Alliance Laundry Systems BU170S Service Manual download pdf (Page 101)

70422201R1

LED OPL and UniLinc Troubleshooting

58.Fan Motor Contactor Error

UniLinc Error Display: Fan Motor Contactor Error

LED OPL Error Display: E FCon

Is there 24 volts AC

at H6-1 to H6-9?

Is there 24 volts AC

at H2-6 to H6-9?

Check Transformer

and Fuse F3.

Replace

I/O Board (AP1).

Check harness and

wire connections at

the motor contactor.

Repair or replace

as required.

Yes

NOTE: Before performing these checks, the airflow switch must be pulled in, and the motor must be running.

NOTE: If the voltage is present but

lower than 24 volts AC, ensure the

correct transformer configuration

jumper is installed.

Is there 24 volts AC at

H2-4 to H6-9 with fan

motor running?

Check control harness

H3 and I/O Board (AP1).

Replace as required.

Is there

5 volts DC at H3-8

to H3-11 with motor

contactor not engaged and

0 volts DC with motor

contactor

engaged?

(1)

(2)

(3)

(4)

CAUTION: Always power down the machine

PRIOR to disconnecting or connecting the

H3 harness. Once disconnected, you can

power up the machine for troubleshooting.

Failure to do so may damage the front-end control.

NOTE: The following checks are DC

voltage checks.

Replace front-end

control (AP2).

TMB2382S

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Alliance Laundry Systems BU170S Service Manual Page 101

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