Primus D11, D15, D13 Service Manual

SERVICE MANUAL INDUSTRIAL DRYERS PUBLICATION DATE: 12/03 70284701

D11, 13, 15

Table of Contents

Section 1 – Safety Information

Locating an authorized service person.....................4

Section 2 – Introduction

Model identification.................................................5

Serial plate location..................................................6

Parts ordering information .......................................6

Wiring diagram ........................................................6

How a tumbler works...............................................7

Section 3 – Troubleshooting

1. Tumbler does not start.......................................9

2. Motor does not start...........................................9

3. Motor overload protector cycles repeatedly....10

4. Motor runs but cylinder does not turn.............10

5. Motor does not stop.........................................10

6. Burner does not ignite .....................................11

7. Burner ignites and goes out repeatedly ...........12

8. Burner does not shut off ..................................12

9. Clothes do not dry ...........................................13

10. Tumbler overheating .......................................13

11. Burners not burning properly ..........................14

12. Loading door opens during operation .............14

Section 4 – Grounding

Grounding Instructions ..........................................15

Section 5 – Service Procedures

13. Loading door assembly ...................................17

14. Door hinge.......................................................17

15. Door handle .....................................................17

16. Front panel.......................................................18

17. Door switch .....................................................19

18. European door switch......................................19

19. Control and coin drop assembly......................20

20. Lint panel.........................................................20

21. Lint screen .......................................................20

22. Lint panel switch .............................................21

23. Junction box/control box.................................21

24. Fuse and fuse holder assembly........................21

25. Cylinder rollers................................................22

26. Roller shaft ......................................................22

27. Cylinder...........................................................23

28. Cylinder belt....................................................24

29. Rear cylinder seal............................................25

30. Roller support and baffle assembly.................26

31. Airflow switch.................................................27

32. Stove high limit thermostat .............................27

33. Complete gas valve assembly .........................28

34. Burner tube assembly......................................30

35. Viewer window ...............................................30

36. Igniter assembly ..............................................30

37. Electronic ignition control...............................31

38. Thermistor .......................................................32

39. Cabinet thermostat...........................................32

40. Heater element.................................................33

41. Contactors........................................................34

42. Terminal block ................................................34

43. Motor relay......................................................34

44. Transformer.....................................................34

45. Ignition control................................................34

46. Steam coil........................................................35

47. Steam solenoid valve.......................................35

48. Drive belt.........................................................36

49. Fan...................................................................37

50. Fan motor assembly ........................................37

51. Drive motor .....................................................38

Section 6 – Adjustments

52. Leveling legs ...................................................39

53. Airflow switch adjustment ..............................39

54. Loading door switch........................................40

55. Loading door strike .........................................41

Section 7 – Electronic Control Troubleshooting

56. Theory of operation of instant

electronic ignition............................................43

57. Cannot perform infrared (IR)

communication................................................44

58. Coins ignored when entered............................45

59. Control display – Door open light “on” ..........46

60. Control display – “Door” error on 25, 30, stacked 30 and 35 pound tumblers with 24 volt

EDC controls...................................................47

61. Control Display – No visible display – OPL

microprocessor models....................................48

62. Control display – No visible display

– Power on.......................................................49

70284701 1

(continued)

63. Will not start – Electric – Manual timer..........50

64. Will not start – Electric – Rotary coin drop ....51

65. Will not start – Gas – Manual timer................53

66. Will not start – Gas – Rotary coin drop...........54

67. Will not start – Steam – Manual timer ............56

68. Will not start – Steam – Rotary coin drop.......57

69. Will not start/continue running

– EDC control..................................................59

70. Will not start/continue running – OPL

microprocessor control....................................62

71. Will not run – Electric – Manual timer ...........65

72. Will not run – Electric – Rotary coin drop......68

73. Will not run – Gas – Manual timer..................71

74. Will not run – Gas – Rotary coin drop ............73

75. Will not run – Steam – Manual timer..............75

76. Will not run – Steam – Rotary coin drop ........77

77. Will not heat – Electric – Manual timer..........79

78. Will not heat – Electric....................................81

79. Will not heat – Electric – Rotary coin drop

(With and without time delay board) ..............83

80. Will not heat – Electric/gas – OPL

microprocessor ................................................85

81. Will not heat – Gas – EDC models .................88

82. Will not heat – Gas – Manual timer ................90

83. Will not heat – Gas – Rotary coin drop...........92

84. Will not heat – Steam – EDC models..............94

85. Will not heat – Steam – Manual timer ............96

86. Will not heat – Steam

– OPL microprocessor.....................................98

87. Will not heat – Steam – Rotary coin drop.....101

Section 9 – NetMaster Troubleshooting

97. No IR communication ...................................129

98. Coins ignored when entered..........................130

99. Control has no display...................................131

100. Door open indicator.......................................134

101. Motor will not start/run .................................138

102. Unit will not heat (Gas).................................144

103. Unit will not heat (Steam) .............................148

104. Unit will not heat (Electric)...........................152

Section 8 – Micro Display Control Troubleshooting

88. Coins ignored when entered..........................103

89. Control has no display...................................104

90. Door open indicator.......................................106

91. Motor will not start/run .................................108

92. Unit will not heat (Gas).................................112

93. Unit will not heat (Gas).................................114

94. Unit will not heat (Steam) .............................115

95. Unit will not heat (Electric)...........................118

96. Error codes ....................................................121

Gas models...........................................................122

Schematic..........................................................122

Connection diagram..........................................123

Steam models.......................................................124

Schematic..........................................................124

Connection diagram..........................................125

Electric models.....................................................126

Schematic..........................................................126

Connection diagram..........................................127

2 70284701

Section 1

Safety Information

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

DANGER

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

WARNING

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

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

WARNING

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

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

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

W006R2

CAUTION

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

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

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

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

70284701 3

Section 1 Safety Information

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

WARNING

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

• Disconnect electric power to the tumbler before servicing.

• Never start the tumbler with any guards/ panels removed.

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

W240

WARNING

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

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

Locating an authorized service person

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

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

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

W007

CAUTION

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

W008

4 70284701

Section 2

Introduction

Model identification

Information in this manual is applicable to these models:

Gas Steam Electric

25 Pound

(220 Liter)

30 Pound

(270 Liter)

35 Pound

(350 Liter)

HA025L HA025N HT025L HT025N HU025L HU025N LT025L LT025N PA025L

HA030L HA030N HT030L HT030N HU030L HU030N LT030L LT030N LU030L LU030N

AT035L AT035N HA035L HA035N HT035L HT035N HU035L HU035N LT035L LT035N

PA025N PT025L PT025N PU025L PU025N SA025L SA025N ST025L ST025N

PA030L PA030N PT030L PT030N PU030L PU030N SA030L SA030N ST030L

LU035L LU035N PA035L PA035N PT035L PT035N PU035L PU035N SA035L SA035N

SU025L SU025N UA025L UA025N UT025L UT025N UU025L UU025N

ST030N SU030L SU030N UA030L UA030N UT030L UT030N UU030L UU030N

ST035L ST035N SU035L SU035N UA035L UA035N UT035L UT035N UU035L UU035N

HT025S HU025S PT025S PU025S

HT030S HU030S PT030S PU030S

AT035S HT035S HU035S PT035S PU035S

ST025S SU025S UT025S UU025S

ST030S SU030S UT030S UU030S

ST035S SU035S UT035S UU035S

HT025E HU025E PT025E PU025E

HT030E HU030E LU030E PT030E PU030E

AT035E HT035E HU035E LU035E PT035E PU035E

ST025E SU025E UT025E UU025E

ST030E SU030E UT030E UU030E

ST035E SU035E UT035E UU035E

Includes models with the following control suffixes (7th and 8th characters):

BC – basic electronic, coin EC – EDC electronic coin NY – NetMaster card ready BL – basic electronic, central pay EX – EDC coin ready OM – OPL micro BX – basic electronic, prep for coin EY – EDC card ready ZC – NetMaster coin network BY – basic electronic, prep for card MT – manual timer ZR – NetMaster card network CD – rotary coin drop NC – NetMaster coin ZX – NetMaster coin ready network CX – prep for coin drop NR – NetMaster card ZY – NetMaster card ready network CY – prep for card NX – NetMaster coin ready

70284701 5

Section 2 Introduction

Serial plate location

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

ANS 72152 CLOTHES DRYER.

MODEL NO:

SERIAL NO:

V-/ HERTZ/ PHASE

AMPS, WIRES + GROUND

TOTAL kW, MOTOR kW

REQ'D CIRCUIT BREAKER: AMPS

FAN OUTPUT: @MAX "WC STATIC PRESSURE

EQUIPPED FOR: GAS@ "WC MANIFOLD PRESS.

MIN SUPPLY PRESSURE:

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

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

MODEL NO:

SERIAL NO:

MAX SUPPLY

"WC. "WC.

PRESSURE:

VOL II

TESTED FOR NATURAL & LIQUID PETROLEUM GASSES

AMPLFIEDRER

CGA 72

Parts ordering information

If replacement parts are required, contact the source from whom you purchased the unit 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.

TMB1823N

Wiring diagram

The wiring diagram is located inside the contactor or junction box.

6 70284701

How a tumbler works

Section 2 Introduction

A tumbler uses heated air to dry loads of laundry.

1

2

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

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

① When the motor is started, the exhaust fan pulls

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

③ The air then passes through the lint filter, exhaust

fan, and is vented to the outdoors.

3

T001CE3A

70284701 7

Section 2 Introduction

Notes

8 70284701

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 wiring diagram for aid in testing tumbler components.

1. TUMBLER DOES NOT START

POSSIBLE CAUSE TO CORRECT

Inoperative motor relay. • Test relay and replace if necessary. Loading door is open. • Close loading door completely. Drying timer is in an off position. (Manual Timer

Models) Incorrect amount of coins inserted into coin drop. • Check that proper amount of coins are inserted. Inoperative coin drop. • Test coin drop and replaced if inoperative. PUSH-TO-START button not properly activated.

(Manual Timer Models) Electrical power off or circuit breaker or fuse

blown. Lint panel open. • Close and lock lint panel. Blown fuse on tumbler. • Check fuse (in junction box) and replace if necessary.

• Turn drying timer on.

• Press and hold in push-to-start button for three seconds.

• Check power supply, or replace fuses.

W002

2. MOTOR DOES NOT START

POSSIBLE CAUSE TO CORRECT

Electrical power off or circuit breaker fuse blown. • Check power supply, or replace fuses. Loading door switch or lint panel switch not closed

or inoperative switch. Door switch improperly adjusted. • Refer to Adjustments Section for door switch adjustment. Start circuit not complete. • Press and hold in push-to-start button for three seconds. Inoperative motor. • Have motor tested and replace if inoperative. Broken, loose, or incorrect wiring. • Refer to wiring diagram. Fan or fan motor binding. • Replace fan or motor assembly. Cylinder or cylinder motor binding. • Replace cylinder, bearing, rollers, or motor assembly. Inoperative transformer. • Test and replace if necessary. Inoperative motor relay. • Test relay and replace if inoperative. Inoperative airflow switch. (Only on manual timer

and rotary coin drop.)

70284701 9

• Close door or test switch and replace if inoperative.

• Test switch, replace or adjust as required.

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.

3. MOTOR OVERLOAD PROTECTOR CYCLES REPEATEDLY

POSSIBLE CAUSE TO CORRECT

Incorrect voltage • Refer to Installation Manual for electrical requirements. Clothes load is too large. • Remove part of load. Clothes cylinder is binding. • Check cylinder for binding. Inadequate wiring. • Electrician should verify that wiring and voltage is

adequate.

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

requirements. Lint buildup around tumbler, poor maintenance. • Clean lint accumulation on and around the motors. Broken, loose or incorrect wiring. • Refer to wiring diagram.

W002

4. MOTOR RUNS BUT CYLINDER DOES NOT TURN

POSSIBLE CAUSE TO CORRECT

Broken cylinder belt. • Replace cylinder belt. Cylinder is binding. • Check cylinder for binding.

5. MOTOR DOES NOT STOP

POSSIBLE CAUSE TO CORRECT

Inoperative door switch. • Test switch and replace if inoperative. Inoperative coin drop. • Test coin drop and replace if inoperative. Incorrect wiring. • Refer to wiring diagram. Electronic control inoperative. • Replace electronic control. Inoperative motor relay. • Test relay and replace if inoperative.

10 70284701

Section 3 Troubleshooting

WARNING

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

• Disconnect electric power to the tumbler before servicing.

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

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

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

6. BURNER DOES NOT IGNITE

POSSIBLE CAUSE TO CORRECT

Improper or inadequate exhaust system. • Refer to Installation Manual for exhaust system

requirements.

Drying selector in the “Cool Down” or “No Heat”

• Add dry time or select heat.

portion of cycle. Inoperative cabinet thermostat or stove. • Test thermostats and replace if inoperative. Insufficient gas supply. • Open partially closed gas shut-off valve, or correct low

gas pressure. Check manifold pressure and adjust to pressure specified on serial plate. If pressure cannot be obtained, have your local gas company check main 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 correct orifices.

Lint buildup. • Clean lint compartment. Check damper for lint

accumulation. Check ductwork for lint build-up.

Inadequate duct work and make-up air. • Refer to Installation Manual to ensure that ductwork and

make-up air openings are sized accurately.

Inoperative airflow switch. • Test switch and replace if inoperative. Airflow switch out of adjustment. • Refer to Adjustments Section for airflow switch

adjustment.

Broken, loose, or incorrect wiring. • Refer to wiring diagram. Improper igniter to burner tab clearances. • Set gap as described in Service Procedures Section. Valve coils inoperative. • Check valve coils and replace if necessary. Gas shut-off valve in the closed position. • Open shut-off valve. Ground wire from Instant Electronic Ignition (IEI)

• Connect ground wire to ground terminal.

board not connected to ground terminal. Inoperative IEI control. • Replace IEI control. Inoperative motor switch. • Replace motor. Inoperative microprocessor, accumulator switch

• Test and replace as needed.

(rotary coin drop) or C1 relay (timer models). Instant Electronic Ignition (IEI) control in safety

lockout.

• Reset IEI control by opening and closing loading door. (Non-European models only)

W002

70284701 11

• Reset IEI by pressing reset button on back of unit. (European models only)

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.

7. BURNER IGNITES AND GOES OUT REPEATEDLY

POSSIBLE CAUSE TO CORRECT

Insufficient gas pressure. • Check gas supply and pressure. Inoperative cabinet or stove thermostat. • Test thermostat and replace if inoperative. Improper or inadequate exhaust system. • Refer to Installation Manual for exhaust systems

requirements.

Improper 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 correct orifices.

Broken, loose or incorrect wiring. • Refer to wiring diagram. Excessive igniter to burner clearance. • Set gap as described in Service Procedures Section. Inadequate make-up air. • Refer to Installation Manual for make-up air

requirements.

W002

8. BURNER DOES NOT SHUT OFF

POSSIBLE CAUSE TO CORRECT

Impurities on gas valve seat, preventing valve from

• Replace gas valve.

closing. Incorrect wiring. • Refer to wiring diagram.

