Alliance Laundry Systems BU170S Service Manual download pdf (Page 91)

70422201R1

LED OPL and UniLinc Troubleshooting

50.Close Door Indication

Is there 24 volts AC at

H6-1 to H6-9?

Is there 24 volts AC at

H6-8 to H6-9?

Check Transformer

and Fuse F3.

Replace

I/O Board (AP1).

Replace

I/O Board (AP1).

Check harness and

loading door switch.

Repair or replace

as required.

Yes

TMB2380S

NOTE: Before proceeding, check the lint door, loading doors and switches for proper mechanical operation.

Is there 24 volts AC at

H6-2 to H6-9?

Check harness and

lint door switch.

Repair or replace

as required.

Is there 24 volts AC at

H6-3 to H6-9 with loading

door and lint doors

closed?

Is there 24 volts AC at

H6-4 to H6-9 with both

doors closed?

Yes

Check harness.

Replace harness

or I/O Board (AP1).

as required.

Yes

(1)

(2)

(3)

(5)

Is there 5 volts DC at

H3-6 to H3-11 closest to the

front-end control with loading

door open and 0 volts DC

with loading door

closed?

Check harness and

I/O Board (AP1).

Repair or replace

as required.

Is there 5 volts DC

at H3-18 to H3-11 with either

loading or lint door open and

0 volts DC with both

doors closed?

(6)

(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.

(7)

Replace front-end

control (AP2).

NOTE: If the voltage is present but

lower than 24 volts AC, ensure the

correct transformer configuration

jumper is installed.

TMB2380S

1 2 ... 86 87 88 89 90 91 92 93 94 95 96 ... 119 120

Comments to this Manuals

No comments

Alliance Laundry Systems BU170S Service Manual Page 91

Comments to this Manuals

Related products and manuals for Electric laundry dryers Alliance Laundry Systems BU170S