT

TRANSFORMER

Section 5 Service Procedures

CONNECTORS

ELECTRONIC

PACKAGE

TU015-SV

Figure 11

M411429 61

Page 60

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.

66. GAS VALVE ASSEMBLY (Automatic Pilot Ignition Models) Refer to Figure 12 and Figure 14.

a. Remove control panel. b. Close gas shut-off valve. c. Disconnect all wires from gas valve terminals

and disconnect gas valve union nuts.

d. Disconnect igniter wire and sensor wire from

electronic package.

e. Disconnect pilot tube from gas valve.

IMPORTANT: Purge air in the gas service line by operating the tumbler in drying mode. Use pipe compound resistant to action of L.P. Gas on all pipe threads.

To reduce risk of fire or explosion, check pipe connections for gas leaks with a noncorrosive leak detection fluid. Do not use an open flame to check for gas leaks!

f. Remove screws holding gas valve and bracket

to stove assembly.

g. Remove spudholder and nipple from left side of

valve and plug from right side of valve.

NOTE: Refer to wiring diagram when rewiring gas valve.

WARNING

W002

W310

COMPRESSION

NUT

FRAME

PLUG

PILOT AND

ELECTRODE

ASSEMBLY

PILOT

TUBE

SCREW

SPUD HOLDER

AND

NIPPLE

Figure 12

SENSOR

WIRE

ELECTRONIC

PACKAGE

ATTACHING

SCREWS

UNION

NUT

ELECTRONIC

PAC KA GE

IGNITER

WIRE

TU020-SV

62 M411429

Page 61

Section 5 Service Procedures

OPERATOR

GAS

VALV E

BODY

Standing Pilot

RESET

ASSEMBLY

MAIN

OPERATOR

GAS VALVE

BODY

Automatic Pilot System

MAGNETIC

OPERATORS

PILOT

OPERATOR

GAS VALVE

BODY

Johnson Controls Glow-Bar

MAIN

COIL

REDUNDANT

COIL

White Rodgers Glow-Bar

MAIN COIL

GAS

VALV E

BODY

GAS

VALV E

BODY

REDUNDANT

COIL

White Rodgers

Instant Electronic Ignition System (IEI)

T002SE3A

Figure 13

M411429 63

Page 62

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

67. ELECTRONIC PACKAGE (Automatic Pilot Ignition Models)

a. Remove control panel. b. Close gas shut-off valve. Refer to Figure 14. c. Disconnect igniter wire and sensor wire from

electronic package.

d. Remove two screws holding electronic package

to gas valve. Refer to Figure 12.

e. Disconnect two operator wires from electronic

package terminals.

NOTE: Refer to wiring diagram when rewiring electronic package.

68. MAIN OR PILOT OPERATOR (Automatic Pilot Ignition Models)

a. Remove electronic package. b. Remove screws holding main or pilot operator

to gas valve body. Refer to Figure 13.

69. GAS VALVE (Standing Pilot Models) Refer to Figure 14.

a. Remove control panel. b. Close gas shut-off valve. c. Disconnect all wires from gas valve terminals

and disconnect gas valve pipe unions.

d. Disconnect thermocouple and pilot tube from

gas valve.

e. Remove screws holding gas valve and bracket

to stove assembly.

f. Remove spudholder from left side of valve and

plug from right side of valve.

70. OPERATOR (Standing Pilot Models)

a. Remove control panel. b. Close gas shut-off valve. Refer to Figure 14. c. Disconnect wires from operator terminals

d. Remove screws holding operator to gas valve

body. Refer to Figure 13.

NOTE: Refer to wiring diagram when rewiring gas valve operator.

71. RESET ASSEMBLY (Standing Pilot Models)

a. Remove control panel. b. Close gas shut-off valve. Refer to Figure 14. c. Disconnect pilot tube and thermocouple from

reset assembly.

d. Remove screws holding reset assembly to gas

valve. Refer to Figure 13.

IMPORTANT: Purge air in the gas service line by operating the tumbler in drying mode. Use pipe compound resistant to action of L.P. Gas on all pipe threads.

WARNING

To reduce risk of fire or explosion, check pipe connections for gas leaks with a noncorrosive leak detection fluid. Do not use an open flame to check for gas leaks!

64 M411429

W310

Page 63

Section 5 Service Procedures

PILOT

BURNER

GAS

VALV E

PILOT

TUBE

THERMOCOUPLE

Standing Pilot Burner

GLOW BAR

IGNITER

UNION

NUTS

UNION

NUTS

SHUT-OFF

GAS VALVE

(Shown in the

ON position)

T016SE1A

GAS SHUT-OFF

VALV E

(Shown in the

ON position)

SENSING

PROBE

PILOT

TUBE

SENSOR

WIRE

UNION NUTS

IGNITER

WIRE

Automatic Pilot Ignition Burner

MOUNTING

PINS

GLOWBAR

IGNITER

GAS

SHUT-OFF

VALV E

UNION

NUTS

GAS SHUT-OFF

VALV E

(Shown in the

ON position)

GAS

VALV E

T017SE1A

DIODE

LOGIC

BOARD

SENSOR

PLUG

Johnson Controls Glow-Bar Ignition Burner

MANIFOLD

UNION

NUT

NIPPLE

GAS

VALV E

SHUT-OFF

T021SE1A

GAS

Instant Electronic Ignition Burner

VALV E

T018SE1A

GAS

OFF

GAS

VALV E

GAS

IGNITER

BRACKET

SPUD HOLDER

NIPPLE

White Rodgers Glow-Bar Ignition Burner

IGNITER

BRACKET

SPARK

IGNITER

HIGH

VOLTAGE

LEAD

INSTANT ELECTRONIC

IGNITION HARNESS

PLUG

T019SE3B

GAS

VALV E

INSTANT

ELECTRONIC

IGNITION

CONTROL

Figure 14

M411429 65

Page 64

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

72. GAS VALVE (Johnson Controls Glow-Bar Models) Refer to Figure 14.

a. Remove control panel. b. Close gas shut-off valve. c. Disconnect all wires from gas valve terminals

and disconnect gas valve union nuts.

d. Remove screws holding gas valve and bracket

to stove assembly.

e. Remove spudholder from left side of valve and

plug from right side of valve.

NOTE: Refer to wiring diagram when rewiring gas valve.

IMPORTANT: Purge air in the gas service line by operating the tumbler in drying mode. Use pipe compound resistant to action of L.P. Gas on all pipe threads.

WARNING

To reduce risk of fire or explosion, check pipe connections for gas leaks with a noncorrosive leak detection fluid. Do not use an open flame to check for gas leaks!

