Alliance Laundry Systems SWT520*M - Washer will Not Fill (Mixing Valve Diagnostic)

80 39201
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Troubleshooting (MDC Models)
44. Washer Will Not Fill (Mixing Valve Diagnostic)
Is there voltage from
either "H4-4" or "H4-1"
to the Neutral wire?
Is there
120
or 240* volts AC
between either the
hot or cold coil to
terminal 8 on the
motor?
Is there
120
or 240* volts AC
between either the
hot or cold coil to
terminal 4 on the
motor?
Is there
120
or 240* volts AC
across the coil of
either the hot or cold
valve?
Is there voltage
across either the hot
or cold coil to
neutral?
Replace control.
Correct wiring
between mixing
valve and control.
Replace mixing
valve.
Correct wiring
between motor
and neutral wire.
Thermal protector
in motor open.
Replace motor.
Correct wiring
between terminal 8
of the motor and
neutral side of the
hot/cold coil.
No
Yes
Yes
Yes
Yes
Yes
No
No
No
No
(1)
(2)
(3)
(4)
(5)
Note: Assuming No Fill (pressure
switch diagnostics) checks out okay.
Does water flow
through the mixing
valve?
No
Unit operates
properly.
Yes
TLW304S
*Refer to machine serial plate for correct voltage.