Om And Rm Models: No Start With Cycle Selected, Start Button Pressed And Door Closed - ALLIANCE AT050L Service Manual

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.
21. OM AND RM MODELS: NO START WITH CYCLE SELECTED, START BUTTON PRESSED AND
DOOR CLOSED
120 Volt/60 Hertz/1 Phase Gas and Steam Nonreversing
208-240 Volt/60 Hertz/1 or 3 Phase Steam Nonreversing
208-240 Volt/60 Hertz/3 Phase Electric Nonreversing
460-480 Volt/60 Hertz/3 Phase Gas, Electric and Steam Nonreversing
Step Problem
1 Is there voltage to the primary of the transformer? If yes,
continue to next step.
2 Is there 24 VAC across terminals 2 & 3 of transformer
secondary? If yes, continue to next step.
3 Is there voltage to the COM terminal of the door switch?
If yes, continue to next step.
4 Is there voltage to the N.O. terminal of the door switch? If
yes, continue to next step.
5 Is there voltage to the COM terminal of the lint panel
switch? If yes, continue to next step.
6 Is there voltage to the N.O. terminal of the lint panel
switch? If yes, continue to next step.
7 Is there voltage to terminal H2-8 on the micro control? If
yes, continue to next step.
8 Is there voltage at terminal H2-7 on the micro control? If
yes, continue to next step.
9 Is there voltage across the coil of motor relay? If yes,
continue to next step.
10 Is there voltage to the input of the motor relay? If yes,
continue to next step.
11 Is there voltage to the output of the motor relay? If yes,
continue to next step.
12 Does the motor operate? If yes, continue to next step.
13 Unit operational.
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WARNING
If No, then
Correct wiring to transformer primary. Check fuses.
Replace transformer.
Correct wiring between door switch and transformer.
Check fuse.
Check door switch for proper operation. Replace if
necessary.
Correct wiring between lint panel switch and loading door
switch.
Check lint panel switch for proper operation. Replace if
necessary.
Correct wiring between micro control and lint panel
switch.
Replace micro control.
Correct wiring between motor relay and micro control.
Correct wiring between motor relay and supply voltage.
Replace motor relay.
Replace motor.
W002
70269301