Alliance Laundry Systems CABINET HARDMOUNT UC125VNV Service Manual download pdf (Page 52)

50 F232203

Troubleshooting

11. Contactor Analysis (FWD and REV)

Contactor Analysis (FWD and REV)

Is there voltage

(120 Volts AC) between the

FWD wire and the ACN?

Is there voltage (120 Volts AC)

between the REV wire and

the ACN?

Disconnect

power to the machine.

Using an ohm meter, is there continuity

between the coils on the KM3

contactor and the coils on

the KM4 contactor?

YES

Inspect the motor wiring and repair

or replace it as needed.

Inspect the motor and replace it

as needed.

YES

Replace the KM3 and/or the KM4

contactor(s) as needed.

Manually operate

the KM3 and/or the KM4

contactor(s). Does the

motor function?

Examine the wiring to terminal

strip 27. Repair and/or replace

the wiring as needed.

Replace the KM3 and/or the KM4

contactor(s) as needed.

YES

The contactor is not energizing.

CHM408S

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Alliance Laundry Systems CABINET HARDMOUNT UC125VNV Service Manual Page 52