W310

73. MAGNETIC OPERATORS (Johnson Controls Glow-Bar Models)

a. Remove control panel. b. Close gas shut-off valve. Refer to Figure 14. c. Disconnect wires from magnetic operator

terminals.

d. Remove screws holding magnetic operators to

gas valve body. Refer to Figure 13.

74. GAS VALVE (White Rodgers Glow-Bar Models) Refer to Figure 14.

a. Remove control panel. b. Close gas shut-off valve. c. Disconnect all wires from gas valve terminals

and disconnect gas valve union nuts.

d. Remove screws holding gas valve and bracket

to stove assembly.

e. Remove gas valve from mounting bracket.

f. Remove spudholder and nipple from left side of

valve and plug from right side of valve.

IMPORTANT: Purge air in the gas service line by operating the tumbler in drying mode. Use pipe compound resistant to action of L.P. Gas on all pipe threads.

NOTE: Refer to wiring diagram when rewiring gas valve.

75. DIODE LOGIC BOARD (White Rodgers Glow-Bar Models) Refer to Figure 14.

a. Remove control panel. b. Disconnect wires from diode logic board

terminals.

c. Compress tabs on back ends of diode logic

board standoffs and push pins through holes in cabinet wall to free diode logic board.

NOTE: Refer to wiring diagram when rewiring diode logic board.

NOTE: Refer to wiring diagram when rewiring magnetic operators.

66 M411429

Page 65

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

76. MAIN COIL (White Rodgers Glow-Bar Models)

NOTE: The redundant coil cannot be purchased separately. Replace the complete gas valve.

a. Remove control panel. b. Close gas shut-off valve. Refer to Figure 14. c. Disconnect wires from main coil terminals. d. Remove screws holding main coil to gas valve.

Refer to Figure 13.

NOTE: Refer to wiring diagram when rewiring gas valve main coils.

77. IGNITER AND BRACKET (Glow-Bar Models) Refer to Figure 14.

a. Remove control panel. b. Insert tips of 90 degree Tru-Arc pliers into

holes in each igniter mounting clip and spread clips just far enough for igniter removal.

IMPORTANT: Use extreme care when handling the igniter as it is very fragile. Handle igniter by grasping the white ceramic portion only. Do not handle the silicon of the igniter with hands or allow any oil, grease, or other foreign material to contaminate it. Hairline cracks, oil, grease, or other impurities will cause igniter to burn out.

c. Remove screw holding igniter bracket to stove

assembly.

d. Disconnect igniter wires from diode logic

board (White Rodgers) or relay (Johnson Controls).

78. SENSOR (Glow-bar Models)

a. Remove control panel. b. Disconnect wires from sensor. Refer to

Figure 14.

c. Remove screw holding sensor to side of stove

assembly.

NOTE: Refer to wiring diagram when rewiring sensor.

79. IGNITER (Instant Electronic Ignition Models)

a. Remove control panel. b. Disconnect high voltage lead from igniter. c. Remove two screws attaching igniter bracket to

stove assembly.

80. IGNITION CONTROL (Instant Electronic Ignition Models)

a. Remove control panel. b. Disconnect wire harness. c. Remove high voltage lead.

IMPORTANT: Remove circuit board and plastic back as a unit. Handle ignition control unit by sides of board only. Do not contact circuit boards with hands or metal objects. Place unit in clean, dry area away from work area to avoid damage. Do not attempt field repair of the ignition control unit. Attempted repair or tampering with the ignition control unit will void its warranty.

d. Remove two screws attaching ignition control

unit to cabinet frame.

e. Remove ignition control unit.

81. GAS VALVE (Instant Electronic Ignition Models)

a. Remove control panel. b. Close gas shut-off valve. Refer to Figure 14. c. Disconnect all wires from gas valve terminals

and disconnect gas valve pipe unions.

d. Remove screw holding gas valve bracket to

stove.

e. Remove spudholder and manifold from left

side of valve and plug from right side of valve.

f. Remove gas valve from mounting bracket.

IMPORTANT: Purge air in the gas service line by operating the tumbler in drying mode. Use pipe compound resistant to action of L.P. Gas on all pipe threads.

M411429 67

Page 66

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

WARNING

To reduce risk of fire or explosion, check pipe connections for gas leaks with a noncorrosive leak detection fluid. Do not use an open flame to check for gas leaks!

W310

82. MAIN COIL (Instant Electronic Ignition Models)

NOTE: The redundant coil cannot be purchased separately. Replace complete gas valve.

a. Remove control panel. b. Close gas shut-off valve. Refer to Figure 14. c. Disconnect wires from main coil terminals. d. Remove screws holding main coil to gas valve.

Refer to Figure 13.

83. BURNER TUBE Refer to Figure 14.

a. Remove control panel. b. Close gas shut-off valve. c. Disconnect union nut attaching nipple to

spudholder and remove spudholder.

d. Remove screws holding gas valve bracket to

stove assembly.

e. Remove screws holding burner tubes to stove

frame and remove burner tubes.

WARNING

To reduce risk of fire or explosion, check pipe connections for gas leaks with a noncorrosive leak detection fluid. Do not use an open flame to check for gas leaks!

W310

IMPORTANT: Make sure that spudholder and orifices are positioned such that gas will be injected directly down the center of the burner.

CONTACTOR

TERMINAL

BLOCK

ATTACHING

SCREWS

Figure 15

CONTACTOR

T022SE1A

84. CONTACTORS AND TERMINAL BLOCK (Electric Models)

NOTE: Contactors and terminal blocks are located in contactor box at the rear of the tumbler.

a. Remove screw holding cover to contactor box

and remove cover.

b. Remove wires from contactor terminals and

terminal blocks.

NOTE: Refer to wiring diagram when rewiring contactors or terminal blocks.

c. Remove screws holding contactor to box.

d. Remove two screws holding terminal block to

box. Refer to Figure 15.

NOTE: OLDER MODELS - Terminal block consists of two terminal section (one phase) or three terminal sections (three phase) and an end piece snapped together.

NEWER MODELS - Use a 3 pole terminal block.

68 M411429

Page 67

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

85. HEATER ELEMENT (Electric Models) Refer to Figure 16.

NOTE: Remove heater element from the rear of the tumbler.

a. Remove two screws and lift hood assembly off

heater housing.

b. Remove nuts, disconnect wires and buss bars

from element terminals.

ELECTRIC HEATER

NOTE: Refer to wiring diagram when rewiring element terminals.

c. Remove screws attaching element to rear of

heater housing.

d. Slide element toward front of tumbler and

carefully lift element up and out of heater housing.

NOTE: Each tumbler is equipped with three elements. Remove each element individually.