12 70284701

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.

9. CLOTHES DO NOT DRY

POSSIBLE CAUSE TO CORRECT

Not enough heating time allocated for the load. • Start cycle again with enough time to dry load. Burner does not ignite. • Refer to Paragraph 6. Too much water in articles being dried. • Remove excess water. Clothes load too large. • Remove part of load. Maximum load is 25 pound dry

weight (cotton load) for 25 pound Tumbler, etc.

Improper or inadequate exhaust system. • Refer to Installation Manual for exhaust system

requirements. Burner ignites and goes out repeatedly. • Refer to Paragraph 7. Drying selector improperly set. • Set selector for higher setting. Incorrect voltage. • Refer to Installation Manual for electrical requirements. Inadequate make-up air. • Refer to Installation Manual for make-up air

requirements. Exhaust duct to the outside blocked. • Clean duct to remove blockage. Clogged lint screen. • Clean lint screen. Inoperative thermistor • Replace thermistor. Exhaust damper binding. • Adjust damper so it turns freely.

W002

10. TUMBLER OVERHEATING

POSSIBLE CAUSE TO CORRECT

Incorrect main burner orifices. • Obtain and install correct orifices. Gas pressure too high or low. • Adjust gas pressure as specified on serial plate. Inadequate make-up air. • Refer to Installation Manual for make-up air

Lint buildup. • Clean lint compartment. Check damper for lint

Restricted or inadequate exhaust system. • Remove obstruction or lint build up from exhaust

Inoperative thermistor. • Check wiring to ensure thermistor is connected. Replace

Exhaust damper binding. • Adjust damper so it turns freely.

70284701 13

requirements.

accumulation. Check ductwork for lint build-up.

ductwork. Refer to Installation Manual for exhaust

system requirements.

thermistor if necessary.

Section 3 Troubleshooting

WARNING

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

• Disconnect electric power to the tumbler before servicing.

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

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

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

11. BURNERS NOT BURNING PROPERLY

POSSIBLE CAUSE TO CORRECT

Dirt in burner. • Remove burner and blow out the dirt. Gas pressure too high or low. • Check serial plate on back of tumbler for correct gas

pressure.

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

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

Restricted or blocked exhaust duct. • Disassemble and clean exhaust system. Inadequate make-up air. • Refer to Installation Manual for make-up air

requirements.

W002

12. LOADING DOOR OPENS DURING OPERATION

POSSIBLE CAUSE TO CORRECT

Tumbler improperly leveled. • Refer to Adjustments Section for leveling leg adjustment. Excessive load in tumbler. • Remove part of load and restart tumbler. Incorrect loading door strike adjustment. • Refer to Adjustments Section for strike adjustment.

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

14 70284701

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

Grounding Instructions

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

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

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.

IMPORTANT: To avoid a short to ground on the control transformer line, or voltage output that could run the control or cause it to run on a reduced voltage; DO NOT connect a “High Leg” or “Stinger Leg” to a single phase machine with an electrical supply coming from a three phase service. A “High Leg” or “Stinger Leg” on three phase machines should be connected to L3.

70284701 15

Section 4 Grounding

Notes

16 70284701

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: When reference is made to the left or right hand direction in this manual, it is from the service person’s position facing the front of the tumbler.

13. LOADING DOOR ASSEMBLY

Refer to Figure 1. a. Open loading door. b. While supporting door, remove two screws

from hinge cam at top of door and slide door out of the bottom hinge.

c. Remove door.

HINGE CAM

SCREW

14. DOOR HINGE

Refer to Figures 1 and 2. a. Open loading door. b. While supporting door, remove two screws

from hinge cam at top of door and slide door out

of the bottom hinge. c. Remove door. d. Remove nuts and screws holding hinge to door

frame. Refer to Figure 2.

15. DOOR HANDLE

Refer to Figure 2. a. Open loading door. b. Remove screws holding door handle to door.

DOOR FRAME

DOOR

FRAME

NUT

DOOR

HANDLE

SCREW

DOOR

HINGE LUG

Figure 1

70284701 17

T252SE1B

HINGE

TMB1821S

DOOR

HANDLE

Figure 2

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

16. FRONT PANEL

Refer to Figure 3. a. Unlock and remove top access panel. b. Unlock and remove lint panel. c. Remove two screws at the loading door hinge

lug. Refer to Figure 1.

d. Remove eight screws holding front panel to

cabinet, leaving one screw on the top.

TOP

ACCESS

PANEL

SCREW

e. Support front panel and pull bottom of panel

away from the tumblers far enough to disconnect door switch wires.

f. Remove remaining screw at top.

g. Remove front panel.

NOTE: Ensure front baffle gaskets are in place. Refer to Figure 21.

NOTE: Refer to wiring diagram when rewiring door switch.

1

S E L E TE

C T

M

P

2

IN S

E R

C

T

O

IN

3

P U S H STA RT

H IG H TE M P

STA

25

M ED

RT

C

T E M P

L O W TE M P

NO H E A T

18 70284701

FRONT PANEL

DOOR

SWITCH

LINT

PANEL

TMB1752S

Figure 3

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

17. DOOR SWITCH

Refer to Figure 4. a. Remove two screws from loading door hinge

lug. Refer to Figure 1.

b. Remove screws from bottom of front panel.

Refer to Figure 3. c. Tilt front panel out and away from tumbler. d. Disconnect wires to door switch.

NOTE: Refer to wiring diagram when rewiring door switch.

e. Press switch tabs in and push switch out

through front panel.

WARNING

To reduce the risk of serious injury the door switch MUST be reinstalled after service is complete.

W241

18. EUROPEAN DOOR SWITCH

Refer to Figure 5.

NOTE: European Models prior to Serial Number 0208002174 are equipped with a second door switch.

a. Remove two screws from the loading door

hinge lug. Refer to Figure 1.

b. Remove screws from top and sides of front

panel and loosen screws at bottom of front panel. Refer to Figure 3.

c. Tilt front panel out and away from tumbler only

far enough to permit disconnecting wires from door switch.

NOTE: Refer to wiring diagram when rewiring door switch.

d. Remove two screws and nuts holding door

switch to bracket on inside of front panel.

EU DOOR

SWITCH

SCREWS

DOOR

SWITCH

Figure 4

70284701 19

SWITCH

TABS

T258SE1A

T386I

Figure 5

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

19. CONTROL AND COIN DROP ASSEMBLY

Refer to Figure 6. a. Unlock top access panel over control and

remove. Refer to Figure 3. b. Remove two screws from control door. c. Swing out control. d. Push up on control until top hinge clears slot. e. Disconnect wire harness from cabinet harness.

f. Remove control and place in a clean dry

location where it cannot be damaged.

IMPORTANT: Refer to wiring diagram when rewiring control.

CONTROL

DOOR

SCREWS

1

SELECT TEMP

2

INSERT COIN

3

PUSH START

H IG H TE M

P

25

STA

C

M E

RT

D T E M

P

L O W T E M P

N O H E A T

20. LINT PANEL Coin

Unlock panel and remove. Refer to Figure 6.

OPL

Pull panel down from top. Refer to Figure 6.

CLIP

SCREW

LINT

SCREEN

Figure 7

TMB1819S

COIN

VAU LT

(Obtain

Locally)

LINT

PA NE L

LINT

PANEL

LOCK

Figure 6

20 70284701

TMB1753S

21. LINT SCREEN

Refer to Figure 7. a. Unlock and remove lint panel. Refer to

Figure 6.

b. Apply pressure on top of screen to release

screen from clip.

c. Remove screen.

TO REPLACE SCREEN

a. Drop bottom of screen between lugs on bottom.

Refer to Figure 7.

b. Secure top of screen behind clip.

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

22. LINT PANEL SWITCH

Refer to Figure 8. a. Remove front panel. Refer to Figure 3. b. Disconnect wires from lint panel switch. c. Remove two screws holding switch to switch

mounting bracket.

NOTE: When installing switch, switch lever must point toward rear of tumbler.

LINT

PANEL

SWITCH

NUT

SCREW

LINT PANEL

SWITCH

BRACKET

TMB1851S

Figure 8

23. JUNCTION BOX/CONTROL BOX

a. Remove four screws holding control tray cover

in place. Refer to Figure 21.

b. Remove control tray cover.

24. FUSE AND FUSE HOLDER ASSEMBLY

Refer to Figures 9 and 10.

c. Disconnect wires from fuse holder.

NOTE: Refer to wiring diagram when rewiring fuse.

d. Remove retaining nut holding fuse holder

assembly to junction box and remove assembly.

FUSE

HOLDERS

Figure 9

RETAINING

FUSE

CAP

Figure 10

T277SE1A

NUT

FUSE

HOLDER

T259SE1A

NOTE: Fuse holder is located in the junction box at the rear of the machine. There is a fuse access door in the junction box cover for changing fuses.

a. Remove junction box cover. Refer to

Paragraph 23.

b. Turn fuse cap counterclockwise to remove fuse.

70284701 21

Section 5 Service Procedures

WARNING

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

• Disconnect electric power to the tumbler before servicing.

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

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

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

W002

25. CYLINDER ROLLERS

Refer to Figure 11. a. Unlock and remove lint panel. Refer to

Figure 8. b. Remove top access panel. c. Remove front panel. d. Remove nuts from end of roller shafts. Refer to

Figure 11.

e. Lift cylinder slightly and remove rollers from

shafts. Refer to Figure 11.

ROLLER

SHAFT

CYLINDER

ROLLER

NUT

26. ROLLER SHAFT

Refer to Figure 11. a. Unlock and remove lint panel. Refer to

Figure 8. b. Remove front panel. Refer to Figure 3. c. Remove cylinder rollers. Refer to

Paragraph 25. d. Remove nuts from back of roller shaft. e. Slide shaft back out of air duct roller support

assembly.

NUT

22 70284701

Figure 11

AIR DUCT

ROLLER SUPPORT

ASSEMBLY

T262SE3A

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.

27. CYLINDER

a. Unlock and remove lint panel. Refer to

Paragraph 20. b. Remove front panel. Refer to Paragraph 16. c. Remove palnut, jamnut and washer from

cylinder shaft. Refer to Figure 12. d. Remove drive access cover at rear of tumbler.

Refer to Figure 26. e. Pivot motor upward and run belt off motor

pulley and carefully lower motor. Refer to

Figure 26.

f. Pull cylinder out through front of cabinet.

.

W002

PALNUT

JAMNUT

Figure 12

70284701 23

WASHER

T261SE1A

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

28. CYLINDER BELT

Refer to Figure 13. a. Unlock and remove lint panel. b. Remove front panel. c. Remove palnut, jamnut and washer from

trunnion shaft.

d. Remove drive belt service door at rear of

tumbler.

WASHER

e. Raise motor assembly and run belt off motor

pulley.

f. Pull cylinder out through front of cabinet.

NOTE: Before reassembling cylinder, clean interior of cabinet, checking to make sure all tools have been removed.

BELT

MOTOR

PULLEY

CYLINDER

IDLER

PULLEY

SPRING

24 70284701

DRIVE

ACCESS

COVER

MOTOR

ASSEMBLY

TMB1847S

Figure 13

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

29. REAR CYLINDER SEAL

Refer to Figure 14. a. Remove cylinder assembly. Refer to

Paragraph 27. b. Remove seal from seal support on rear panel. c. Degrease area where new seal is to be placed.

Scrape any remaining adhesive remnants from seal support.

d. Apply generous amount of adhesive into seal

support.

REAR

CYLINDER

SEAL

SUPPORT

e. Carefully install seal into adhesive surface.

Apply pressure until glue is able to support seal and hold it in position.

WARNING

For personal safety use degreaser/solvent only in a well ventilated area away from any open flames or sources of ignition.

WASHER

PALNUT

JAM NUT

BEARING

W242

TRUNNION

ASSEMBLY

70284701 25

Figure 14

CYLINDER

ASSEMBLY

CENTER

CYLINDER

SEAL

TMB1791S

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

30. ROLLER SUPPORT AND BAFFLE ASSEMBLY

Refer to Figure 15. a. Remove cylinder assembly. Refer to

Paragraph 27. b. Remove center partition seal. c. Remove screws holding roller support to

cabinet.

BAFFLE

GASKET

d. Remove screws holding lower baffles to center

partition.

e. Remove lower baffles.

f. Remove screws holding roller support to center

partition.

g. Remove roller support.

ROLLERS

26 70284701

ROLLER

SUPPORT

GASKET

BAFFLE

CENTER

PARTITION

SEAL

CENTER

PARTITION

TMB1969P

Figure 15

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

SCREW

AIRFLOW

SWITCH PLATE

SCREW

AIRFLOW

SWITCH

AIRFLOW

VANE

31. AIRFLOW SWITCH

Refer to Figure 16. a. Remove two screws on airflow switch guard

and remove guard.

b. Disconnect wires from switch.

NOTE: Refer to wiring diagram when rewiring switch.

BRACKET

TWIN

SPEED NUT

Figure 16

NOTE: Refer to wiring diagram when rewiring thermostat.

TMB1846S

32. STOVE HIGH LIMIT THERMOSTAT

Refer to Figure 17. a. Remove cover screws holding gas valve cover

to stove and remove cover.

b. Disconnect wires from stove limit thermostat.

c. Remove two screws and one speed nut holding

switch to mounting bracket.

70284701 27

c. Remove screws holding stove limit thermostat

to stove.

Section 5 Service Procedures

S

75%

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

STOVE

LIMIT

THERMOSTAT

ATTACHING

SCREW

STOVE

Figure 17

TMB35S

TMB35

33. COMPLETE GAS VALVE ASSEMBLY

Refer to Figure 18. a. Remove gas valve cover. b. Disconnect gas valve wire connections. c. Disconnect gas valve pipe union holding gas

shut-off valve to gas valve nipple.

d. Remove screws holding gas valve to gas valve

bracket and remove valve.

IMPORTANT: When reinstalling gas valve, purge air and sediment from gas service line before connecting to tumbler. Purge remaining air until odor of gas is detected, then tighten connection. 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

28 70284701

Section 5 Service Procedures

GAS

VALV E

GAS

VALV E

BRACKET

MANUAL

SHUT-OFF

VALV E

CLOSE NIPPLE

UNION

ADAPTER

NIPPLE

ELBOW

TMB1942P

PIPE

GAS

VALVE

GAS VALVE

BRACKET

RIVET

GAS VALVE

COVER

ORIFICE HOLDER

BRACKET

TMB1973P

European and Australian Models Non-European and Non-Australian Models

Figure 18

70284701 29

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

34. BURNER TUBE ASSEMBLY

Refer to Figure 19. a. Remove complete gas valve assembly. Refer to

Paragraph 33.

b. Remove stove guard screws holding stove

guard to bottom of stove and remove guard. c. Remove screws holding burner to stove. d. Remove burner by sliding burner tube away

from gas valve end of stove. e. Pull down on gas valve end of burner tube and

remove from bottom of stove.

