Service manual

M411429 33
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
37. CE OM MODELS: NO HEAT WITH CYCLE SELECTED, UNIT RUNNING AND CALLING FOR
HEAT
460-480 Volt/60 Hertz/3 Phase and 208-240 Volt/60 Hertz/3 Phase Reversing and Nonreversing
Step Problem If No, then
1 Is there voltage at H2-13? If yes, continue to next step. Replace Micro.
2 Is there voltage at H2-6? If yes, continue to next step. Correct wiring between H2-6 and H2-13.
3 Is there voltage at H2-5? If yes, continue to next step. Check for proper thermistor operation. Replace micro if
necessary.
4 Is there voltage to terminal 14 of the motor relay? If yes,
continue to next step.
Correct wiring between motor relay and micro.
5 Is there voltage to terminal 13 of the motor relay? If yes,
continue to next step for 1 phase units, Step 22 for 3 phase
units.
Replace motor relay.
6 Is there voltage to the fan motor switch? If yes, continue
to next step.
Correct wiring between motor switch and motor relay.
7 Is there voltage at the output of the fan motor switch.
If yes, continue to next step.
Replace fan motor.
8 Is there voltage to the input of the cabinet limit? If yes,
continue to next step.
Correct wiring between cabinet limit and fan motor.
9 Is there voltage to the output of the cabinet limit? If yes,
continue to next step.
Check for proper airflow. Replace cabinet limit.
10 Is there voltage to the COM terminal of the airflow
switch? If yes, continue to next step.
Correct wiring between airflow switch and cabinet limit.
11 Is there voltage to the N.O. terminal of the airflow switch?
If yes, continue to next step.
Check for proper airflow. Replace airflow switch.
12 Is there voltage to the input of the stove limit? If yes,
continue to next step.
Correct wiring between stove limit and airflow switch.
13 Is there voltage to the output of the stove limit? If yes,
continue to next step.
Check for proper airflow. Replace stove limit if necessary.
14 Is there voltage HC1? Correct wiring to HC1.
15 Is there voltage to terminals T1, T2 and T3 of HC1? If yes,
continue to next step.
Correct wiring between HC1 and supply.
16 Is there voltage to terminals L1, L2 and L3 of HC1? Replace HC1.
17 Is there voltage across the elements? If yes, then continue
to next step.
Correct wiring to the elements.
18 Do the elements produce heat? If yes, continue to Step 35.
NOTE: IF elements are glowing a bright red/orange,
there is not enough airflow.
Check for opens or shorts in the elements.
19 Unit operational.
(continued)