WIRES TO

CONTACTOR

BOX

NUT

BUSS

BAR

HEATER

ELEMENTS

(3)

SCREW

TU198-PT

Figure 16

M411429 69

Page 68

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

86. STOVE HIGH LIMIT THERMOSTAT (Gas Models)

NOTE: Steps “a” through “d”, and “f” apply only to energy saver models. The stove high limit thermostat is more readily accessible on non-energy saver models.

a. Remove control panel. b. Remove screw holding cover plate to wire-way

(older models); or, remove screw holding cover to junction box or airflow switch box (older models). Remove cover. Refer to Figure 17.

c. Disconnect stove high limit thermostat wires in

wire-way or in junction box.

d. Remove conduit nut from BX cable on inside of

wire-way or junction box. Refer to Figure 17.

AIRFLOW

SWITCH

CONDUIT

NUT

SCREWS

STOVE

HIGH LIMIT

THERMOSTAT

e. Remove two screws holding thermostat and

bracket to rear side of burner. Refer to Figure 17.

NOTE: This will allow the conduit to follow through between burner and cabinet when thermostat and bracket assembly are slid toward front of tumbler (energy saver models only).

f. Carefully slide assembly, with conduit, toward

front of tumbler far enough to permit removal of complete assembly from burner.

g. Remove two screws holding cover to mounting

bracket. Refer to Figure 18

h. Disconnect wires from thermostat.

i. Remove two screws holding thermostat to

mounting bracket. Refer to Figure 18.

JUNCTION

BOX

CONDUIT

NUT

SCREWS

STOVE

HIGH LIMIT

THERMOSTAT

T025SE1A

NEWER MODELS

OLDER MODELS

CABINET

HIGH LIMIT

THERMOSTAT

T024SE1A

Figure 17

70 M411429

Page 69

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

87. CABINET HIGH LIMIT THERMOSTAT (Energy Saver Gas Models)

a. Disconnect electrical service to tumbler. b. Remove chain guard. c. Disconnect wires from thermostat. d. Remove two screws holding thermostat to

vertical duct.

(Non-Energy Saver Gas Models) Refer to Figure 19.

a. Disconnect electrical service to tumbler. b. Remove lint compartment door. c. Remove two screws holding thermostat

mounting bracket to cylinder shroud.

d. Remove two screws holding cover to mounting

bracket.

SCREWS

e. Disconnect two wires from thermostat.

f. Remove two screws holding thermostat to

mounting bracket.

g. To remove thermostat wire assembly.

(1) Repeat steps “d” through “l”, above. (2) Pull wires through bushing in thermostat

mounting bracket and then push wire out through hole in back of lint compartment.

(3) Remove wire cover and junction box cover

from rear of tumbler.

(4) Disconnect wires from inside of junction

box, and pull wires from junction box and wire way.

NOTE: Refer to wiring diagram when reconnecting thermostat wires.

COVER

STOVE

HIGH LIMIT

THERMOSTAT

MOUNTING

BRACKET

Figure 18

M411429 71

SCREWS

TU026-SV

Page 70

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.

THERMOSTAT

W002

88. HIGH LIMIT THERMOSTAT (Electric Models)

a. Unlock and open access door. Remove cover. b. Disconnect wires from thermostat. c. Remove two screws holding thermostat to front

of heater housing and remove thermostat. Refer to Figure 20.

NOTE: Refer to wiring diagram when rewiring thermostat.

MOUNTING

BRACKET

Figure 19

COVER

CLIPS

HIGH LIMIT

THERMOSTAT

SCREW

THERMOSTAT

HOUSING

COVER

TU076-SV

HEATER BOX

ASSEMBLY

GRILL

COVER

T027SE1A

Figure 20

72 M411429

Page 71

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

89. STEAM COILS

WARNING

Allow steam coils and valve to cool down before attempting any service procedures.

a. Shut off inlet and outlet valves and disconnect

flex hoses from steam coils

b. Remove screws holding cover to top of steam

heating unit and remove cover.

c. Remove screws holding steam coils to coil

frame.

W249

d. Remove steam coils by lifting straight up and

out of tumbler.

IMPORTANT: When removing or replacing steam coils, be careful not to damage fins on steam coils.

90. LOADING DOOR ASSEMBLY Refer to Figure 21 and Figure 22.

a. Open loading door. b. While supporting door, remove upper hinge

bolt holding door to hinge bracket.

c. Remove door from hinge bracket.

NOTE: Nylon washer must be in place on lower pin when reinstalling loading door.

ALTERNATE STYLEREGULAR STYLE

BAR

ATTACHING

SCREW

DOOR

HANDLE

BAR

ATTACHING

SCREW

TU030-SV TU031-SV

DOOR

BAR

Figure 21

M411429 73

Page 72

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.

91. LOADING DOOR HINGE

a. Open loading door. b. While supporting door, remove upper hinge

bolt holding door to hinge bracket. c. Remove door from hinge bracket. d. Remove nuts and screws holding hinge to door

frame. Refer to Figure 23.

92. LOADING DOOR HANDLE Refer to Figure 21.

a. Open loading door. b. Remove screws holding door handle to door

frame.

93. FRONT PANEL

a. Remove control panel. b. Unlock, open and remove lint panel. Set aside

to prevent damage.

c. Open loading door, support door and remove

upper hinge bolt holding door to hinge bracket. Refer to Figure 22.

HINGE

BRACKET

HINGE

BOLT

Figure 22

W002

DOOR

ASSEMBLY

T028SE1A

NOTE: Nylon washer must be in place on lower hinge pin when reinstalling door.

d. Remove door from bracket.

DOOR HINGE

e. Support front panel and remove screws (and

three speed nuts — newer models only) holding front panel to tumbler cabinet. Refer to Figure 24.

HINGE

ATTACHING

SCREWS

NOTE: When removing front panel, lower panel slightly to make sure door switch rod clears hole in cabinet.

T029SE1A

Figure 23

74 M411429

Page 73

Section 5 Service Procedures

FRONT PANEL

ATTACHING

SCREWS

(13)

FRONT PANEL

ATTACHING

SCREWS

SPEED

NUTS

NEWER MODELS OLDER MODELS

FRONT PANEL

ATTACHING

SCREWS

T032SE3A

Figure 24

M411429 75

Page 74

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

94. LOADING DOOR SWITCH

a. Remove control panel. b. Disconnect wires from door switch. c. Remove two switch attaching screws and

remove switch. Refer to Figure 25.

NOTE: Refer to wiring diagram when rewiring door switch.

DOOR

SWITCH

SCREWS

95. LOADING DOOR SWITCH ROD Refer to Figure 26.

a. Remove front panel. b. Remove nut, washers and spring clip holding

switch rod to backside of front panel.

c. Apply upward pressure on the welded clip to

allow switch rod to snap free. Refer to Figure 26.

