Service manual

M411429 37
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
40. MM MODELS: FAN MOTOR DOES NOT RUN WITH DOOR CLOSED, CYCLE SELECTED AND
START BUTTON PRESSED
208-240 Volt/60 Hertz/3 Phase Gas and Steam Reversing and Nonreversing
480 Volt/60 Hertz/3 Phase Gas Nonreversing
480 Volt/60 Hertz/3 Phase Steam Reversing
NOTE: Make sure fuse on x1 of transformer is operational (240 Volt and 480 Volt/60 Hertz/3 Phase units).
Step Problem If No, then
1 Is there voltage to the COM of the door switch?
If yes, continue to next step.
Correct wiring between door switch and L1 supply for
208-240 Volt units. Check between door switch and X1 of
transformer for 480 Volt units.
2 Is there 120 VAC to the N.O. terminal of the door switch?
If yes, continue to next step.
Check for proper operation of door switch arm and/or
replace door switch.
3 Is there 120 VAC to terminal P2 of the micro control?
If yes, continue to next step.
Correct wiring between door switch and micro control.
4 Is there 120 VAC to terminal P1 of the micro control?
If yes, continue to next step.
Replace micro control.
5 Is there 120 VAC across the coil of the motor contactor?
If yes, continue to next step.
Correct wiring to the coil of motor contactor.
6 Is there voltage to terminals L1, L2, and L3 of motor
contactor? If yes, continue to next step.
Correct wiring between motor contactor and terminals L1,
L2, L3 and TB1.
7 Is there voltage at terminals T1, T2 and T3 of the M
contactor? If yes, continue to next step.
Replace motor contactor.
8 Is there voltage to L1, L2 and L3 of motor? If yes,
continue to next step.
Correct wiring between motor and motor contactor.
9 Replace motor.