BURNER

TUBE

ASSEMBLY

IGNITER SCREW

36. IGNITER ASSEMBLY

a. Remove screws holding gas valve cover to

stove and remove cover. Refer to Paragraph 33.

b. Remove two screws holding igniter to stove

and remove igniter.

IMPORTANT: When reinstalling igniter to burner, gap should be .110 inch - .140 inch (2.79 - 3.55 mm). Refer to Figure 20.

IGNITER

ASSEMBLY

GAP

.110 inch - .140 inch

(2.79 - 3.55 mm)

IGNITER

VIEWER

WINDOW

STOVE GUARD

STOVE

GUARD

SCREWS

Figure 19

35. VIEWER WINDOW

Refer to Figure 19. a. Loosen screw in upper left corner. b. Remove lower screw. c. Turn plate counterclockwise in order to view

burner tube and igniter gap.

30 70284701

SCREW

TMB36S

BURNER

TUBE

Figure 20

T276SE1C

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.

37. ELECTRONIC IGNITION CONTROL

Refer to Figure 21. a. Remove screws holding control tray cover to

control box and remove cover. b. Disconnect wire harness. c. Remove high tension lead. d. Remove screws holding ignition control to

control box and remove ignition control.

W002

IGNITION

CONTROL

SCREW

ELECTRONIC

IGNITION

CONTROL

HIGH

VOLTAGE

LEAD

TRANSFORMER

70284701 31

CONTROL

BOX COVER

T273SE3A

Figure 21

Section 5 Service Procedures

WARNING

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

• Disconnect electric power to the tumbler before servicing.

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

• Close steam valve to steam tumbler before servicing.

• Never start the tumbler with any guards/panels removed.

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

W002

38. THERMISTOR

Refer to Figure 22. a. Remove screws holding guard to tumbler and

remove cover.

b. Remove screw from belt service door and

remove door. c. Disconnect wires to thermistor. d. Unscrew thermistor by turning

counterclockwise.

NOTE: Do not turn thermistor by spade terminals.

IMPORTANT: Do not damage thermistor during removal.

39. CABINET THERMOSTAT

Refer to Figure 22. a. Remove screws holding guard to tumbler and

remove guard.

b. Remove screw from belt service door and

remove door. c. Disconnect wires from cabinet thermostat. d. Remove screws holding cabinet thermostat to

cabinet and remove cabinet thermostat.

BELT

SERVICE DOOR

THERMISTOR

CABINET HIGH

LIMIT THERMOSTAT

32 70284701

TMB37S

VIEW FROM INSIDE TUMBLER

Figure 22

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

40. HEATER ELEMENT (Electric Models)

Refer to Figure 23. a. Remove three screws holding connector cover

in place. Remove guard.

b. Remove nuts attaching element wires and

jumper bars to elements. Disconnect element wires.

ELEMENT

ATTACHING

SCREW

NUT

JUMPER

BAR

c. Remove six screws holding element guard to

back of heater box. Remove guard.

d. Remove element attaching screw holding

element to the left side of stove (viewed from rear of tumbler).

e. Slide element to right and pull left side of

element down and out to the left to remove element (viewed from rear of tumbler).

CONNECTOR

COVER

ELEMENT

GUARD

ATTACHING

SCREW

70284701 33

HEATER

ELEMENT

TMB1757S

Figure 23

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

41. CONTACTORS

Refer to Figure 24. a. Remove screws holding cover and remove

cover.

b. Loosen terminal screws and disconnect all

wires from contactor.

c. Remove four contactor attaching screws and

remove contactor.

NOTE: Refer to wiring diagram when rewiring contactor.

42. TERMINAL BLOCK

Refer to Figure 24. a. Remove screws holding cover and remove

cover.

b. Loosen screws and disconnect all wires from

terminal block.

c. Remove attaching screws and remove terminal

block.

43. MOTOR RELAY

Refer to Figure 24. a. Remove screws holding cover and remove

cover.

b. Loosen screws and disconnect all wires from

motor relay.

c. Remove attaching screws and remove motor

relay.

44. TRANSFORMER

Refer to Figure 24. a. Remove screws holding cover and remove

cover.

b. Loosen screws and disconnect all wires from

transformer.

c. Remove attaching screws and remove

transformer.

45. IGNITION CONTROL

Gas Models Only Refer to Figure 24. a. Remove screws holding cover and remove

cover.

b. Loosen screws and disconnect all wires from

ignition control.

c. Remove attaching screws and remove ignition

control.

IGNITION

CONTROL

TERMINAL

BLOCK

34 70284701

CONTACTOR/

RELAY

Figure 24

TRA NSFO RMER

T408P

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

46. STEAM COIL

Refer to Figure 25.

CAUTION

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

a. Disconnect pipes to steam coil. b. Remove bottom screws holding steam coil to

back of tumbler cabinet.

c. Support steam coil and remove top screws, then

remove steam coil.

STEAM

COIL

W249

47. STEAM SOLENOID VALVE

Refer to Figure 25.

CAUTION

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

W249

a. Disconnect pipes. b. Disconnect wires. c. Remove valve by turning valve

counterclockwise.

70284701 35

STEAM

SOLENOID

VALVE

TMB2038P

Figure 25

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

48. DRIVE BELT

Refer to Figure 26. a. Unlock and remove lint panel. Refer to

Paragraph 20. b. Remove front panel. Refer to Paragraph 16. c. Remove palnut, jamnut and washer from

trunnion shaft. Refer to Figure 12. d. Install cylinder guide tool on cylinder shaft.

Refer to Figure 14.

WASHER

BELT

e. Remove drive access cover at rear of tumbler.

Refer to Figure 22.

f. Raise motor assembly and run belt off motor

pulley.

g. Pull cylinder out through front of cabinet. Refer

to Paragraph 27.

NOTE: Before reassembling cylinder, clean interior of cabinet, checking to make sure all tools have been removed.

MOTOR

PULLEY

CYLINDER

IDLER

PULLEY

SPRING

36 70284701

DRIVE

ACCESS

COVER

MOTOR

ASSEMBLY

TMB1847S

Figure 26

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

49. FAN

Refer to Figure 27. a. Remove four nuts and six screws holding fan to

rear of tumbler. b. Tip fan up from bottom to remove. c. Remove jamnut and palnut holding fan to

motor shaft. Refer to Figure 28.

d. Slide fan off shaft.

NOTE: Before attempting to service fan, always remove thermistor to prevent damage.

50. FAN MOTOR ASSEMBLY

Refer to Figure 28.

IMPORTANT: Before attempting to service fan, always remove thermistor to prevent damage.

a. Remove six screws and four nuts holding fan

motor mounting plate to cabinet. b. Remove motor mounting plate, fan assembly c. Remove palnut and jamnut from motor shaft

and remove fan from motor shaft. d. Remove bolts holding mounting plate to motor

and remove motor.

FAN

MOTOR

PALNUT

MOTOR

SHAFT

FAN

MOTOR

Figure 27

70284701 37

T305SE1A

JAMNUT

FAN

Figure 28

MOUNTING

PLATE

TMB1850S

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

51. DRIVE MOTOR

Refer to Figure 29.

CAUTION

To reduce the risk of injury, use care when reaching into cabinet through belt service door. The idler pulley could snap into place, causing injury.

W230

WASHER

BELT

a. Remove two screws holding drive access cover

in place. Remove door. Refer to Figure 22. b. Disconnect spring. c. Lift motor up. d. Reach into cabinet and disconnect belt by

rolling off pulley. e. Unscrew nut at end of shaft.

f. Remove plate and motor from shaft to service.

g. Set down motor, remove four bolts on top of

motor. h. Remove motor from plate.

MOTOR

PULLEY

IDLER

PULLEY

CYLINDER

38 70284701

SPRING

DRIVE

ACCESS

COVER

MOTOR

ASSEMBLY

T163KE3B

Figure 29

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.

52. LEVELING LEGS

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

a. Check front to rear level by rotating clothes

cylinder until one of the cylinder ribs is at the bottom. Place a level on the rib. Adjust legs as necessary.

W002

NOTE: The front of the tumbler should be slightly higher than the rear (approximately 1/8 inch,

3.18 mm). This will prevent the clothes, while tumbling, from wearing on the door glass gasket.

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

front and rear of top panel. Adjust legs as necessary.

IMPORTANT: Do not remove plastic caps covering leveling legs in lint compartment.

53. AIRFLOW SWITCH ADJUSTMENT

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

70284701 39

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

54. LOADING DOOR SWITCH

The door switch should be adjusted so the cylinder stops when door is opened 2 inches (51 mm), plus or minus 1/4 inch (6 mm). The switch is normally open and is closed when the door is closed. If adjustment is needed, proceed as follows:

a. Close door and start tumbler. Slowly open

loading door. Cylinder and heat system should shut off when door is open 2 inches (51 mm), plus or minus 1/4 inch (6 mm).

b. Slowly close loading door. When door is 2

inches or less from being fully closed, the switch actuator on the door should contact the switch plunger and depress it enough to close the switch with an audible “click”.

If tab does not depress the switch plunger enough to operate the switch, bend tab on loading door OUTWARD and repeat steps “a” and “b.”.

EUROPEAN MODELS (Prior to Serial Number 0208002174)

European tumblers, prior to Serial Number 0208002174, have a second door switch near the top of the door. Refer to Figure 30. This switch also should be adjusted so the cylinder stops when door is opened 2 inches (51 mm), plus or minus 1/4 inch (6 mm). This switch is normally closed and is opened by the hinge cam when the door is opened. If adjustment is needed, proceed as follows:

EUROPEAN DOOR

SWITCH

DOOR SWITCH

SCREWS

SWITCH

PLUNGER

SWITCH

ACTUATOR

Figure 30

DOOR

T275SE1B

a. Remove switch actuator so door switch click

can be heard.

b. Loosen door switch screws just enough so

switch can be moved left or right. Move door switch right if door opens too far before switch clicks. Move door switch left if door doesn’t open far enough before switch clicks.

c. Retighten door switch screws and retest. Repeat

step “b” if further adjustment is needed.

d. Reinstall switch actuator.

40 70284701

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.

55. LOADING DOOR STRIKE

Refer to Figure 31. The door strike must be adjusted so that sufficient

tension holds loading door closed against the force of a load tumbling against it. The door is properly adjusted when 8-15 lbs. (3.60-6.75 kg) of pull is required to open door.

To adjust, open door, loosen jamnut and turn door strike screw in or out as required. Retighten jamnut.

W002

Figure 31

LOADING

DOOR

JAMNUT

DOOR STRIKE

SCREW

T280SE3A

70284701 41

Section 6 Adjustments

Notes

42 70284701

Section 7

Electronic Control 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.

W002

56. THEORY OF OPERATION OF INSTANT ELECTRONIC IGNITION

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

If condition persists:

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

2. Check voltage present at valve.

3. Check that machine is properly grounded.

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

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

70284701 43

Section 7 Electronic Control Troubleshooting

57. CANNOT PERFORM INFRARED (IR) COMMUNICATION

Single and stacked.

Gas and electric heat.

Attempt to

communicate with

the electronic

control from the

microwand.

Is there a response of

any kind from the

electronic control?

YES

Single and three phase

supply.

NO

Aim microwand

closer and try again.

Does the control

respond?

YES

Check the following:

- low battery on microwand.

- is the IR window covered or

NO

blocked on the control.

- if needed replace the electronic control.

- is the IR cap properly attached

to the microwand.

Does the electronic

control display E:OF

or -C-?

E:OF

Check the following:

- IR communication disabled by manual programming.

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

- if needed, change electronic control board.

-C-

Communication

sequence checks

out.

T027D

44 70284701

58. COINS IGNORED WHEN ENTERED

Start coin drop

diagnostic tests.

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

phase voltage.

Section 7 Electronic Control Troubleshooting

Does the display on the

EDC control increment

properly?

NO

Is connector H2 firmly

seated in its receptacle?

YES

Is the 3 pin connector

between coin drop and

control connected

correctly?

YES

Are wires exiting coin

drop optical sensor

cracked or broken?

YES

NO

YES

Exit diagnostic

testing and reset

control. (Prompting

for vend price)

Reconnect and run

diagnostic test

again.

Reconnect and run

diagnostic test

again.

Replace coin drop

or optic switch.

NO

Replace coin drop or optic switch.

If problem still

exists then replace

the EDC control.

TMB1822S

70284701 45

Section 7 Electronic Control Troubleshooting

59. CONTROL DISPLAY – DOOR OPEN LIGHT “ON”

(1)

Is there voltage at

H4-6 on the

Is there power supplied

Is there voltage to input

Is there voltage across

electronic

control?

NO

to the unit?

YES

(2)

of primary fuses?

YES

(3)

Is there voltage to output side of the

primary fuses?

YES

(4)

terminals 1 & 2 of

transformer primary?

YES

(5)

terminals 2 & 3 of

transformer secondary?

YES

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

phase supply.

YES

Replace

NO

between primary fuses and power

Replace primary

between primary

Reference voltage

checks to transformer

electronic

control.

Plug unit in and

run it.

Correct wiring

supply.

fuse(s).

Correct wiring

fuses and

transformer.

Replace

transformer.

neutral.

Is there voltage at

the input of the

secondary fuse?

YES

Is there voltage to

output side of

secondary fuse?

YES

Is there voltage to

N.O. of door

switch?

YES

With door closed is

there voltage to

COM of door

switch?

YES

Is there voltage to

N.O. of lint drawer

switch?

YES

Is there voltage to

COM of lint drawer

switch with lint

panel closed?

YES

Correct wiring

between H4-6 of

electronic

control and

COM of lint drawer

switch.

(6)

(7)

(8)

(9)

(10)

(11)

NO

Correct wiring

between secondary

fuse and

transformer.

Replace secondary

fuse.

Correct wiring

between N.O. and

output of secondary

fuse.

Check for proper

function of door

switch replace if

necessary.

Correct wiring

between N.O. on lint

drawer and COM on

door switch.

Check for proper

operation replace if

necessary.

T028D

46 70284701

T028D

Section 7 Electronic Control Troubleshooting

60. CONTROL DISPLAY – “DOOR” ERROR ON 25, 30, STACKED 30 AND 35 POUND TUMBLERS WITH 24 VOLT EDC CONTROLS

TMB1788S

3

2

4

70284701 47

1

11

10

9

8

7

5

6

Section 7 Electronic Control Troubleshooting

61. CONTROL DISPLAY – NO VISIBLE DISPLAY – OPL MICROPROCESSOR MODELS

Gas, steam and electric heat. Single and three

phase supply.

Is there voltage

supplied to the unit?

YES

Note: Reference voltage to

Is there voltage to the

input side of the

primary fuse(s)?

YES

Is there voltage to the

output side of the

primary fuse(s)?

YES

Is there voltage

across the primary side

of the transformer?

NO

supply neutral.

NO

Connect supply

voltage and run unit.

Correct wiring

between primary

fuse and supply.

Replace primary

fuse.

Correct wiring

between transformer

and primary fuse.

Is there voltage across

fuse on OPL Micro?

YES

Replace fuse.

NO

Replace OPL Micro.

YES

Is there voltage across

1 & 4 of transformer

secondary?