SWITCH

ROD

T034SE1B

SPRING

CLIP

Figure 25

T034SE1A

Figure 26

76 M411429

Page 75

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.

96. AIRFLOW SWITCH

NOTE: Depending on the model, the airflow switch will be found either on the rear of the stove assembly, directly below the wire-way or within the wire way on the rear of the tumbler.

a. Remove wire-way cover plate (older models),

or airflow switch box cover (newer models).

b. Disconnect wires from switch. Refer to

Figure 28.

NOTE: Refer to wiring diagram when rewiring airflow switch.

WIRE-WAY

COVER

W002

c. Remove screw(s) holding switch and mounting

bracket to rear of tumbler (older models); or to switch box (newer models). Refer to Figure 28.

d. Remove two screws holding switch to

mounting bracket.

NOTE: After reinstalling airflow switch and mounting bracket into switch box, adjust switch. Refer to Adjustments Section.

DRIVE

GUARD

DRIVE

GUARD

ATTACHING

SCREW

AIRFLOW

SWITCH

Figure 27

SWITCH

BOX

COVER

TU072-SV

M411429 77

Page 76

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

97. WIRE COVER or WIRE CHANNEL COVER PLATE Refer to Figure 27.

a. Remove single screw holding wire channel

cover plate to wire channel (older models); or remove six screws holding wire cover to rear of tumbler (new models).

b. Remove wire cover or wire channel cover plate.

IMPORTANT: When reinstalling cover, make sure the wires and thermostat sensing tube (if equipped) are not pinched between rear of cabinet and wire cover or between cover plate and channel.

98. DRIVE GUARD

a. Support drive guard and remove screws

holding guard to rear of tumbler. Refer to Figure 27.

b. Reinstall drive guard.

MOUNTING

BRACKET

SWITCH

BOX

SWITCH

LEVER

AIRFLOW

SWITCH

MOUNTING

SCREWS

99. DRIVE BELT Nonreversing Tumblers

a. Remove drive guard. Remove four clips (older

models) or two screws (newer models) holding belt guard assembly to motor bracket. Refer to

Figure 29. Remove belt guard. b. Remove chain. c. Loosen nut on idler housing attaching bolt.

Refer to Figure 30. Drop idler housing to

bottom of slots.

d. Remove lower bolt and nut from guide rail.

Refer to Figure 30. Hinge guide rail out and slip

belt out from under guide rails. e. Slip new belt under guide rail and onto sheave

and motor pulley. Refer to Figure 31.

NOTE: After reinstalling belt and chain, adjust belt, then adjust chain.

Reversing Tumblers

a. Support drive guard and remove the screws

holding it to the back panel of the tumbler.

Leave the belt guard attached to the top of the

drive guard. b. Loosen four capscrews holding motor

mounting bracket to side brackets. Lower

motor and mounting bracket until holding

capscrews bottom in the mounting slots. c. Slip drive belt off of the motor pulley.

d. Disconnect the wires from motor.

e. Slip drive belt off of sheave, and remove drive

belt by working it over the top of the guide rails.

f. Slip the new belt onto the sheave and the motor

pulley. Adjust belt tension.

NEWER MODELS

Figure 28

78 M411429

T037SE1A

Page 77

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.

c. Adjust chain following installation. Refer to

Adjustments section.

101. IDLER HOUSING ASSEMBLY Reversing Tumblers

a. Support drive guard and remove the screws

holding it to the back panel of the tumbler. Leave the belt guard attached to the top of the drive guard.

b. Loosen four capscrews holding motor

mounting bracket to side brackets. Lower motor and mounting bracket until holding capscrews bottom in the mounting slots.

c. Slip drive belt off of the motor pulley.

d. Loosen nut on idler housing attaching bolt and

slide idler housing to top of slotted mounting holes in guide rails. Refer to Figure 31. This will provide slack in drive chain for removal from sprockets.

e. Remove top bolt from guide rail and remove

SCREWS

(Newer Models)

CLIPS

(Older Models)

BELT

GUARD

TU039-SV

Figure 29

guilde rail, idler housing and sheave assembly.

f. After repairing or replacing idler housing

assembly, reinstall chain, belt, chain guard and belt guard.

W002

100. DRIVE CHAIN Nonreversing Tumblers

a. Remove drive guard. b. Loosen jamnut on idler sprocket locking bolt

and move sprocket to the right to relieve chain tension. Refer to Figure 30.

c. Run chain off drive sprocket and lift chain off

cylinder sprocket.

d. Reinstall chain and drive guard.

Reversing Tumblers

a. Repeat steps “a” and “b” of procedure for non-

reversing tumblers, above.

b. Loosen nut on idler housing attaching bolt and

slide idler housing to top of slotted mounting holes in guide rails. Refer to Figure 31. This will provide slack in drive chain for removal from sprockets.

M411429 79

Page 78

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

BELT

BELT/CHAIN NONREVERSING

SHEAVE

LOWER GUIDE

RAIL BOLT

Figure 30

CHAIN

CYLINDER

SPROCKET

IDLER

SPROCKET

JAMNUT

DRIVE

SPROCKET

IDLER

HOUSING

ATTACH ING

BOLT AND

NUT

IDLER RAILS

TU202-PT

102. IDLER SPROCKET Nonreversing Tumblers

a. Remove drive guard. b. Remove drive chain from idler sprocket. c. Remove jam nut and sprocket from bolt. Refer

to Figure 31.

NOTE: After installing chain and sprocket, adjust chain. Refer to Adjustments Section.

d. Reinstall chain and drive guard.

103. SHEAVE

a. Remove drive guard. b. Loosen jam nut on chain idler sprocket and

move idler sprocket to the right. Refer to Figure 31. (Nonreversing tumblers only.)

c. Run chain off drive sprocket.

d. Remove belt tension by loosening idler

capscrews or bolt.

e. While supporting idler housing, remove the

upper and lower bolts, nuts, and lockwashers holding guide rails to trunnion housing and motor bracket. Refer to Figure 31.

f. Remove the sheave, guide rails and idler

housing as an assembly from the rear of the tumbler.

g. Remove snap ring from idler shaft. (Non-

reversing models only).

h. Loosen two setscrews holding sheave to idler

shaft and pull sheave off idler shaft.

i. Remove key from shaft keyway.

IMPORTANT: Reassemble sheave to idler shaft. On nonreversing tumblers, run sheave out until it butts against snap ring. Make sure that shaft key is correctly positioned under setscrew. Tighten setscrew above key first, then tighten other setscrew.

IMPORTANT: Nonreversing Tumblers — Realign motor pulley directly under sheave by loosening drive motor mounting screws and repositioning motor on mounting bracket.

80 M411429

Page 79

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

IMPORTANT: Reversing Tumblers — Realign motor pulley directly over sheave by loosening drive motor mounting screws and repositioning motor on mounting bracket.

