Alliance Laundry Systems BU170S Service Manual download pdf (Page 54)

70422201R1

Hybrid Timer Control Troubleshooting

34.Control Has No Display

Is there voltage

supplied to the unit?

Is there voltage to the

input side of the

primary fuse(s)?

Is there voltage to the

output side of the

primary fuse(s)?

Is there voltage

across the primary side

of the transformer?

Is there voltage across

2 & 3 of transformer

secondary?

Is there volt age across

terminals H1-3 &

H1-1 on hybrid timer?

Check H6-1 (+) and

H6-2 (-) for +5 VDC.

Connect supply

voltage and run unit.

Correct wiring

between primary

fuse and supply.

Replace primary

fuse.

Correct wiring

between transformer

and primary fuse.

Replace transformer

Correct wiring

between hybrid timer

and transformer

secondary.

Replace hybrid

control assembly.

YES

(1)

(6)

(2)

(3)

(4)

(5)

YES

Replace display

assembly.

Gas, steam and electric heat.

Single and three phase supply.

Note: Reference voltage to

supply neutral.

TMB2000S

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Alliance Laundry Systems BU170S Service Manual Page 54

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