YES

Is there voltage across

terminals H3-3 &

H3-4 on OPL Micro?

YES

NO

Replace transformer

Correct wiring

between OPL Micro

and transformer

secondary.

TMB1823S

48 70284701

Section 7 Electronic Control Troubleshooting

62. CONTROL DISPLAY – NO VISIBLE DISPLAY – POWER ON

Single and stacked

units. Gas and electric

heat. Single and three

phase supply.

Is there voltage across

H4-2 & H4-5 on the

EDC control?

Replace EDC

Control.

Is there voltage at

the input of the

secondary fuse?

NOYES

Correct wiring

between secondary

fuse and

transformer.

NO

Is there power supplied

to the unit?

YES

Is there voltage to input

of primary fuses?

YES

Is there voltage to output side of the

primary fuses?

YES

Is there voltage across

terminals 1 & 2 of

transformer primary?

NO

Plug unit in and run

it.

Correct wiring between primary fuses and power

supply.

Replace primary

fuse(s).

Correct wiring between primary

fuse and

transformer.

YES

Is there voltage to

output side of

secondary fuse?

YES

Correct wiring

between H4-2 and

secondary fuse.

NO

Replace secondary

fuse.

YES

Is there voltage across

terminals 2 & 3 of

transformer secondary?

YES

70284701 49

NO

Replace

transformer.

T025D

Section 7 Electronic Control Troubleshooting

63. WILL NOT START – ELECTRIC – MANUAL TIMER

Manual Timer, with and without time delay board. Single and

stacked units. Single and three phase power supply.

Is there power supply

voltage coming to the

tumbler?

YES

Is there

voltage at the primary side

of the transformer at

terminals 1 and 2?

YES

Is

there voltage at the

secondary side of the

transformer at terminal

2 and 3?

YES

Is there voltage to the

output side of the

secondary fuse?

NOTE: White wires are

YES

transformer "neutral"

NO

Connect power

and run the cycle.

Change the primary

fuse to the

transformer.

Replace the transformer.

Change the

secondary fuse.

Still no voltage

For stacked units.

Correct the wiring

NO

secondary fuse and

the transformer.

Correct wiring

between power

supply and

transformer.

Correct wiring

between upper and

lower pocket.

between the

Is there voltage to the

N.O. terminal of the

door switch?

NO

Correct the wiring between the door

switch and the secondary fuse.

With lint panel

closed is there votlage to

N.O. terminal of the

liint panel switch?

NO

YES

With door closed Is

there voltage at COM

of the door switch?

Check for proper

operation,

replace the door

necessary.

Replace lint

panel switch.

NO

switch if

YES

Refer to NO MOTOR RUN (run circuit.)

Is there voltage to the

COM of the lint panel

switch?

NO

Correct wiring

between lint panel

switch and door

switch.

YES

T050D

50 70284701

64. WILL NOT START – ELECTRIC – ROTARY COIN DROP

(Sheet 1 of 2)

Coin Drop with and without time delay boards.

Single and stacked units. Single and three phase

power supply.

Section 7 Electronic Control Troubleshooting

Is there power supply

voltage coming to the

unit?

YES

Is there voltage at

the primary side of the

transformer at terminals

1 & 2?

YES

Is there voltage

at the secondary side of the

transformer at terminal

2 and 3?

YES

Is there voltage

to the output side of the

secondary fuse?

YES

Note: Reference voltage

to transformer neutral.

(White wire)

Is there voltage to

N.C. terminal of

switch A on rotary

coin drop?

YES

NO

between transformer

NO

Connect power to

the unit and run

cycle.

Is the primary

fuse good?

YES

Correct wiring

and power supply.

Replace the transformer.

Is the

secondary

fuse good?

YES

Correct wiring

between secondary

of transformer and

fuse.

Correct wiring

between rotary

coin drop and

secondary fuse.

NO

Replace fuse and

run

machine.

Replace fuse and

run

machine.

Is there voltage

across coinmeter timer

motor?

YES

Does the

coinmeter timer motor

advance?

YES

Is there voltage at

N.O. terminal of the

door switch?

YES

With the door

closed is there

voltage across the

door switch?

NO

Is there voltage to

the N.O. terminal of

the lint panel

switch?

YES

NO

YES

NO

Correct wiring

between coinmeter timer motor and COM

on switch A.

Replace coinmeter

timer motor.

Correct wiring

between N.O. on

door switch and

COM on switch A.

Check door switch for proper operation, replace if necessary.

Correct wiring

between N.O. on the

lint panel switch and

COM of door switch.

Is the unit equipped

with time delay

boards?

NO

the vend price satisfied.

Is there voltage on the

COM terminal of switch

A?

YES

70284701 51

YES

Note: The following

checks are made with

NO

Continued on next

page at step 1.

Replace switch A.

With the lint

panel closed is there

voltage across the

lint panel switch?

NO

Continued on next

page at step 2.

Step 3 continuation.

YES

Check lint panel

switch for proper

operation and

replace if necessary.

T075D

Section 7 Electronic Control Troubleshooting

WILL NOT START – ELECTRIC – ROTARY COIN DROP

(Sheet 2 of 2)

STEP 1

Is there voltage to

H1-2 on TMR1

board?

YES

Note: Following tests

With vend price

satisfied is there

voltage across N.C. &

COM of switch A?

NO

Is there voltage across

the timer motor?

YES

Does coinmeter timer

motor advance?

NO

are conducted with

vend price satisfied.

YES

NO

Correct wiring

between

H1-2 and

output of

secondary

fuse.

Replace switch A.

Correct wiring between timer

motor and COM on

switch A.

Replace timer

motor.

3 phase

STEP 2

Is there voltage at

2A of the start

switch?

YES

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

Single phase

Is there voltage at

terminal 7 of the

motor relay?

YES

NO

Refer to NO

MOTOR RUN

(run circuit).

Correct wiring

between 2A of start

switch and COM of

lint panel switch.

Correct wiring

between 7 of

motor relay and COM

of lint panel switch.

YES

Is there voltage across

H1-6 & H1-8 of

TMR1?

YES

Is there voltage across

H1-2 & H1-3 of

TMR1?

NO

Is there voltage to N.O.

of door switch?

YES

Continue at step 3

on previous page.

NO

YES

NO

Correct wiring

between H1-6 and

COM on switch A.

Replace TMR1.

Correct wiring between N.O. of door switch and

H1-3 of TMR1.

Is there voltage at terminal 14 of the

motor control relay?

YES

Refer to NO

MOTOR RUN (Run

Circuit).

NO

Correct wiring to

terminal 14 of

motor control

relay.

T076D

52 70284701

65. WILL NOT START – GAS – MANUAL TIMER

Section 7 Electronic Control Troubleshooting

No motor run (start circuit) Manual Tumblers. Single and stacked units

with and without time delay.

Is there power supply voltage coming to the

tumbler?

YES

Is there voltage

at the primary side of the

transformer at

terminals 1 and 2?

YES

Is there voltage

secondary side of the

at the transformer at terminal

2 and 3?

YES

Is there voltage to the

output side of the

secondary fuse?

NO

Connect power

and run the cycle.

Change the primary

fuse to the

transformer.

Replace the transformer.

Change the

secondary fuse.

Still no voltage

For stacked units.

Correct the wiring

NO

secondary fuse and

the transformer

Correct wiring

between power

supply and

transformer.

Correct wiring

between upper and

lower pocket.

between the

.

NOTE: White wires are

YES

Is there voltage to the

input side of the door

switch?

NO

Correct the wiring between the door

switch and the

secondary fuse.

Is there voltage to the output side of the lint

panel switch?

NO

transformer "neutral"

YES

Is there voltage to the

output side of the door

switch?

Replace the door switch.

Replace lint

panel switch.

NO

YES

Refer to NO

MOTOR RUN

(run circuit).

Is there voltage to the

input side of the lint

panel switch?

NO

Correct wiring

between lint panel

switch and door

switch.

YES

T041D

70284701 53

Section 7 Electronic Control Troubleshooting

66. WILL NOT START – GAS – ROTARY COIN DROP

(Sheet 1 of 2)

Single &

stacked tumblers

with and without time delay.

Is there power supply

voltage coming to the

unit?

YES

Is there voltage

at the primary side of the

transformer at terminals

1 & 2?

YES

Is there voltage at the secondary side of the

transformer at terminal

2 and 3?

YES

Is there voltage to the

output side of the secondary fuse?

YES

Note: Reference voltage to

transformer neutral.

Is there voltage to

N.C. terminal of

switch A on rotary

coin drop?

YES

NO

(White wire)

NO

Connect power to

the unit and run

cycle.

Is the primary

fuse good?

YES

Correct wiring

between transformer

and power supply.

Replace the

transformer.

Is the secondary fuse good?

YES

Correct wiring

between secondary

of transformer and

fuse.

Correct wiring between rotary coin drop and secondary

fuse.

NO

Replace fuse and

run

machine.

Replace

fuse and

run

machine.

Is there voltage across coinmeter timer motor?

YES

Does the coinmeter

timer motor

advance?

YES

Is there voltage at

N.O. terminal of the

door switch?

YES

With the door

closed is there

voltage across the

door switch?

NO

Is there voltage to

the N.O. terminal of

the lint panel

switch?

YES

NO

YES

NO

Correct wiring

between

coinmeter timer

motor and COM

on switch A.

Replace coinmeter

timer motor.

Correct wiring between N.O on door switch and

COM on switch A.

Check door switch for proper operation, replace if necessary.

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

Is the unit equipped

with time delay

boards?

NO

checks are made with

the vend price satisfied.

Is there voltage on the

COM terminal of switch

A?

YES

54 70284701

YES

Note: The following

NO

Continued on next

page at step 1.

Replace switch A.

With the lint

panel closed is there

voltage across the lint

panel switch?

NO

Continued on next

page at step 2.

Step 3 continuation.

YES

Check lint panel

switch for proper

operation and replace if necessary.

T086D

WILL NOT START – GAS – ROTARY COIN DROP

(Sheet 2 of 2)

Section 7 Electronic Control Troubleshooting

STEP 1

Is there voltage to

H1-2 on TMR1

board?

YES

Note: Following tests

With vend price

satisfied is there

voltage across N.C. &

COM of switch A?

NO

Is there voltage across

the timer motor?

YES

Does coinmeter timer

motor advance?

NO

are conducted with vend price satisfied.

YES

NO

Correct wiring

between H1-2 and output of

secondary

fuse.

Replace switch A.

Correct wiring

between timer motor

and COM on switch

A.

Replace timer

motor.

STEP 2

Is there voltage at

2A of the start

switch?

YES

Is there voltage at

terminal 7 of the

motor relay?

YES

NO

Refer to NO

MOTOR RUN

(run circuit).

Correct wiring between 2A of start switch and COM of

lint panel switch.

Correct wiring

between 7 of motor

relay and COM of

lint panel switch.

YES

Is there voltage across

H1-6 & H1-8 of

TMR1?

YES

Is there voltage across

H1-2 & H1-3 of

TMR1?

NO

Is there voltage to N.O.

of door switch?

YES

Continue at step 3

on previous page.

NO

YES

NO

Correct wiring

between H1-6 and

COM on switch A.

Replace TMR1.

Correct wiring between N.O. of door switch and

H1-3 of TMR1.

T087D

70284701 55

Section 7 Electronic Control Troubleshooting

67. WILL NOT START – STEAM – MANUAL TIMER

Single and stacked units with and without

time delay boards.

Is there power supply voltage coming to the

tumbler?

YES

Is there voltage

at the primary side of the

transformer at

terminals 1 and 2?

YES

Is there voltage

at the secondary side of the

transformer at terminal

2 and 3?

YES

Is there voltage

to the output side of the

secondary fuse?

NO

Connect power

and run the cycle.

Change the primary

fuse to the

transformer

Replace the transformer.

Change the

secondary fuse.

Still no voltage

For stacked units.

Correct the wiring

NO

secondary fuse and

the transformer.

Correct wiring

between power

supply and

transformer.

Correct wiring

between upper and

lower pocket.

between the

NOTE: White wires are

YES

transformer "neutral"

Is there voltage

to the N.O. terminal of the

door switch?

NO

Correct the wiring between the door

switch and the secondary fuse

Is there voltage to the

N.O. terminal of the

lint panel switch?

NO

YES

Is there voltage to the

COM terminal of the

door switch?

Replace the

door switch.

Replace lint

panel switch.

NO

YES

Refer to NO MOTOR RUN (run circuit) .

Is there voltage to the

COM terminal of the

lint panel switch?

NO

Correct wiring

between lint panel

switch and door

switch.

YES

T016D

56 70284701

68. WILL NOT START – STEAM – ROTARY COIN DROP

(Sheet 1 of 2)

Single and

stacked tumblers

with and without time delay.

Section 7 Electronic Control Troubleshooting

Is there power supply

to the unit?

YES

Is there voltage

at the primary side of the

transformer at terminals

1 & 2?

YES

Is there voltage

at the secondary side of the

transformer at terminal

2 and 3?

YES

Is there voltage to the

output side of the

secondary fuse?

YES

Note: Reference voltage to

transformer neutral.

Is there voltage to

N.C. terminal of

switch A on rotary

coin drop?

YES

NO

(White wire)

NO

Connect power to

the unit and run

cycle.

Is the primary

fuse good?

YES

Correct wiring

between transformer

and power supply.

Replace the transformer.

Is the

secondary

fuse good?

YES

Correct wiring

between secondary

of transformer and

fuse.

Correct wiring between rotary coin drop and secondary

fuse.

NO

Replace

fuse and

run

machine.

Replace

fuse and

run

machine.

Is there voltage across

coinmeter timer motor?

YES

Does the coinmeter

timer motor

advance?

YES

Is there voltage at

N.O. terminal of the

door switch?

YES

With the door

closed is there

voltage across the

door switch?

NO

Is there voltage to

the N.O. terminal of

the lint panel

switch?

YES

NO

YES

NO

Correct wiring

between coinmeter timer motor and COM

on switch A.

Replace coinmeter

timer motor.

Correct wiring

between N.O on

door switch and

COM on switch A.

Check door switch for proper operation, replace if necessary.

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

COM of door switch.

Is the unit equipped

with time delay

boards?

NO

checks are made with

the vend price satisfied.

Is there voltage on the

COM terminal of switch

A?

YES

70284701 57

YES

Note: The following

NO

Continued on next

page column 1.

Replace switch A.

With the lint

panel closed is there

voltage across the

lint panel switch?

NO

Continued on next

page column 2.

Step 3 continuation.

YES

Check lint panel

switch for proper

operation and

replace if necessary.

T062D

Section 7 Electronic Control Troubleshooting

WILL NOT START – STEAM – ROTARY COIN DROP

(Sheet 2 of 2)

COLUMN 1

Is there voltage to

H1-2 on TMR1

board?

YES

Note: Following tests

are conducted with

vend price satisfied.

With

vend price satisfied is

there voltage across N.C. &

COM of switch A?

NO

Is there voltage across

the timer motor?

YES

Does coinmeter timer

motor advance?

NO

YES

NO

Correct wiring

between

H1-2 and

output of

secondary

fuse.