104. DRIVE SPROCKET Reversing Tumblers

a. Remove drive guard. b. Loosen nut on idler housing attaching bolt and

slide idler housing to top of slotted mounting holes in guide rails. This will provide slack in drive chain for removal from sprockets. Refer

to Figure 31. c. Remove chain. d. Loosen setscrews holding drive sprocket to

idler shaft and pull sprocket free. e. Remove key from shaft keyway.

f. Reinstall chain and drive guard.

IMPORTANT: Reassemble sprocket to idler shaft. Align sprocket with cylinder sprocket. Make sure shaft key is positioned under one of the sprocket setscrews. Tighten setscrew over key first, then tighten the other setscrew.

105. IDLER SHAFT Refer to Figure 32.

a. Remove idler housing assembly. b. Remove sheave and drive sprocket. c. Remove bolt holding idler housing to guide

rails.

d. Support idler housing assembly and carefully

drive idler shaft from housing using a hammer and a hardwood dowel.

e. Support idler housing assembly and remove

drive bearings from housing using a hammer and a hardwood dowel.

f. Reinstall shaft and bearings.

IMPORTANT: When installing new bearings, apply a film of oil to the bearing cavity surfaces of the housing and the outside diameter of the bearings.

IMPORTANT: If a press is not available to install bearings, tap bearings into housing using a prylin hammer.

g. Reinstall chain guard.

NOTE: After installing sheave, adjust belt and then adjust chain.

106. CYLINDER SPROCKET Nonreversing Tumblers Refer to Figure 30.

a. Remove drive guard. b. Loosen jam nut on idler sprocket and move

sprocket to the right to relieve chain tension.

c. Run chain off idler sprocket and drive sprocket.

d. Lift chain off cylinder sprocket.

NOTE: After installing chain on drive and idler sprockets, adjust chain.

e. Remove pal nut, jam nut, and sprocket from

cylinder shaft.

Reversing Tumblers Refer to Figure 31.

a. Remove drive chain from sprocket. b. Remove three attaching bolts from sprocket

hub.

c. Turn these three bolts into the threaded holes in

the sprocket hub, and “jack” the hub and sprocket apart.

d. Remove hub, sprocket, key and spacer.

NOTE: After installing chain on drive and idler sprockets, adjust chain.

M411429 81

Page 80

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

107. CYLINDER ASSEMBLY

a. Remove control panel. b. Open loading door.

c. While supporting door, remove upper hinge

bolt holding door to hinge bracket. d. Remove door from hinge bracket. e. Unlock, open and remove lint panel. Set aside

to prevent damage.

f. Support front panel and remove screws (and

three speed nuts — newer models only) holding

front panel to tumbler cabinet. Refer to

Figure 24. g. Remove drive chain or belt. h. Remove cylinder sprocket and key.

i. Pull cylinder out through front of cabinet.

NOTE: When removing cylinder out through front of cabinet, spread cabinet slightly so cylinder will clear cabinet sides.

NOTE: After reinstalling chain on cylinder, drive and idler sprockets, adjust chain.

NOTE: After installing cylinder and shaft, adjust cylinder.

j. Reinstall chain guard on tumbler.

MOTOR

BRACKET

MOUNTING

BOLTS

BELT

TRUNNION

HOUSING

ASSEMBLY

CHAIN

MOTOR

PULLEY

CYLINDER

MOTOR

MOUNTING

BOLTS

BUSHING

CYLINDER

SPROCKET

SHEAVE

DRIVE

SPROCKET

T201PE1A

Figure 31

82 M411429

Page 81

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

BOLT

IDLER

HOUSING

(Includes M400039

SNAP RING

CARRIAGE

BOLT

BEARING

LOCKWASHER

108. TRUNNION HOUSING ASSEMBLY

a. Remove cylinder assembly. b. Remove upper guide rail bolt and nut. Refer to

Figure 32. c. Remove four cap screws holding trunnion

housing assembly to rear of cabinet. Refer to

Figure 31. d. Remove four bearing retainer screws holding

the small bearing in housing. Refer to

Figure 33. e. Use a hammer and hardwood dowel to remove

bearings.

WASHER

NUT

KEY

TU039-SV

Figure 32

IDLER

SPROCKET

SLEEVE

IDLER

HOUSING

CONNECTING LINK

(Included with

M401425 CHAIN)

NUT

LOCKWASHER

DRIVE

SPROCKET

DRIVE CHAIN

BEARING

IDLER

SHAFT

LARGE

BEARING

WASHER

IMPORTANT: When installing new bearings, apply a film of oil to the bearing cavity surfaces in the housing and to the outside diameter of the bearings.

IMPORTANT: If a press is not available to install

TRUNNION

HOUSING

SMALL

BEARING

RETAINER

SCREW

TU192-PT

bearings, tap bearings into housing.

f. Reinstall chain guard on tumbler. Refer to

Figure 33

Figure 27.

M411429 83

Page 82

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

109. TRUNNION SHAFT ASSEMBLY Refer to Figure 34.

a. Remove control panel. b. Open loading door.

c. While supporting door, remove upper hinge

bolt holding door to hinge bracket. d. Remove door from hinge bracket. e. Unlock, open and remove lint panel. Set aside

to prevent damage.

f. Support front panel and remove screws (and

three speed nuts — newer models only) holding

front panel to tumbler cabinet. Refer to

Figure 24. g. Remove drive chain. h. Remove cylinder sprocket and key.

i. Pull cylinder out through front of cabinet.

NOTE: When removing cylinder out through front of cabinet, spread cabinet slightly so cylinder will clear cabinet sides.

TAPE

MEASURE

j. Remove the four washers and nuts holding

trunnion shaft assembly to rear of cylinder.

IMPORTANT: When installing trunnion assembly on cylinder, the cylinder and shaft must be aligned. Refer to Figure 34 for an example of how to check for proper alignment of the shaft and cylinder. Measure the distance between the center of the trunnion shaft and the outer rim of the cylinder at the four points shown. If any measurement is lower than the highest point, place shim or shims (M401402) between trunnion channel and cylinder back until the measurement is equal to the highest point.

NOTE: After installing cylinder and shaft, adjust cylinder.

k. Reinstall chain guard on tumbler. Refer to

Figure 27.

TRUNNION

ASSEMBLY

MEASURE AT

FOUR POINTS

CYLINDER

T089SE3C

Figure 34

84 M411429

Page 83

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

110. MOTOR AND FAN ASSEMBLY (Nonreversing)

a. Disconnect wires from motor as follows:

Older models (No quick-disconnect wire harness)

(1) Remove cover plate from motor junction

box and disconnect wires from motor wires. Refer to Figure 35.

