Steam Om Models: No Heat With Cycle Selected, Unit Running And Calling For Heat - ALLIANCE AT050L Service Manual

To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the tumbler before servicing.
• Close gas shut-off valve to gas tumbler before servicing.
• Close steam valve to steam tumbler before servicing.
• Never start the tumbler with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the tumbler is properly grounded.
20. STEAM OM MODELS: NO HEAT WITH CYCLE SELECTED, UNIT RUNNING AND CALLING
FOR HEAT
120 Volt/60 Hertz/1 Phase and 208-240 Volt/60 Hertz/1 Phase Nonreversing
460-480 Volt/60 Hertz/3 Phase and 208-240 Volt/60 Hertz/3 Phase Reversing and Nonreversing
Step Problem
1 Is there voltage at H2-13? If yes, continue to next step.
2 Is there voltage at H2-6? If yes, continue to next step.
3 Is there voltage at H2-5? If yes, continue to next step.
4 Is there voltage to the input of the motor relay? If yes,
continue to next step.
5 Is there voltage to the output of the motor relay?
6 Is there voltage to the input of the motor switch? If yes,
continue to next step.
7 Is there voltage to the output of the motor switch? If yes,
continue to next step.
8 Is there voltage across the steam valve coil? If yes,
continue to next step.
9 Unit operational. If unit still doesn't heat, check steam
supply.
70269301 © Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
WARNING
If No, then
Replace micro control.
Correct wiring between H2-6 and H2-13.
Check for proper thermistor operation. Replace micro
control if necessary.
Correct wiring between motor relay and micro control.
Replace motor relay.
Correct wiring to motor switch.
Replace motor.
Correct wiring to steam valve coil.
Section 3 Troubleshooting
W002
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