Replace switch A.

Correct wiring

between timer motor

and COM on switch

A.

Replace timer

motor.

COLUMN 2

Is there voltage at

2A of the start

switch?

YES

Is there voltage at

terminal 7 of the

motor relay?

YES

NO

start switch and COM

NO

motor relay and COM

Refer to NO

MOTOR RUN

(run circuit).

Correct wiring

between 2A of

of lint panel switch.

Correct wiring

between 7 of

of lint panel switch.

YES

Is there voltage across

H1-6 & H1-8 of

TMR1?

YES

Is there voltage across

H1-2 & H1-3 of

TMR1?

NO

Is there voltage to N.O.

of door switch?

YES

Continue at step 3

on previous page.

NO

YES

NO

Correct wiring

between H1-6 and

COM on switch A.

Replace TMR1.

Correct wiring

between N.O. of

door switch and

H1-3 of TMR1.

T063D

58 70284701

Section 7 Electronic Control Troubleshooting

69. WILL NOT START/CONTINUE RUNNING – EDC CONTROL

(Sheet 1 of 3)

Single and stacked

Note: Test conducted with vend

price satisfied and start button

Is there voltage at

H4-4 on the EDC

control to transformer

neutral?

pressed.

YES

Continued on next

units. Gas, electric and steam heat. Single and

three phase supply.

page.

Is there voltage at the

input of the secondary

fuse?

NO

Correct wiring

between secondary

fuse and

transformer.

NO

Is there power supplied

to the unit?

YES

Is there voltage to input

of primary fuse(s)?

YES

Is there voltage to

output side of the

primary fuse(s)?

YES

NO

Plug unit in and run

it.

Correct wiring

between primary

fuse(s) and power

supply.

Replace primary

fuse.

YES

Is there voltage to

output side of

secondary fuse?

YES

Is there voltage to N.O.

of door switch?

YES

With door closed is

there voltage to COM

of door switch?

YES

Is there voltage to N.O.

of lint drawer switch?

NO

Replace secondary

fuse.

Correct wiring

between N.O. and

output of secondary

fuse.

Check for proper

function of door

switch replace if

necessary.

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

door switch.

YES

Is there voltage

across terminals 1 & 2 of

transformer primary?

YES

Is there voltage

across terminals 2 & 3 of

transformer secondary?

YES

70284701 59

NO

Correct wiring

between primary

fuse and

transformer.

Replace

transformer.

Is there voltage to

COM of lint drawer

switch with lint panel

closed?

YES

Is there voltage at

H4-1 on the EDC

control board?

YES

Replace EDC

Control.

NO

Check for proper

operation replace if

necessary.

Correct wiring between H4-1 and COM of lint drawer

switch.

T029D

Section 7 Electronic Control Troubleshooting

WILL NOT START/CONTINUE RUNNING – EDC CONTROL

(Sheet 2 of 3)

Note: Tests conducted with vend

price satisfied and start button

pressed.

Is there voltage across

terminals 1 & 4 of

the fan motor?

NO

Correct wiring

between fan motor

and motor control

relay.

Three phase.

Refer to Note

on next page

Is there voltage on B

terminal of motor

control relay?

YES

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

Single phase

Is there voltage to

terminal 5 of the

motor control relay?

YES

Is there voltage to

terminal 8 of motor

control relay?

YES

NO

Correct wiring

between B and

H4-4.

Correct wiring

between terminal 5

and power supply.

Replace motor

control relay.

YES

Does the fan motor

run?

YES

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

Three phase.

Refer to Note

on next page

Is there supply voltage

to L2 & L3 of motor

control relay?

YES

Is there voltage across

terminals L2 & T2 and

L3 & T3?

NO

Single phase

NO

YES

Replace fan motor.

Correct wiring

between L2, L3 and

supply.

Replace motor

control relay.

NO

Is there supply voltage

to L1 and L2 of the

motor control relay?

YES

Is there votlage across

L1 & T1 and L2 & T2?

NO

60 70284701

NO

YES

Correct wiring

between L1, L2 and

power supply.

Replace motor

control relay.

Is there voltage at

terminal 6 of motor

control relay?

YES

Is there voltage at

terminal 9 of motor

control relay?

YES

NO

Continued on next

Correct wiring

between terminal 6

of motor control

relay and supply.

Replace motor

control relay.

page.

T030D

Section 7 Electronic Control Troubleshooting

WILL NOT START/CONTINUE RUNNING – EDC CONTROL

(Sheet 3 of 3)

Is there voltage across

terminals 1 & 4 of

cylinder motor?

YES

Does the cylinder

motor run?

YES

Motors are

operational.

Note: For high voltage three phase supply (380 volts

or higher), the cylinder and fan motors are supplied

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

T2, T3. Make the appropriate adjustments when

doing voltage checks.

NO

Correct wiring

between cylinder

motor and motor

control relay.

Replace cylinder

motor.

T031D

70284701 61

Section 7 Electronic Control Troubleshooting

70. WILL NOT START/CONTINUE RUNNING – OPL MICROPROCESSOR CONTROL

(Sheet 1 of 3)

Gas, steam and

electric heat.

Single and three phase

supply.

Reference voltage to

supply neutral.

Is power supplied to

unit?

NO

Connect supply

and run unit.

Is there voltage to

output of secondary

fuse?

NO

Replace secondary

fuse.

YES

Is there voltage to input

of primary fuse(s)?

YES

Is there voltage to

output of primary

fuse(s)?

YES

Is there voltage

across terminals 1 & 2

on primary of

transformer?

YES

NO

between transformer

Correct wiring

between primary

fuse and supply.

Change primary

fuse.

Correct wiring

and primary fuse.

YES

Is there voltage to

N.O. terminal of door

switch?

YES

With door closed is

there voltage to COM

of door switch?

YES

Is there voltage to

N.O. of lint panel

switch?

YES

NO

Correct wiring between N.O.

terminal of door

switch and

secondary fuse.

Check for proper

operation, replace

door switch if

necessary.

Correct wiring between N.O. of lint panel switch

and COM of door switch.

Is there voltage

across terminals 2 & 3

of transformer

secondary?

YES

Note: Reference voltage to

transformer secondary neutral

Is there voltage to input

of secondary fuse?

YES

62 70284701

NO

terminal 3.

NO

Replace

transformer.

Correct wiring

between secondary

fuse and

transformer.

Is there voltage to COM of lint panel

switch with lint panel

closed?

YES

Is there voltage at terminal 8 of OPL

Micro?

YES

Continued on next

page.

NO

Check for proper

operation and

replace lint panel

switch if necessary.

Correct wiring

between terminal

8 of OPL Micro

and COM of lint

panel switch.

T099D

Section 7 Electronic Control Troubleshooting

WILL NOT START/CONTINUE RUNNING – OPL MICROPROCESSOR CONTROL

(Sheet 2 of 3)

Tests conducted with cycle selected and

start key pad activated.

Is there voltage at terminal 7 on OPL

Micro?

NO

Replace OPL Micro.

Is there voltage

across terminals

1 & 4 of fan

motor?

YES

NO

Correct wiring

between fan motor

and motor control

relay.

YES

Is

there voltage

across terminals

B & A of motor control relay

for OM model and terminals

0 & 1 for RM

models?

YES

Is unit supplied with

single phase or three

phase power?

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

Is there voltage to L1

and L2 of the motor

control relay?

YES

Is there voltage to T1

and T2 of the motor

control relay?

YES

NO

Single phase

Reference voltage to

supply neutral.

NO

Correct wiring to

motor control relay.

Correct wiring

between L1, L2 and

power supply.

Replace motor

control relay.

Single phase

Does the fan

motor run?

YES

Does the unit

have reversing

capabilities?

NO

Does the unit

have single

phase or three

phase supply?

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

Is

there voltage

to L2 and L3 on

the motor control

relay?

YES

Is

there voltage

to T2 and T3 on

the motor control

relay?

NO

YES

NO

Replace fan motor.

See cylinder

rotation. Either

forward or reverse.

Correct wiring

between L2, L3 and

power supply.

Replace motor

control relay.

Is there

voltage at terminal

5 on the motor control

relay for OM models and

terminal 2 for RM

models?

YES

Is there

voltage across

terminals 5 & 8 of

the motor control relay for OM

models and terminals 2

& 4 for RM

models?

NO

70284701 63

NO

YES

Correct wiring

between motor

control relay and

power supply.

Replace motor

control relay.

Is there voltage to

terminal 6 of motor

control relay?

YES

Is there voltage

across terminals 6 & 9 of

motor control relay?

NO

between terminal

NO

6 motor control

relay and supply

YES

Continued on next

page.

Correct wiring

voltage.

Replace motor

control relay.

TMB1824S

Section 7 Electronic Control Troubleshooting

WILL NOT START/CONTINUE RUNNING – OPL MICROPROCESSOR CONTROL

(Sheet 3 of 3)

Is there voltage

across terminals 1 & 4 of

the cylinder motor?

YES

Does the cylinder

motor run?

YES

Unit operational.

NOTE: For three phase high voltage (380 volts or

higher), the cylinder and fan motors are supplied L1, L2,

L3 through the motor relay terminals T1, T2, T3. Make

the appropriate voltage checks while doing trouble

shooting.

NO

Correct the wiring

between the

cylinder motor and

control relay.

Replace cylinder

motor.

T009D

64 70284701

71. WILL NOT RUN – ELECTRIC – MANUAL TIMER

(Sheet 1 of 3)

With and without time delay boards.

Single and stacked units.

Single and three phase power supply.

Section 7 Electronic Control Troubleshooting

Is there voltage at terminal C on the

drying timer?

YES

Is there voltage at

terminal B on the

drying timer?

YES

Is there voltage across

terminals 7 and 8 of

CR1 relay?

YES

Is there voltage across

terminal 3 and 5 of

CR1 relay?

NO

NOTE: make sure drying

timer is in the "on"

position.

NO

YES

between drying

timer and lint panel

Replace drying

Correct the wiring

between CR1 relay

and terminal B on

Replace CR1 relay.

Correct wiring

switch.

timer.

drying timer.

NO

Is there voltage across

Is the unit equipped

with a time delay

board?

YES

H1-6 & H1-8 on

TMR1?

YES

**

Is there voltage across

terminals H1-4 &

H1-8 on TMR2?

YES

**

Is there voltage across

DOB contacts on

TMR2?

NO

YES

Correct wiring to

TMR1.

Check for proper

operation of

airflow switch.

Replace time

delay board.

NO

NOTE: This test to be

made with push to start

switch pressed in.

Is there voltage

across terminals 2A

& 1A of push to

start switch?

NO

NOTE: The N.O. contact is closed in the rest

**

Is there voltage across

COM and N.O. of

the airflow switch?

NO

Tested with the start switch pressed in.

**

YES

position due to the physical

mounting of the switch.

YES

Replace push to

start switch.

Adjust the airflow

switch or replace if

inoperative.

CONTINUED

ON NEXT

PAGE.

YES

NO

**

Is there voltage across

terminals 7 & 8 of

CR2 relay?

YES

Is there voltage across

terminals 5 & 3 on

the CR2 relay?

NO

**

Is there voltage across

coils B & A of the

motor control relay?

NO

YES

NO

Correct wiring

between CR2

relay and

airflow switch.

Replace CR2

relay.

Correct wiring

between motor

control relay

and airflow

switch.

T051D

70284701 65

Section 7 Electronic Control Troubleshooting

WILL NOT RUN – ELECTRIC – MANUAL TIMER

(Sheet 2 of 3)

Is this a single phase

or three phase unit?

Single phase

**

Is there voltage

across terminal 7 & 4 of

the motor control

relay?

NO

Is there

voltage at terminal 5

on the motor control relay

across terminals 5 & 3

to supply

neutral?

YES

Is

there voltage

of the motor control

relay?

NO

Three phase

YES

NO

YES

Replace motor

control relay.

Correct wiring between terminal 5 and supply voltage.

Replace motor

control relay.

Is there

voltage across terminals 14 & 13 of motor control relay?

NO

Is there voltage to L1 of motor control relay?

YES

Is there voltage to L2 of motor control relay?

YES

Is there

voltage across

L1 to T1 and L2 to

T2 on the motor

control relay?

NO

YES

NO

YES

Replace motor

control relay.

Correct wiring

between L1 and

power supply.

Correct wiring

between L2 and

power supply.

Replace motor

control relay.

Is

there voltage

across terminals 1 & 4

of fan motor?

YES

Does the fan motor

run?

YES

**

Tested with the start switch pressed in.

NO

Correct wiring

between fan

motor and contact

8 on the motor

control relay.

Replace the fan

motor.

Is there

voltage across terminals

3 & 5 of the fan motor

centrifugal switch with

the fan motor

running?

NO

Continued on next

page.

Note: Only for non time

delay machines

YES

Replace fan

motor.

TMB1825S

66 70284701

WILL NOT RUN – ELECTRIC – MANUAL TIMER

(Sheet 3 of 3)

Section 7 Electronic Control Troubleshooting

Is unit single phase or

three phase?

Single phase.

Is there voltage to terminal 6 on the

motor control relay?

YES

Is there

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

NO

Is there voltage at terminals 1 & 4 of

the cylinder motor?

YES

Three phase.

NO

YES

NO

Correct wiring

between terminal

6 and power

supply.

Replace motor

control relay.

Correct wiring

between cylinder

motor and contact

9 on the motor

control relay.

Is there voltage to L2

on motor control relay?

YES

Is there voltage to L3

on motor control relay?

YES

Is there

voltage across

L2 to T2 and L3 to

T3 on the motor

control relay?

NO

YES

Correct wiring

between motor

control relay and

supply.

Correct wiring

between motor

control relay and

supply.

Replace motor

control relay.

Does the cylinder

motor run?

YES

The cylinder and

fan motors are

operational.

NO

Replace the

cylinder motor.

T053D

70284701 67

Section 7 Electronic Control Troubleshooting

72. WILL NOT RUN – ELECTRIC – ROTARY COIN DROP

(Sheet 1 of 3)

Single and Stack with and without

time delay. Single and three phase power.

Tested with vend price

**

satisfied and with start

**

Is there voltage across

terminals 2A & 1A

of push to start

switch?

NO

Is there voltage to

COM of the airflow

switch?

YES

**

Is there voltage across

COM and N.O. of

the airflow switch?

NO

switch pressed in.

YES

Note: Reference

voltage to transformer

neutral.

NOTE: The N.O. contact is closed in the rest

position due to the physical mounting

YES

NO

of the switch.

Replace push to

start switch.

Correct wiring

between COM of airflow switch and 1A on start switch.

Replace inoperative

switch or correct

airflow vane

operation.

**

Is there voltage across

terminals 7 & 8 of

CR2 relay?

YES

**

Is there voltage across

terminals 5 & 3 on

the CR2 relay?

NO

**

Is there voltage across

the coil of the motor

control relay?

YES

Is unit single

phase or three

phase?

Single phase

NO

YES

NO

Three phase Refer to note.

Correct wiring

between CR2

relay and

airflow switch.

Replace CR2

relay.