(2) Remove conduit nut from inside of motor

junction box. Pull wires from junction box.

Newer models (Quick-disconnect wire harness)

(1) Remove cover plate from rear of motor. (2) Mark four wires and disconnect them from

motor terminals. (3) Loosen clamp screws in box connector. (4) While holding box, turn box connector out

of motor.

NOTE: Refer to wiring diagram when rewiring motor.

b. Remove chain or upper belt. c. Loosen nut on upper guide rail bolt. Refer to

Figure 30.

d. Loosen nut on idler housing attaching bolt and

lower idler housing to bottom of slots. This is to put slack in drive belt, so it can be slipped off the motor pulley without risk of damage.

e. Remove four clips or two screws holding belt

guard to motor bracket and remove belt guard. Refer to Figure 29.

f. Remove nut and washer from lower guide rail

bolt. Refer to Figure 30.

NOTE: After removing belt, replace the lower guide rail bolt. Refer to Figure 36.

g. Slip drive belt off motor pulley. h. Remove the seven fan housing attaching

screws. Refer to Figure 35.

MOTOR

ATTACHING

BOLT

(Both sides)

FAN HOUSING

ATTACHING

SCREWS

(7)

NUT AND

WASHER

CAP

SCREWS

MOTOR

JUNCTION

BOX

PLATE

NUT

AND

WASHER

MOTOR

ATTACHING

BOLT

(Both sides)

TU044-SV

Figure 35

i. Remove the two capscrews and two sets of nuts

and washers holding motor bracket to rear of tumbler cabinet. Refer to Figure 35.

j. Using the guide rails as supports, swing motor

and fan assembly out and away from rear of tumbler. Refer to Figure 36.

k. While supporting motor and fan assembly,

remove the lower guide rail bolt. Refer to Figure 30.

l. Remove four sets of nuts, washers and bolts

holding mounting bracket to motor. Refer to Figure 35.

M411429 85

Page 84

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.

NOTE: After installing motor and fan assembly, adjust belt, then adjust chain (Nonreversing models only.)

111. FAN AND MOTOR ASSEMBLY (Reversing Tumblers)

a. Disconnect wires from motor as follows:

Older models (No quick-disconnect wire harness)

LOWER

GUIDE RAIL

BOLT

(1) Remove cover plate from motor junction

box and disconnect wires from motor wires. Refer to Figure 35.

(2) Remove conduit nut from inside of motor

junction box. Pull wires from junction box.

W002

MOTOR

AND FAN

ASSEMBLY

T045SE3A

Figure 36

m. Remove locknut and jam nut holding fan on

motor shaft. Refer to Figure 37. Pull fan off motor shaft.

NOTE: Fan is keyed to motor shaft and may have to be removed using a puller. Look for a spacer washer at the bottom of the fan keyway. Take care to avoid losing or damaging the spacer washer.

n. Remove spacer washer from motor shaft. Refer

to Figure 37.

o. Loosen two setscrews holding motor pulley to

motor shaft. Refer to Figure 37. Remove motor pulley.

NOTE: A puller may be required to remove pulley from motor shaft.

Newer models (Quick-disconnect wire harness)

(1) Remove cover plate from rear of motor. (2) Mark four wires and disconnect them from

motor terminals. (3) Loosen clamp screws in box connector. (4) While holding box, turn box connector out

of motor.

NOTE: Refer to wiring diagram when rewiring motor.

b. Remove nut and washer from lower guide rail

bolt. Refer to Figure 30.

c. Remove the seven fan housing attaching

screws. Refer to Figure 35.

d. Remove the two capscrews and two sets of nuts

and washers holding motor bracket to rear of tumbler cabinet. Refer to Figure 35.

e. Using the guide rails as supports, swing motor

and fan assembly out and away from rear of tumbler. Refer to Figure 36.

f. While supporting motor and fan assembly,

remove the lower guide rail bolt. Refer to Figure 30.

g. Remove four sets of nuts, washers and bolts

holding mounting bracket to motor. Refer to Figure 35.

86 M411429

Page 85

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.

h. Remove locknut and jam nut holding fan on

motor shaft. Refer to Figure 37. Pull fan off motor shaft.

NOTE: Fan is keyed to motor shaft and may have to be removed using a puller. Look for a spacer washer at the bottom of the fan keyway. Take care to avoid losing or damaging the spacer washer.

i. Remove spacer washer from motor shaft. Refer

to Figure 37.

W002

JAM NUT

SPACER

WASHER

LOCKNUT

FAN HOUSING

COVER

FAN

FAN KEY

MOTOR

PULLEY

KEY

MOTOR

PULLEY

T046SE3A

Figure 37

M411429 87

Page 86

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

112. CYLINDER DRIVE MOTOR (Reversing Tumblers) Refer to Figure 38.

a. Support chain guard and remove the screws

holding it to the back panel of the tumbler. Leave the belt guard attached to the top of the chain guard.

b. Older Models: Loosen four capscrews holding

motor mounting bracket to side brackets. Lower motor and mounting bracket until holding capscrews bottom in the mounting slots. Refer to Figure 38. Newer Models: Loosen locking bolt and back adjusting screw out to loosen belt. Refer to Figure 46.

c. Slip drive belt off of the motor pulley.

d. Disconnect the wire harness from motor.

e. Remove the four capscrews, nuts, lockwashers

and flat washers holding the motor to the mounting bracket.

f. Loosen the setscrews in the motor pulley and

remove pulley by using a suitable puller.

NOTE: Refer to wiring diagram when rewiring the motor.

g. After installing motor, adjust drive belt tension,

and adjust motor position on mounting bracket.

88 M411429

Page 87

Section 5 Service Procedures

SIDE

BRACKET

CYLINDER

MOTOR

PULLEY

BELT

GUARD

MOUNTING

BRACKET

SIDE

BRACKET

TU142-PT

Figure 38

M411429 89

Page 88

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

113. REVERSING CONTROL ELECTRICAL COMPONENTS Refer to Figure 39.

NOTE: All electrical components except the reversing/nonreversing switch are located in the reversing control box on the rear of the tumbler. The reversing/nonreversing switch is mounted on the upper right hand corner of the control panel.

a. Reversing/Nonreversing switch:

(1) Remove control panel. (2) Disconnect wires from switch terminals.

NOTE: Refer to wiring diagram when rewiring switch.

(3) Manual Timer Models: Remove knurled

nut holding switch to front of control panel. MM Models: Compress tabs on switch from rear side of control panel. Slide switch forward out of control panel.

(4) Remove and save hex nut from switch

shaft. Knurled nut is furnished with the switch.

b. Reversing timer assembly:

(1) Remove two attaching screws and cover

from control box.

