M411429
47
Section 3 Troubleshooting
To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the tumbler before servicing.
• Close gas shut-off valve to gas tumbler before servicing.
• Close steam valve to steam tumbler before servicing.
• Never start the tumbler with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the tumbler is properly grounded.
W002
WARNING
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
51. CD MODELS: NO HEAT WITH VEND SATISFIED AND UNIT RUNNING
120 Volt/60 Hertz/1 Phase and 240 Volt/60 Hertz/1 Phase Gas Nonreversing Models
Step Problem
If No, then
1
Is there voltage on red wire of the motor?
If yes, continue to next step.
Replace motor.
2
Is there voltage to the input of the cabinet high limit?
If yes, continue to next step.
Correct wiring between cabinet high limit and motor.
3
Is there voltage to the output of the cabinet high limit?
If yes, continue to next step.
Check for proper operation. Replace if necessary.
4
Is there voltage to the COM terminal of the airflow switch?
If yes, continue to next step.
Correct wiring between airflow switch and cabinet high
limit.
5
Is there voltage to the N.O. terminal of the airflow switch?
If yes, continue to next step.
Check for proper operation and airflow. Replace switch
if necessary.
6
Is there voltage to the input side of the stove high limit
thermostat? If yes, continue to next step.
Correct wiring between stove limit and airflow switch.
7
Is there voltage to the output side of the stove high limit
thermostat? If yes, continue to next step.
Check for proper operation and airflow. Replace stove
high limit if necessary.
8
Is there voltage to the N.C. terminal of switch B on the coin
drop? If yes, continue to next step.
Correct wiring between switch B and stove high limit.
9
Is there voltage to the COM terminal of switch B?
If yes, continue to next step.
Check for proper operation of coin drop. Replace switch
B if necessary.
10
Is there voltage to the input side of the adjustable
thermostat? If yes, continue to next step.
Correct wiring between switch B and thermostat.
11
Is there voltage to the output side of the adjustable
thermostat? If yes, continue to next step.
Replace thermostat.
12
Is there voltage to L1 of the ignition control board (IEI
board)? If yes, continue to next step.
Correct wiring between ignition control board and
thermostat.
13
Does the igniter spark? If yes, continue to next step.
Check for proper gap on igniter and check for proper
resistance of high voltage lead.† Replace lead if
necessary.
14
Is there voltage across V1 and V2 of the IEI board?
If yes, continue to next step.
Replace IEI board.
15
Is there voltage across the coils of the gas valve?
If yes, continue to next step.
Correct wiring between gas valve and IEI board.
16
Is there a flame? If yes, unit is operational.
Continue to next step.
17
Is there gas pressure on the output side of the gas valve?
If yes, continue to next step.
Replace gas valve.
18
Check for proper gas pressure. 3.5 water column inches for
Natural Gas, 10.5 W.C.I. for L.P. Gas.
† Proper gaps for igniter: 5/16 above burner and 5/32 between electrode and grounding tab. The proper resistance of the high
voltage lead is between 5,000 Ohms and 25,000 Ohms.