Correct wiring

between motor

control relay

and airflow

switch.

Continued on

Is the unit equipped

with a time delay

board?

YES

**

Is there voltage across

terminals H1-4 &

H1-8 on TMR2?

YES

**

Is there voltage across

DOB contacts on

TMR2?

NO

YES

Check for proper

operation of

airflow switch and

check wiring.

Replace time

delay board.

Tested with the start switch pressed in.

**

Is there voltage across

terminal 7 & 4 of the

motor control relay?

NO

Is there voltage at

terminal 5 on the

motor control relay?

YES

Continued on next page COLUMN 1.

YES

NO

Replace motor

control relay.

Correct wiring

between

terminal 5

and supply

voltage.

T072D

68 70284701

WILL NOT RUN – ELECTRIC – ROTARY COIN DROP

(Sheet 2 of 3)

Section 7 Electronic Control Troubleshooting

COLUMN 1

Is there voltage across

terminal 5 & 8 of the

motor control relay?

NO

Is there voltage across

terminals 1 & 4 of

fan motor?

YES

Does the fan motor

run?

YES

Is there

voltage across

terminals 3 & 5 of

the fan motor

centrifugal switch with

the fan motor

running?

YES

Replace motor

control relay.

Correct wiring

NO

YES

between fan

motor and contact

8 on the motor

control relay.

Replace the fan

For units without time

delay boards.

Replace fan

motor.

COLUMN 2

Is there voltage across

terminal 14 & 13 of

motor control relay?

NO

Is there voltage to L1 &

L2 terminals on motor

control relay?

YES

Is there voltage to T1 &

T2 terminals on motor

control relay?

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

terminals T1, T2, T3. Make the appropriate

adjustments when doing trouble shooting.

YES

NO

NOYES

Replace motor

control relay.

Correct wiring

between L1, L2

and supply.

Replace motor

control relay.

NO

Is the machine

supplied with single

phase or three phase

power?

Single phase

Is there voltage to

terminal 6 on the

motor control relay?

YES

Continued on next

page COLUMN 1.

Three phase Refer to Note.

NO

Correct wiring

between terminal

6 and power

supply.

Is there voltage to L2 & L3 terminals

on motor control

relay?

YES

Is there voltage

across L2 to T2 and

L3 to T3?

NO

Does the cylinder

motor run?

YES

CYLINDER AND

FAN MOTORS ARE

OPERATIONAL.

NO

YES

NO

Correct wiring

between supply

and L2 & L3

terminals.

Replace motor

control relay.

Replace cylinder

motor.

T073D

70284701 69

Section 7 Electronic Control Troubleshooting

WILL NOT RUN – ELECTRIC – ROTARY COIN DROP

(Sheet 3 of 3)

COLUMN 1

Is there

voltage across

terminals 6 & 9 of

motor control relay?

NO

YES

Replace motor

control relay.

Is there voltage at terminals 1 & 4 of

the cylinder motor?

YES

Does the cylinder

motor run?

YES

The cylinder and

fan motors are

operational.

NO

Correct wiring

between cylinder

motor and contact

9 on the motor

control relay.

Replace the

cylinder motor.

T074D

70 70284701

73. WILL NOT RUN – GAS – MANUAL TIMER

(Sheet 1 of 2)

No motor run (run circuit).

and stacked units with and without

Single

time delay boards.

Section 7 Electronic Control Troubleshooting

Is there voltage at

terminal c on the

drying timer?

YES

Is there voltage at

terminal b on the

drying timer?

YES

Is there voltage across

terminals 7 and 8 of

CR1 relay?

YES

Is there voltage across

terminal 3 and 5 of

CR1 relay?

NO

NOTE: make sure drying

timer is in the “on”

position.

NO

YES

between drying

timer and lint panel

Replace drying

Correct the wiring

between CR1 relay

and terminal b on

Replace CR1 relay.

Correct wiring

switch.

timer.

drying timer.

NO

Is the unit equipped

with a time delay

board?

YES

Is there voltage across

H1-6 & H1-8 on

TMR1?

YES

**

Is there voltage across

terminals H1-4 &

H1-8 on TMR2?

YES

**

Is there voltage across

DOB contacts on

TMR2?

NO

YES

Correct wiring to

TMR1.

Check for proper

operation of

airflow switch.

Replace time

delay board.

NO

NOTE: This test to be

made with push to start

switch pressed in.

Is there voltage

across terminals 2A

& 1A of push to

start switch?

NO

**

Is there voltage across

COM and N.O. of

the airflow switch?

NO

Tested with the start switch pressed in.

**

YES

NOTE: The N.O. contact is closed in the rest

position due to the physical mounting

of the switch.

YES

Replace push to

start switch.

Adjust the airflow

switch or replace if

inoperative.

CONTINUED

ON NEXT

PAGE.

YES

NO

**

Is there voltage across

terminals 7 & 8 of

CR2 relay?

YES

Is there voltage across

terminals 5 & 3 on

the CR2 relay?

NO

**

Is there voltage across

coils B & A of the

motor control relay?

NO

YES

NO

Correct wiring

between CR2

relay and

airflow switch.

Replace CR2

relay.

Correct wiring

between motor

control relay

and airflow

switch.

T042D

70284701 71

Section 7 Electronic Control Troubleshooting

WILL NOT RUN – GAS – MANUAL TIMER

(Sheet 2 of 2)

**

Is there voltage across

terminal 7 & 4 of the motor control relay?

YES

Does the fan motor

run?

NO

Replace the fan

motor.

NO

Is there voltage at terminal 5 on the

motor control relay to

to supply neutral?

YES

Is there voltage across

terminal 5 & 8 of the

motor control relay?

NO

Is there voltage across

terminals 1 & 4 of

fan motor?

NO

YES

NO

Replace motor

control relay.

Correct wiring

between terminal 5

and supply voltage.

Replace motor

control relay.

Correct wiring

between fan

motor and contact

8 on the motor

control relay.

YES

Is there

voltage across

terminals 3 & 5 of

the fan motor

centrifugal switch with

the fan motor

running?

NO

Is there voltage to

terminal 6 on the

motor control relay and

supply neutral?

YES

Is there voltage across

terminal 6 & 9 of the motor control relay?

NO

Is there voltage at terminals 1 & 4 of

the cylinder motor?

YES

Note: Only for non time

delay machines

YES

Replace fan

motor.

Correct wiring

NO

between terminal

6 and power

supply.

YES

Replace motor

control relay.

Correct wiring

between cylinder

NO

motor and contact

9 on the motor

control relay.

YES

Tested with the start switch pressed in.

**

72 70284701

Does the cylinder

motor run?

YES

The cylinder and

fan motors are

operational.

NO

Replace the

cylinder motor.

T043D

74. WILL NOT RUN – GAS – ROTARY COIN DROP

(Sheet 1 of 2)

Single and stack with and

without time delay.

Section 7 Electronic Control Troubleshooting

**

Is there voltage across

terminals 2A & 1A

of push to start

switch?

NO

voltage to transformer

Is there voltage to

COM of the airflow

switch?

YES

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

**

Is there voltage across

COM and N.O. of

the airflow switch?

NO

Is the unit equipped

with a time delay

board?

YES

Tested with start switch

pressed in.

YES

Note: Reference

neutral.

NO

mounting of the switch.

YES

NO

Replace push to

between COM of airflow switch and 1A on start switch.

Adjust the airflow

switch or replace if

start switch.

Correct wiring

inoperative.

**

Is there voltage across

DOB contacts (H1-4

and H1-5) on TMR2?

NO

**

Is there voltage across

terminals 7 & 8 of

CR2 relay?

YES

**

Is there voltage across

terminals 5 & 3 on

the CR2 relay?

NO

**

Is there voltage across

coils B & A of the

motor control relay?

YES

**

Is there voltage across

terminal 7 & 4 of the

motor control relay?

YES

NO

YES

NO

YES

Replace time

delay board.

Correct wiring

between CR2

relay and

airflow switch.

Replace CR2

relay.

Correct wiring

between motor

control relay

and airflow

switch.

Replace motor

control relay.

NO

Is there voltage across

H1-6 & H1-8 on

TMR1?

YES

**

Is there voltage across

terminals H1-4 &

H1-8 on TMR2?

NO

Correct wiring to

TMR1.

Check for proper

operation of

airflow switch

and check wiring.

Is there voltage at

terminal 5 on the

motor control relay?

YES

CONTINUED

NO

Correct wiring

between

terminal 5

and supply

voltage.

ON NEXT

PAGE.

YES

**

Tested with the start switch pressed in.

70284701 73

T088D

Section 7 Electronic Control Troubleshooting

WILL NOT RUN – GAS – ROTARY COIN DROP

(Sheet 2 of 2)

Is there voltage across

terminal 5 & 8 of the

motor control relay?

NO

Is there voltage across

terminals 1 & 4 of

fan motor?

YES

Does the fan motor

run?

YES

Is there voltage

across terminals 3 &

5 of the fan motor centrifugal

switch with the fan

motor running?

YES

NO

YES

Replace motor

control relay.

Correct wiring

between fan

motor and contact

8 on the motor

control relay.

Replace the fan

motor.

Replace fan

motor.

Is there voltage at

terminals 1 & 4 of

the cylinder motor?

YES

Does the cylinder

motor run?

YES

The cylinder and

fan motors are

operational.

NO

Correct wiring

between cylinder

motor and contact

9 on the motor

control relay.

Replace the

cylinder motor.

NO

Is there voltage to

terminal 6 on the

motor control relay?

YES

Is there voltage across

terminal 6 & 9 of the

motor control relay?

NO

YES

Correct wiring

between terminal

6 and power

supply.

Replace motor

control relay.

**

Tested with the start switch pressed in.

T089D

74 70284701

75. WILL NOT RUN – STEAM – MANUAL TIMER

(Sheet 1 of 2)

Section 7 Electronic Control Troubleshooting

Single and stacked units with and without

time delay board.

Is there voltage at

terminal C on the

drying timer?

YES

Is there voltage at terminal B on the

drying timer?

YES

Is there voltage across

terminals 7 and 8 of

CR1 relay?

YES

Is there voltage across

terminal 3 and 5 of

CR1 relay?

NO

NOTE: Make sure drying

timer is in the "on"

position.

NO

YES

Correct wiring

between drying

timer and lint panel

switch.

Replace drying

timer.

Correct the wiring

between CR1 relay

and terminal B on

drying timer.

Replace CR1 relay.

NO

Is the unit equipped

with a time delay

board?

YES

Is there voltage across

H1-6 & H1-8 on

TMR1?

YES

**

Is there voltage across

terminals H1-4 &

H1-8 on TMR2?

YES

**

Is there voltage across

DOB contacts on

TMR2?

NO

YES

Correct wiring to

TMR1.

Check for proper

operation of

airflow switch.

Replace time

delay board.

NO

NOTE: This test to be

made with push to start

switch pressed in.

Is there voltage

across terminals 2A

& 1A of push to

start switch?

NO

NOTE: The N.O. contact is closed in

the rest position due to the physical

**

Is there voltage across

COM and N.O. of

the airflow switch?

NO

Tested with the start switch pressed in.

**

mounting of the switch.

YES

Replace push to

start switch.

Adjust the airflow

switch or replace if

inoperative.

CONTINUED

ON NEXT

PAGE.

YES

NO

**

Is there voltage across

terminals 7 & 8 of

CR2 relay?

YES

Is there voltage across

terminals 5 & 3 on

the CR2 relay?

NO

**

Is there voltage across

B & A of the motor

control relay?

NO

YES

NO

Correct wiring between CR2

relay and

airflow switch.

Replace CR2

relay..

Correct wiring

between motor

control relay

and airflow

switch.

T017D

70284701 75

Section 7 Electronic Control Troubleshooting

WILL NOT RUN – STEAM – MANUAL TIMER

(Sheet 2 of 2)

**

Is there voltage across

terminal 7 & 4 of the

motor control relay?

YES

Does the fan motor

run?

NO

Replace the fan

motor.

NO

Is there voltage at

terminal 5 on the

motor control relay to

to supply neutral?

YES

Is there voltage across

terminal 5 & 8 of the

motor control relay?

NO

Is there voltage across

terminals 1 & 4 of

fan motor?

NO

YES

NO

Replace motor

control relay.

Correct wiring

between terminal

5 and supply

voltage.

Replace motor

control relay.

Correct wiring

between fan

motor and contact

8 on the motor

control relay.

YES

Is there

voltage across

terminals 3 & 5 of

the fan motor

centrifugal switch with

the fan motor

running?

NO

Is there voltage to

terminal 6 on the

motor control relay and

supply neutral?

YES

Is there voltage across

terminal 6 & 9 of the

motor control relay?

NO

Is there voltage at

terminals 1 & 4 of

the cylinder motor?

YES

Note: Only for non time

delay machines

YES

Replace fan

motor.

Correct wiring

NO

between terminal

6 and power

supply.

YES

Replace motor

control relay.

Correct wiring

NO

between cylinder

motor and contact

9 on the motor

control relay.

YES

Tested with the start switch pressed in.

**

76 70284701

Does the cylinder

motor run?

YES

The cylinder and

fan motors are

operational.

NO

Replace the

cylinder motor.

T018D

76. WILL NOT RUN – STEAM – ROTARY COIN DROP

(Sheet 1 of 2)

Single and stack

with and without time delay.

**

Tested with start switch

pressed in and vend

**

Is there voltage across

terminals 2A & 1A

of push to start

switch?

NO

Is there voltage to

COM of the airflow

switch?

satisfied.

YES

Note: Reference

voltage to transformer

neutral.

NO

Replace push to

start switch.

Correct wiring

between COM of airflow switch and 1A on start switch.

Section 7 Electronic Control Troubleshooting

**

Is there voltage across

DOB contacts on

TMR2?

NO

**

Is there voltage across

terminals 7 & 8 of

CR2 relay?

YES

NO

Replace time

delay board.

Correct wiring

between CR2

relay and

airflow switch.

YES

NOTE: The N.O. contact is closed in the rest

position due to the physical mounting

**

Is there voltage across

COM and N.O. of

the airflow switch?

NO

Is the unit equipped

with a time delay

board?

YES

Is there voltage across

H1-6 & H1-8 on

TMR1?

YES

of the switch.

YES

NO

Adjust the airflow

switch or replace if

inoperative.

Correct wiring to

TMR1.

**

Is there voltage across

terminals 5 & 3 on

the CR2 relay?

NO

**

Is there voltage across

B & A of the motor

control relay?

YES

**

Is there voltage across

terminal 7 & 4 of the motor control relay?

NO

Is there voltage at

terminal 5 on the

motor control relay?

YES

NO

YES

NO

Replace CR2

relay.

Correct wiring

between motor

control relay

and airflow

switch.

Replace motor

control relay.

Correct wiring

between

terminal 5

and supply

voltage.

**

Is there voltage across

terminals H1-4 &

H1-8 on TMR2?

YES

70284701 77

NO

Check for proper

operation of

airflow switch and

check wiring.

**

Tested with the start switch pressed in.

YES

CONTINUED

ON NEXT

PAGE.