(2) Disconnect wires from timer motor and

switches, or from solid state reversing timer.

NOTE: Refer to wiring diagram when rewiring timer motor and switches.

(3) Remove two screws holding timer to back

wall of control box.

(4) Models not having solid state reverser:

Remove timer motor and/or switches as necessary for replacement. If timer itself is faulty, replace the complete assembly, including timer motor and switches.

c. Reversing contactor:

(1) Remove two attaching screws and cover

from control box.

(2) Disconnect wires from contactor coil

terminals.

NOTE: Refer to wiring diagram when rewiring reversing contactor.

(3) Remove screws holding contactor to back

wall of control box.

(4) To remove coils for replacement, remove

single screw holding each coil to contactor frame.

(5) If contactor problem is something other

than a defective coil, replace complete contactor assembly.

d. Fan motor contactor:

(1) Remove two attaching screws and cover

from reversing control box (earlier versions); or remove junction box cover (later versions).

(2) Disconnect wires from contactor terminals.

NOTE: Refer to wiring diagram when rewiring fan motor contactor.

(3) Remove two screws holding fan motor

contactor to back wall of reversing control box, or junction box.

e. Transformers (480 volt electrical system

only):

(1) Remove two attaching screws and cover

from reversing control box.

(2) Disconnect leads from transformer

terminals.

NOTE: Refer to wiring diagram when rewiring transformer.

(3) Remove four screws holding transformer

to back wall of reversing control box.

90 M411429

Page 89

Section 5 Service Procedures

SOLID STATE

REVERSING TIMER

TIMER

MOTOR

REVERSING

TIMER

ASSEMBLY

CONTROL

COVER

SWITCH

GROUND

SCREW

BOX

TRANSFORMER

(3 Phase Only)

GROUND

LUG

FAN

CONTACTOR

REVERSING

CONTACTOR

ASSEMBLY

REVERSING CONTROL ASSEMBLY

COIL

(240 Volt)

SCREW

TMB1747S

Figure 39

M411429 91

Page 90

Section 6

Adjustments

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.

114. LEVELING LEGS

NOTE: It is recommended that the front of the tumbler be kept slightly higher than the rear (approximately 1/8 inch, 3.0 mm). This will prevent the clothes, while tumbling, from wearing on the door glass gasket.

a. Check the front to rear level by rotating the

clothes cylinder until one of the cylinder ribs is at the bottom. Place a level on the rib.

b. Check the side to side level by placing a level

on the front and rear of top panel.

c. Front leg adjustment fittings are accessed by

removing lint panel door. Rear adjustment fittings are located on rear corner braces. Adjust legs as needed.

T451I

W002

NOTE: Keep the tumbler as close to the floor as possible. All four legs must rest firmly on the floor so weight of tumbler is evenly distributed. Tumbler must not rock.

d. Replace lint panel.

Figure 40

M411429 93

Page 91

Section 6 Adjustments

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

115. MAIN GAS BURNER AIR INLET SHUTTERS (All Gas Models) Refer to Figure 41.

CAUTION

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.

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 air supplied to the burner while closing the shutter decreases the air supply. Adjust air shutter as follows:

W281

a. Unlock and open the access door.

b. Start the 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 right of the heater section. Too little air is indicated if the flame is yellow, lazy and smoky.

c. To adjust the air inlet shutter, loosen adjusting

screws. The control panel may have to be removed temporarily to loosen adjusting screw.

d. Turn shutter to the right or left (or in or out on

new models) as necessary to obtain desired flame intensity.

e. After shutter is adjusted, tighten locking screw

securely.

f. If the shutter is correctly adjusted, but the flame

pattern is straight up, insufficient air is flowing through the tumbler and airflow switch is improperly set. A flame pattern that flares to the right and left, indicates that no air is flowing through the tumbler.

PROPER

AIRFLOW

T048SE3A

AIR SHUTTER

ADJUSTING SCREWS

94 M411429

INSUFFICIENT

AIRFLOW

AIR SHUTTER

ADJUSTING SCREWS

Figure 41

T047SE3A

NO AIRFLOW

T049SE3A

AIR SHUTTER

ADJUSTING SCREWS

Page 92

Section 6 Adjustments

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

116. AIRFLOW SWITCH Refer to Figure 42.

IMPORTANT: Airflow switch disc must remain closed during operation. If it opens during the drying cycle, insufficient airflow through the tumbler is indicated. 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 malfunctioning.

WARNING

Airflow switch operation may be affected by a clogged lint screen, lack of make-up air, or by obstructions in the vertical recirculation stack, or in the customer installed main or collector ducts. These conditions MUST be checked and necessary corrections made before adjusting airflow switch. Always check airflow at installation. Under no circumstances is the airflow switch to be blocked closed or bypassed.

W277

The airflow switch is set at the factory for proper operation. However, at installation, and following repairs, the airflow switch operation should be checked. The airflow switch operation is controlled by the counterweight position on the shaft. Moving the counterweight changes airflow switch sensitivity. The counterweight should be adjusted so the airflow will force the disc away from the cabinet when the lint panel is opened 11/2 inches (38 mm). Adjust the airflow switch as follows:

a. Load the tumbler with a 50 pound dry cotton

load.

NOTE: Airflow adjustment is much faster with one person opening lint panel in front and another adjusting the counterweight in the rear of tumbler.

b. Start the tumbler. Open the lint panel 1-1/2

inches (38 mm). The airflow disc should move away from the cabinet, opening the switch contacts and shutting off the heat system. This indicates proper operation and proper adjustment.

c. If switch is not opening as described in step “b”,

it should be adjusted so it is MORE sensitive. Depress the spring clip and move counterweight a small amount toward disc. Retest by opening lint panel and continue moving counterweight toward disc until switch operates as described in step “b”.

d. If switch opens BEFORE lint panel is opened

the proper distance, in step “b”, it should be adjusted so it is LESS sensitive. Depress the spring clip and move counterweight a small amount away from the disc. Retest by opening lint panel and continue moving counterweight away from disc until switch operates as described in step “b”.

M411429 95

Page 93

Section 6 Adjustments

AIRFLOW

SWITCH

REAR PANEL OF TUMBLER

SWITCH

ADJUSTING

SCREWS

SCREW

AIRFLOW

SWITCH

MOUNTING

BRACKET

SWITCH

LEVER

VANE

LEVER

ARM

DISC

COUNTER

WEIGHT

Figure 42

SPRING

CLIP

SWITCH

LEVER

SPRING

CLIP

COUNTER

WEIGHT

DISC

TU050-SV

96 M411429

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Section 6 Adjustments

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

117. LOADING DOOR SWITCH Refer to Figure 43.

The door switch should be adjusted so the cylinder stops when door is opened two inches (51 mm), plus or minus 1/4 inch (6 mm). This switch is a normally open switch and is closed when the door is closed. a. Close door and start tumbler, then slowly open

loading door. Cylinder and heat system should shut off when door is open two inches (51 mm) plus or minus 1/4 inch (6 mm).

b. Slowly close loading door. When door is two

inches (51 mm) from being fully closed, the tab on the door should contact the switch rod and depress it enough to close the switch with an audible “click”.

c. If tab does not depress the switch rod enough to

operate the switch, bend tab outward and repeat steps “a” and “b”.

SWITCH

ARM

ADJUSTING

SCREWS

DOOR

SAFETY

SWITCH

118. CYLINDER DOOR STRIKE Refer to Figure 44.

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 acorn nut and turn door strike screw in or out as required. Retighten acorn nut.

DOOR

STRIKE

ACORN

NUT

DOOR

LATCH

T048IE1A

SWITCH

BRACKET

INTERLOCK

ROD

TAB

T249IE1A

Figure 44

Figure 43

M411429 97

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Section 6 Adjustments

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

119. DRIVE BELT TENSION Refer to Figure 46.

Proper tension is when drive belt can be depressed 1/2 inch (12.7 mm) by applying light thumb pressure (approximately 5 pounds) at a point midway between sheave and motor pulley.

Reversing Belt Drive Models: Proper tension is when each cylinder belt can be depressed approximately 3/16 inch (4.77 mm) by applying light thumb pressure (approximately 5 pounds) at a point midway between the sheave and the idler.

CAUTION

Adjusting the drive belt tension WILL AFFECT drive chain tension. You MUST check and readjust the chain tension after adjusting belt tension.

W282

Nonreversing Tumblers (Belt and Chain Drive Models):

a. Remove guard from rear of tumbler. b. Loosen idler housing bolts holding idler

housing to the housing support.

c. Position housing assembly by turning adjusting

bolt until proper belt tension is reached, then retighten idler housing bolts.

d. Replace guard on rear of tumbler.

Reversing Tumblers:

a. Remove guard from rear of tumbler.

b. To adjust cylinder belt tension, loosen idler

housing bolts holding idler housing assembly to the housing support.

c. Position housing assembly by turning adjusting

bolt until proper belt tension is reached, then retighten idler housing bolts.

NOTE: Adjust cylinder belt tension first, then adjust motor to idler belt tension. Refer to Figure 38 for older models. Refer to Figure 46 for newer models.

d. Loosen the locking bolt.

e. Loosen the adjusting nut and use the adjusting

screw to move the motor up or down.

f. Once proper belt tension is reached, retighten

the adjusting nut and locking bolt.

g. Replace the guard on rear of tumbler.

98 M411429

Page 96

NONREVERSING BELT DRIVE

POLY

V-BELT

(Self-adjusting)

Section 6 Adjustments

IDLER

HOUSING

BOLTS

(2)

ADJUSTING

BOLT

DRIVE

V-BELT

GUIDE

RAILS

IDLER

HOUSING

ASSEMBLY

T234IE3B

Figure 45

M411429 99

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Section 6 Adjustments

BELT/BELT REVERSING

DRIVE

BELT

LOCKING

BOLT

ADJUSTING

BOLT

(Not Shown)

IDLER

HOUSING

BOLTS

(2)

ADJUSTING

NUT

ADJUSTING

SCREW

CYLINDER

BELTS

IDLER

HOUSING

ASSEMBLY

T322IE3A

Figure 46

100 M411429

Page 98

Section 6 Adjustments

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

120. DRIVE CHAIN TENSION Refer to Figure 47.

WARNING

To avoid bodily injury, disconnect power to tumbler before performing this operation. To find the proper tension, apply light thumb pressure midway between the cylinder sprocket and the idler sprocket, and adjust until the chain can be depressed approximately 1/2 inch (13 mm).

W279

IMPORTANT: After a tumbler has been in operation over an extended period of time, a “HIGH POINT” will develop on the cylinder drive sprocket from use and wear. Turn the sprocket manually with drive chain in place until this “high point” is at the top center. The “high point” can be found by noticing increased chain tension while slowly rotating the cylinder sprocket manually. The chain must be at the “high point” when making the adjustment. Refer to Figure 47.

Nonreversing Tumblers

a. Remove drive guard, Paragraph 98.

b. To adjust chain tension, loosen jam nut holding

idler sprocket to housing.

c. Move idler sprocket left or right until proper

chain tension is reached, then retighten the jam nut.

d. Check chain tension.

Reversing Tumblers

a. Remove drive guard, Paragraph 98.

b. To adjust chain tension, loosen nut on idler

housing attaching bolt. Refer to Figure 31. Move entire idler housing assembly up or down in the guide rails to change tension.

c. When chain tension is correct, tighten idler

housing attaching bolt. Hold idler housing firmly in position while tightening nut on attaching bolt.

d. Check chain tension after tightening nut on

idler housing attaching bolt. Refer to Figure 47.

M411429 101

Page 99

Section 6 Adjustments

BELT/CHAIN REVERSING

POLY

V-BELT

1/2 INCH (13 mm)

DEFLECTION

MOTOR

PULLEY

CYLINDER

MOTOR

LOCKNUT

ADJUSTING

BOLT

CYLINDER

SPROCKET

SHEAVE

GUIDE

RAILS

IDLER HOUSING

ATTACHING

BOLT AND NUT

Figure 47

CYLINDER

DRIVE CHAIN

1/2 INCH (13 mm)

DEFLECTION

GUIDE

RAIL

IDLER

HOUSING

T201PE3A

102 M411429

Page 100

Section 6 Adjustments

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

121. CYLINDER CLEARANCE

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

the center of the front panel top flange and the cylinder rim. Proper adjustment is when the gap

is 7/16 inch (11 mm). Refer to Figure 48. b. Remove chain guard. c. Loosen the four trunnion housing bolts. Refer

to Figure 49. d. Loosen the locknuts on the trunnion housing

adjusting bolts. Refer to Figure 49.

e. Turn the adjusting bolts in or out as necessary

to obtain proper clearance between cylinder rim and front panel.

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

f. After the cylinder is properly adjusted, tighten

the adjusting bolt locknuts and the four trunnion housing bolts.

g. Install the chain guard removed in step “b”.

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

CYLINDER

RIM

7/16 INCH

(11.113 mm)

GAP

FRONT

PANEL

Figure 48

M411429 103

FRONT PANEL

TOP FLANGE

T057PE3B

Alliance Laundry Systems JCB50CG, JCB50EG, JT37CG, DCB50CG, JT37CGI Service Manual

Table of Contents

Safety Information

Introduction

Model Identification

Troubleshooting

Grounding

Service Procedures

Adjustments