T064D

Section 7 Electronic Control Troubleshooting

WILL NOT RUN – STEAM – ROTARY COIN DROP

(Sheet 2 of 2)

Is there voltage across

terminal 5 & 8 of the

motor control relay?

NO

Is there voltage across

terminals 1 & 4 of

fan motor?

YES

Does the fan motor

run?

YES

Is there

voltage across

terminals 3 & 5 of

the fan motor

centrifugal switch with

the fan motor

running?

YES

NO

Only for units without

YES

Replace motor

control relay.

Correct wiring

NO

time delay boards.

between fan

motor and contact

8 on the motor

control relay.

Replace the fan

Replace fan

motor.

Is there voltage at terminals 1 & 4 of

the cylinder motor?

YES

Does the cylinder

motor run?

YES

The cylinder and

fan motors are

operational.

NO

Correct wiring

between cylinder

motor and contact

9 on the motor

control relay.

Replace the

cylinder motor.

NO

Is there voltage to terminal 6 on the

motor control relay?

YES

Is there voltage across

terminal 6 & 9 of the

motor control relay?

NO

YES

Correct wiring

between terminal

6 and power

supply.

Replace motor

control relay.

**

Tested with the start switch pressed in.

T065D

78 70284701

77. WILL NOT HEAT – ELECTRIC – MANUAL TIMER

(Sheet 1 of 2)

With and without time delay board.

Single and stacked units. Single and

NOTE: The following tests are conducted with

the heat timer in the "ON" position with the

machine running and calling for heat. Voltage

checks are referenced to transformer neutral.

Is there voltage across

terminals 1 & 6 of

the temp control bd?

NO

three phase power supply.

Section 7 Electronic Control Troubleshooting

Is there

voltage at

airflow switch

N.C. terminal to

transformer

neutral?

Replace inoperative

NO

switch or correct

airflow vane operation.

YES

Is there voltage across

terminals 5 & 6 of

the temp control bd?

NO

Is the thermistor shorted or open?

NO

Is temperature

selection switch

shorted or open?

NO

Replace the

temperature

control board.

YES

voltage to

terminal 3 of

fan motor?

Replace thermistor.

Replace selection

switch.

Is there

YES

Correct wiring

NO

between fan motor

terminal 3 and CR1 terminal 4.

YES

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

YES

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

YES

Is unit equipped with

time delay board?

NO

Is there voltage from terminal 6 on CR2 to transformer neutral?

YES

Correct wiring between

NO

airflow switch and

terminal 6 on CR1.

NO

Replace CR1.

Correct wiring

NO

between terminal 6

on CR2 to terminal

4 on CR1.

CONTINUED

ON NEXT

PAGE

70284701 79

Is there voltage

at terminal 3 & 5

of fan motor?

Correct wiring between motor terminal 5 and

temp control

board terminal 1.

YES

NO

Replace fan motor.

Is there voltage from terminal 4 on CR2 to transformer neutral?

YES

Correct wiring

between CR2

terminal 4 &

terminal 1 on

temp control

board.

NO

Replace CR2.

T054D

Section 7 Electronic Control Troubleshooting

WILL NOT HEAT – ELECTRIC – MANUAL TIMER

(Sheet 2 of 2)

Note: Voltage checks are referenced to

transformer neutral.

Is there voltage to the

input side of the

cabinet limit?

YES

Is there voltage to the

output side of the

cabinet limit?

YES

Is there voltage to the

input side of the stove

limit?

YES

Is there voltage to the

output side of the stove

limit?

NO

Correct wiring

between cabinet

limit and temp

control board.

Replace the cabinet

limit.

Correct wiring

between stove limit

and cabinet limit.

Replace the stove

limit.

Do the elements

produce heat?

YES

UNIT

OPERATIONAL

NO

Replace elements.

YES

Is there voltage across

HC1 & HC2

element contactor

coils?

YES

Is there voltage across

the elements?

YES

NO

Correct wiring

between element

contactor coils and

stove limit.

Check wiring

between elements,

contactors and

supply. Correct if

necessary.

T055D

80 70284701

78. WILL NOT HEAT – ELECTRIC

(Sheet 1 of 2)

Section 7 Electronic Control Troubleshooting

Note: Tests are conducted with unit running

and calling for heat.

All voltage checks are referenced to

transformer neutral.

Is there voltage on

FS-2 of EDC control?

YES

Replace

thermistor.

Is there voltage

on FS-1 of

EDC control?

YES

Is there voltage on

COM of airflow

switch?

YES

NO

thermistor

operational?

NO

Correct wiring

between FS-2 and

COM of lint drawer.

NONO

Is the

Correct wiring

between COM of

airflow switch and

Single and stacked units with single and three

Replace EDC

control.

YES

FS-1 of EDC

control.

phase supply.

Is there voltage on

terminal 3 of fan

motor centrifugal

switch?

YES

Is there voltage at

terminal 5 of fan

motor centrifugal

switch?

YES

Is there voltage to the

input side of the

cabinet limit?

YES

NO

Correct wiring

between terminal

3 of fan motor

centrifugal switch

and terminal 4 of

motor control relay.

Replace fan motor.

Correct wiring

between cabinet

limit and terminal

5 of fan motor

centrifugal switch.

Is there voltage at

N.C. terminal of

airflow switch?

YES

Is there voltage on terminal 7 of motor

control relay?

YES

Is there voltage at

terminal 4 of motor

control relay?

YES

NO

Check for proper

function of airflow

switch and replace

if necessary.

Correct wiring

between terminal 7

on motor control

relay and N.C.

terminal on airflow

switch.

Replace motor

control relay.

Is there voltage at the

output of the cabinet

limit?

YES

Is there voltage to the input side of the stove

limit?

YES

Continued on next

page.

NO

Replace cabinet

limit.

Correct wiring

between stove limit

and cabinet limit.

T034D

70284701 81

Section 7 Electronic Control Troubleshooting

WILL NOT HEAT – ELECTRIC

(Sheet 2 of 2)

Is there voltage to the

output side of the stove

limit?

YES

Is there voltage across

coils HC1 & HC2?

YES

Is there voltage across

the heating elements?

YES

Do the elements

produce heat?

NO

Replace the stove

limit.

Correct wiring to

the coils of HC1

and HC2.

Correct wiring

between elements

and supply. Replace

HC1 and or HC2

if necessary

Replace elements.

YES

Unit operational.

T035D

82 70284701

Section 7 Electronic Control Troubleshooting

79. WILL NOT HEAT – ELECTRIC – ROTARY COIN DROP (With and without time delay board)

(Sheet 1 of 2)

Single and stacked tumblers with and without time delay.

Single and three phase

units.

Is there voltage across across terminals 1 &

6 of the temp

control board?

NO

Is there voltage at

airflow switch N.C.

terminal to transformer

neutral?

Adjust the airflow

NO

switch or replace if

inoperative.

YES

Is there voltage across across terminals 5 &

6 of the temp

control board?

NO

Is the thermistor

shorted or open?

NO

Is temperature

selection switch

shorted or open?

NO

Replace the

temperature

control board.

Is there voltage on terminal 3 of fan motor to transformer

neutral?

YES

Replace thermistor.

YES

Replace selection

NO

switch.

Correct wiring

between terminal

3 of fan motor

and N.C. terminal

on switch B.

YES

Is there voltage at

COM on switch B to

transformer neutral?

YES

Is there voltage from

N.C. on switch B to

transformer neutral?

YES

Is the unit equipped

with a time delay

board?

NO

Is there voltage from terminal 6 on CR2 to transformer neutral?

YES

NO

between airflow

switch and COM on

NO

Replace switch B.

NO

between terminal 6 on CR2 to terminal

Correct wiring

switch B.

Correct wiring

N.C. on switch B.

With fan motor

running is there voltage

from terminal 5 to

transformer neutral?

YES

Is there voltage on

terminal 1 of temp

board to transformer

neutral?

YES

CONTINUED

ON NEXT

PAGE

70284701 83

Power supply to

temp control board

is good.

NO

Replace fan motor.

Correct wiring

between terminal

NO

1 of temp board

to terminal 5 of fan motor.

Is there voltage from terminal 4 on CR2 to transformer neutral?

YES

Correct wiring

between terminal

4 on CR2 & terminal 1 on temp control

board.

NO

Replace CR2.

T077D

Section 7 Electronic Control Troubleshooting

WILL NOT HEAT – ELECTRIC – ROTARY COIN DROP (With and without time delay board)

(Sheet 2 of 2)

Note: Voltage checks are referenced to

transformer neutral.

Is there voltage to the

input side of the

cabinet limit?

YES

Is there voltage to the

output side of the

cabinet limit?

YES

Is there voltage to the

input side of the stove

limit?

YES

Is there voltage to the

output side of the stove

limit?

NO

Correct wiring

between cabinet

limit and temp

control board.

Replace the cabinet limit.

Correct wiring

between stove limit

and cabinet limit.

Replace the stove

limit.

Do the elements

produce heat?

YES

UNIT

OPERATIONAL

NO

Replace elements.

YES

Is there voltage across

the coils of HC1 &

HC2?

YES

Is there voltage across

the elements?

YES

NO

Correct the wiring

to the coils.

Check the wiring

between elements,

contactors and

supply. Correct if

necessary.

T078D

84 70284701

Section 7 Electronic Control Troubleshooting

80. WILL NOT HEAT – ELECTRIC/GAS – OPL MICROPROCESSOR

(Sheet 1 of 3)

Note: Testing conducted with unit running

Single and three phase supply.

Reference voltage to

transformer neutral

Is there voltage at

terminal 5 on OPL

Micro?

terminal 3.

YES

and calling for heat.

Continued on next

page column 2.

Is there voltage across

terminals 2 & 3 of

transformer secondary?

NO

Replace

transformer.

NO

Is the thermister

operating properly?

YES

Reference voltage to

supply neutral.

Is power supplied to

unit?

YES

Is there voltage to input

of primary fuse(s)?

YES

Test conducted with unit

running and calling for heat.

NO

Replace thermister.

NO

Connect supply and

run unit.

NO

Correct wiring

between primary

fuse and supply.

YES

Note: Reference voltage to

transformer secondary neutral

Is there voltage to input

of secondary fuse?

YES

Is there voltage to

output of secondary

fuse?

YES

Is there voltage to

N.O. terminal of door

switch?

YES

terminal 3.

NO

Correct wiring

between secondary

fuse and

transformer.

Replace secondary

fuse.

Correct wiring

between N.O.

terminal of door

switch and

secondary fuse.

Is there voltage to

output of primary

fuse(s)?

YES

Is

there voltage across

terminals 1 & 2 on

primary of

transformer?

YES

70284701 85

NO

between transformer

Change primary

fuse.

Correct wiring

and primary fuse.

With door closed is

there voltage to COM

of door switch?

YES

Is there voltage to

N.O. of lint panel

switch?

YES

Continued on next

page Column 1.

NO

Check for proper

operation, replace

door switch if

necessary.

Correct wiring

between N.O. of

lint panel switch

and COM of door

switch.

T010D

Section 7 Electronic Control Troubleshooting

WILL NOT HEAT – ELECTRIC/GAS – OPL MICROPROCESSOR

(Sheet 2 of 3)

Column 1

Is there voltage to COM of lint panel

switch with lint panel

closed?

YES

Is there voltage at

terminal 8 of OPL

Micro?

YES

Is there voltage to

terminal 13 of OPL

Micro?

YES

Is there voltage at

terminal 6 of OPL

Micro?

YES

Replace OPL Micro.

Is there voltage to

terminal 14 on motor

control relay?

YES

NO

Check for proper

operation and

replace lint panel

switch if necessary.

Correct wiring

between terminal

8 of OPL Micro

and COM of lint

panel switch.

Replace OPL Micro.

Correct wiring

between terminal

6 & 13 on OPL

Micro.

Correct wiring

between terminal

14 on motor

control relay and

N.C. terminal of

airflow switch.

Three phase

Column 2

Is there voltage at

COM of airflow

switch?

Is there voltage at

N.C. terminal of

airflow switch?

Is the unit supplied with

single phase or three

phase power?

there voltage at

terminal 7 of motor control relay for OM models or terminal 8

for RM

models?

there voltage at

terminal 4 of motor control relay for OM models or terminal 6

for RM

models?

Is there voltage at

terminal 3 of fan

motor centrifugal

switch?

conducted with the unit running

YES

single phase

Is

YES

Is

YES

The following tests are

and calling for heat.

NO

Correct wiring

between COM &

Check for proper

operation and

Correct wiring

between terminal

control relay and

N.C. of airflow

Replace motor

Correct wiring

between fan motor

centrifugal switch and motor control

OPL Micro.

replace if

necessary.

7/8 of motor

switch.

control relay.

relay.

Is there voltage across

terminals 14 & 13 of motor control relay?

YES

Replace motor

control relay.

86 70284701

NO

YES

Is there voltage at

terminal 5 of fan

motor centrifugal

switch?

YES

Continued on next

page.

NO

Replace fan motor.

T011D

Section 7 Electronic Control Troubleshooting

WILL NOT HEAT – ELECTRIC/GAS – OPL MICROPROCESSOR

(Sheet 3 of 3)

Continued from column 2 of

previous page.

Is there voltage to the

input of the cabinet

limit?

YES

Is there voltage to

output of cabinet limit?

YES

Is there voltage to input

of stove limit?

YES

Is there voltage to the

output side of the stove

limit?

YES

NO

Correct wiring

between cabinet

limit and terminal

5 of fan motor

centrifugal switch.

Replace cabinet

limit.

Correct wiring

between stove limit

and cabinet limit.

Replace stove limit.

Is there voltage to

terminal 1 of ICM

board?

YES

Is there voltage across

the coils of the gas

valve?

YES

Is there gas flow

through the valve?

YES

NO

Does the ignitor spark?

NO

YES

Replace ICM board.

Correct wiring to

gas valve coils.

Replace the coils or

complete gas valve.

Unit is operational.Is there a flame?

Check gas

pressures and

adjust if necessary.

NO

Is the unit equipped

with gas heat or

electric heat?

GAS

Is there voltage to

terminal 2 of ICM

board?

YES

70284701 87

ELECTRIC

NO

Correct wiring

between ICM board

and stove limit.

UNIT

OPERATIONAL.

Replace igniter or

ignition cable.

Is there voltage across

HC1 & HC2 coils?

YES

Do the elements

produce heat?

YES

NO

Correct the wiring

to the HC1 and/or

HC2 coils.

Correct wiring

between supply,

contacts and

elements. Replace

contactors and/or

elements if necessary.

T012D

Section 7 Electronic Control Troubleshooting

81. WILL NOT HEAT – GAS – EDC MODELS

(Sheet 1 of 2)

Note: Tests are conducted with unit

running and calling for heat.

All voltage checks are referenced

to transformer neutral.

Is there voltage on

FS-2 of EDC control?

YES

Replace

thermistor.

Is there voltage

on FS-1 of

EDC control?

YES

Is there voltage on

COM of airflow

NO

switch?

YES

Single and stacked

NO

Is the

thermistor

operational?

NO

units.

Correct wiring

between FS-2 and

COM of lint

panel switch.

Replace EDC

control.

YES

Correct wiring

between COM of

airflow switch and

FS-1 of EDC

control.

Is there voltage on

terminal 3 of fan

motor centrifugal

switch?

YES

Is there voltage across

terminals 3 & 5 of

fan motor centrifugal

switch?

NO

Is there voltage to the

input side of the

cabinet limit?

YES

NO

YES

NO

Correct wiring

between terminal

3 of fan motor

centrifugal switch

and terminal 4 of

motor control relay.

Replace fan motor.

Correct wiring

between cabinet

limit and terminal

5 of fan motor

centrifugal switch.

Is there voltage across

COM & N.C. terminal

of airflow switch?

NO

Is there voltage on

terminal 7 of motor

control relay?

YES

Is there voltage across

terminals 7 & 4 of

motor control relay?

NO

YES

NO

YES

Check for proper

function of airflow

switch and replace

if necessary.

Correct wiring

between terminal

7 on motor

control relay and

N.C. terminal on

airflow switch.

Replace motor

control relay.

Is there voltage across

cabinet limit?

NO

Is there voltage to the

input side of the stove

limit?

YES

Continued on next

page.

YES

NO

Replace cabinet

limit.

Correct wiring

between stove limit

and cabinet limit.

TMB1833S

88 70284701

WILL NOT HEAT – GAS – EDC MODELS

(Sheet 2 of 2)

Section 7 Electronic Control Troubleshooting

Is there voltage to the

output side of the stove

limit?

YES

Is there voltage to

terminal 2 of the ICM

board?

YES

Is there voltage at terminal 1 of ICM

board?

YES

Is there voltage across

the coils of the gas

valve?

NO

Replace the stove

limit.

Correct wiring

between terminal

2 of ICM board

and stove limit.

Replace ICM board.

Correct wiring

between gas valve

and ICM board.

NO

YES

Unit operational.Is there a flame?

YES

Is there gas flow

through the gas valve?

YES

Does the igniter spark?

YES

NO

Replace gas valve

coils or complete

gas valve.

Replace high voltage ignition cable or igniter.

T033D

70284701 89

Section 7 Electronic Control Troubleshooting

82. WILL NOT HEAT – GAS – MANUAL TIMER

(Sheet 1 of 2)

NOTE: The following tests are conducted with

the Heat Timer in the "ON" position with the

machine running and calling for heat. Voltage

checks are referenced to transformer neutral.

Is there voltage across

terminals 1 & 6 of

the temp control bd?

YES

Is there voltage across

terminals 5 & 6 of

the temp control bd?

NO

Is the thermistor

shorted or open?

NO

YES

Single and stacked units with and without time

Replace thermistor.

delay boards.

YES

Is

there voltage at

airlow switch

N.C. terminal to

transformer

neutral?

YES

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

YES

Is there voltage from

terminal 4 on CR1 to

transformer neutral?

YES

Is unit equipped with

time delay board?

Replace inoperative

NO

switch or correct

airflow vane operation.

Correct wiring between

NO

airlow switch and

terminal 6 on CR1.

NO

Replace CR1.

Is the temperature

selection switch

shorted or open?

temperature

control board.

CONTINUED

ON NEXT

PAGE

NO

Replace the

YES

temp control board

Replace selection

Is there

voltage to

terminal 3 of

fan motor?

YES

Is

there voltage

across terminal

3 & 5 of fan

motor?

NO

Correct wiring

between motor

terminal 5 and

terminal 1.

switch.

NO

YES

Correct wiring

between fan motor

terminal 3 and CR1

terminal 4.

Replace fan motor.

NO

Is there voltage from terminal 6 on CR2 to transformer neutral?

YES

Is there voltage from terminal 4 on CR2 to transformer neutral?

YES

Correct wiring

between CR2

terminal 4 &

terminal 1 on

temp control

board.

NO

Correct wiring between terminal 6 on CR2 to terminal

4 on CR1.

Replace CR2.

T044D

90 70284701

WILL NOT HEAT – GAS – MANUAL TIMER

(Sheet 2 of 2)

Note: Voltage checks are referenced to

transformer neutral.

Section 7 Electronic Control Troubleshooting

Is there voltage to the

input side of the

cabinet limit?

YES

Is there voltage to the

output side of the

cabinet limit?

YES

Is there voltage to the

input side of the stove

limit?

YES

Is there voltage to the

output side of the stove

limit?

NO

Correct wiring

between cabinet

limit and temp

control board.

Replace the cabinet

limit.

Correct wiring

between stove limit

and cabinet limit.

Replace the stove

limit.

NO

Is there voltage across

the coils of the gas

valve?

YES

Is there gas flow

through the gas valve?

YES

Does the igniter spark?

YES

Is there a flame?

NO

between gas valve

NO

Correct wiring

and ICM board.

Replace gas valve

or gas valve coils.

Replace high

voltage cable or

igniter.

YES

Is there voltage across

terminals 2 & 3 of

ICM board?

YES

Is there voltage across

terminals 1 & 3 of

the ICM board?

YES

NO

Correct wiring

between ICM board

and stove limit.

Replace ICM board

YES

UNIT OPERATIONAL

TMB1834S

70284701 91

Section 7 Electronic Control Troubleshooting

83. WILL NOT HEAT – GAS – ROTARY COIN DROP

(Sheet 1 of 2)

Single and stacked

tumblers with

and without time delay.

YES

Is there voltage across

terminals 1 & 6 of

the temp control bd?

YES

Is there voltage across

terminals 5 & 6 of

the temp control bd?

NO

Is the thermistor

shorted or open?

NO

Is temperature

selection switch

shorted or open?

NO

Replace the

temperature

control board.

Is there voltage on

terminal 3 of fan motor

to transformer

neutral?

YES

NO

YES

Replace thermistor.

YES

NO

Replace selection

switch.

Correct wiring

between terminal

3 of fan motor

and N.C. terminal

on switch B.

YES

Is there voltage at

airflow switch N.C.

terminal to transformer

neutral?

YES

Is there voltage at

COM on switch B to

transformer neutral?

YES

Is there voltage from

N.C. on switch B to

transformer neutral?

YES

Is the unit equipped

with a time delay

board?

NO

Is there voltage from

terminal 6 on CR2 to

transformer neutral?

YES

Replace inoperative

NO

switch or correct

airflow vane operation.

Correct wiring

NO

between airflow

switch and COM on

switch B.

NO

Replace switch B.

Correct wiring

NO

between terminal 6

on CR2 to terminal

N.C. on switch B.

With fan motor

running is there voltage

from terminal 5 to

transformer

neutral?

YES

Is there voltage on

terminal 1 of temp

board to transformer

neutral?

YES

CONTINUED

ON NEXT

PAGE

92 70284701

Power supply to

temp control

board is good.

NO

Replace fan motor.

Correct wiring

between terminal

NO

1 of temp board

to terminal 5 of fan motor.

Is there voltage from

terminal 4 on CR2 to

transformer neutral?

YES

Correct wiring

between terminal

4 on CR2 &

terminal 1 on

temp control

board.

NO

Replace CR2.

T090D

WILL NOT HEAT – GAS – ROTARY COIN DROP

(Sheet 2 of 2)

Note: Voltage checks are referenced to

transformer neutral.

Section 7 Electronic Control Troubleshooting

Is there voltage to the

input side of the

cabinet limit?

YES

Is there voltage to the

output side of the

cabinet limit?

YES

Is there voltage to the

input side of the stove

limit?

YES

Is there voltage to the

output side of the stove

limit?

NO

Correct wiring

between cabinet

limit and temp control board.

Replace the cabinet limit.

Correct wiring

between stove limit

and cabinet limit.

Replace the stove

limit.

Is there voltage across

through the gas valve?

Does the igniter spark?

NO

the coils of the gas

valve?

YES

Is there gas flow

YES

Is there a flame?

NO

between gas valve

NO

Correct wiring

and ICM board.

Replace gas valve

coils or complete

gas valve.

Replace high

voltage ignition

cable or igniter.

YES

Is there voltage across

terminals 2 & 3 of

the ICM board?

YES

Is there voltage across

terminals 1 & 3 of

the ICM board?

YES

NO

Correct wiring

between ICM

board and stove

limit or neutral.

Replace the ICM

board.

YES

UNIT

OPERATIONAL

T091D

70284701 93

Section 7 Electronic Control Troubleshooting

84. WILL NOT HEAT – STEAM – EDC MODELS

(Sheet 1 of 2)

Note: Tests are conducted with unit running

and calling for heat.

All voltage checks are referenced to

transformer neutral.

Is there voltage on

FS-2 of EDC control?

NO

Single and stacked

units.

Correct wiring

between FS-2 and

COM of lint drawer.

Is there voltage on

terminal 3 of fan

motor centrifugal

switch?

NO

Correct wiring

between terminal 3

of fan motor

centrifugal switch

and terminal 4 of

motor control relay.

Is there voltage

on FS-1 of

EDC control?

YES

Is there voltage on

COM of airflow

switch?

Is there voltage across

COM & N.C. terminal

of airflow switch?

YES

NO

Replace

thermistor.

Is the

thermistor

operational?

NO

YES

Replace EDC

control.

NO

YES

Correct wiring

between COM of

airflow switch and

FS-1 of EDC

control.

Check for proper

function of airflow

switch and replace if

necessary.

YES

Is there voltage across

terminals 3 & 5 of

fan motor centrifugal

switch?

NO

Is there voltage to the

input side of the

cabinet limit?

YES

Is there voltage across

cabinet limit?

NO

YES

NO

YES

Replace fan motor.

Correct wiring

between cabinet

limit and terminal 5

of fan motor

centrifugal switch.

Replace cabinet

limit.

Is there voltage on

terminal 7 of motor

control relay?

YES

Is there voltage across

terminals 7 & 4 of

motor control relay?

NO

94 70284701

NO

YES

Correct wiring

between terminal 7

on motor control

relay and N.C.

terminal on airflow

switch.

Replace motor

control relay.

Is there voltage to the input side of the stove

limit?

YES

Continued on next

page.

NO

Correct wiring

between stove limit

and cabinet limit.

T096D

WILL NOT HEAT – STEAM – EDC MODELS

(Sheet 2 of 2)

Section 7 Electronic Control Troubleshooting

Is there voltage to the

output side of the stove

limit?

YES

Is there voltage across

steam valve coil?

YES

Does steam valve

operate properly?

YES

NO

Replace the stove

limit.

Correct wiring to

steam valve coil.

Repair or replace

steam valve.

Is heat produced?

YES

Unit operational.

NO

Check for proper

steam supply.

Correct if necessary.

T097D

70284701 95

Section 7 Electronic Control Troubleshooting

85. WILL NOT HEAT – STEAM – MANUAL TIMER

(Sheet 1 of 2)

NOTE: The following tests are conducted with

the Heat Timer in the "ON" position with the

machine running and calling for heat. Voltage

checks are referenced to transformer neutral.

Is there voltage across

terminals 1 & 6 of

the temp control bd?

YES

Is there voltage across

terminals 5 & 6 of

the temp control bd?

NO

Is the thermistor

shorted or open?

NO

YES

Single and stacked units with and without time

delay boards, manual timers.

Replace thermistor.

YES

Is there voltage at

airflow switch N.C.

terminal to transformer

neutral?

YES

Is there voltage at

terminal 6 on CR1 to

transformer neutral?

YES

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

YES

Is unit equipped with

time delay board?

Adjust the airflow

NO

switch or replace if

NO

terminal 6 on CR1.

NO

inoperative.

Correct wiring

between airflow

switch and

Replace CR1.

Is temperature

selection switch

shorted or open?

temperature

control board.

CONTINUED

ON NEXT

PAGE

NO

Replace the

YES

Replace selection

Is there

voltage to

terminal 3 of

fan motor?

YES

Is there voltage across terminal

3 & 5 of fan

motor?

NO

Correct wiring between motor terminal 5 and

temp control

board terminal 1.

switch.

NO

YES

Correct wiring

between fan motor

terminal 3 and

CR1 terminal 4.

Replace fan motor.

NO

Is there voltage from terminal 6 on CR2 to transformer neutral?

YES

Is there voltage from terminal 4 on CR2 to transformer neutral?

YES

Correct wiring

between CR2

terminal 4 & terminal 1 on temp control

board.

NO

between terminal 6

on CR2 to terminal

NO

Correct wiring

4 on CR1.

Replace CR2.

T019D

96 70284701

WILL NOT HEAT – STEAM – MANUAL TIMER

(Sheet 2 of 2)

Note: Voltage checks are referenced to

transformer neutral.

Section 7 Electronic Control Troubleshooting

Is there voltage to the

input side of the

cabinet limit?

YES

Is there voltage to the

output side of the

cabinet limit?

YES

Is there voltage to the

input side of the stove

limit?

YES

Is there voltage to the

output side of the stove

limit?

NO

Correct wiring

between cabinet

limit and temp

control board.

Replace the cabinet

limit.

Correct wiring

between stove limit

and cabinet limit.

Replace the stove

limit.

Is heat produced?

YES

UNIT OPERATIONAL

Check for proper

NO

steam supply.

Correct if necessary.

YES

Is there voltage across

the coil of the steam

valve?

YES

Do the steam valves

operate properly?

YES

NO

Correct wiring to

the steam valve.

Replace steam

valve.

T020D

70284701 97

Section 7 Electronic Control Troubleshooting

86. WILL NOT HEAT – STEAM – OPL MICROPROCESSOR

(Sheet 1 of 3)

Testing conducted with unit running and calling for heat.

Reference voltage to

transformer neutral

terminal 3.

Is there votlage at

terminal 5 on OPL

Micro?

YES

Continued on next

page column 2.

Is there voltage across

terminals 2 & 3 of

transformer

secondary?

NO

Replace

transformer.

NO

Is the thermister

operating properly?

YES

Reference voltage to

supply neutral.

Is power supplied to

unit?

YES

Is there voltage to input

of primary fuse(s)?

YES

NO

Replace thermister.

Connect supply

and run unit.

Correct wiring

between primary

fuse and supply.

YES

Note: Reference voltage to

transformer secondary neutral

Is there voltage to input

of secondary fuse?

YES

Is there voltage to

output of secondary

fuse?

YES

Is there voltage to

N.O terminal of door

switch?

YES

terminal 3.

NO

Correct wiring

between secondary

fuse and

transformer.

Replace secondary

fuse.

Correct wiring between N.O.

terminal of door

switch and

secondary fuse.

Is there voltage to

output of primary

fuse(s)?

YES

Is

there voltage across

terminals 1 & 2 on

primary of

transformer?

YES

98 70284701

NO

between transformer

Change primary

fuse.

Correct wiring

and primary fuse.

With door closed is

there voltage to COM

of door switch?

YES

Is there voltage to

N.O. of lint panel

switch?

YES

Continued on next

page column 1.

NO

Check for proper

operation, replace

door switch if

necessary.

Correct wiring

between N.O. of

lint panel switch

and COM of door

switch.

T003D

Primus D11, D15, D13 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual