TROUBLESHOOTING SECTION
9
WARNING:
Inspection, testing and repair of electrical equipment should be performed only by qualified service personnel. Certain
procedures in this section require electrical tests or measurements while power is applied to the machine.
Exercise
extreme caution at all times.
If test points are not easily accessible, disconnect power, attach test equipment and reap
ply power to test. When replacing electrical parts, disconnect power at source circuit breaker.
Possible Cause
Action
Faulty control relay.
Check the voltage across relay contacts #7
& #4. If 120V during the wash cycle, replace
the relay.
Faulty wash relay.
Check voltage at relay coil between
ORANGE/BLACK and WHITE wires. If you
read 120V, coil is faulty. Replace the relay.
Loose wire connections to motor, delime
switch, or from contactors.
Tighten wires.
Mechanical binding in pump.
If motor has correct incoming voltage, and
its overload is tripping, repair or replace the
pump.
Mechanical binding in pump.
On end of motor, opposite pump, remove
endcap. With large slot type screwdriver, fit
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Faulty wash motor.
If the motor has the correct incoming
voltage and the pump is okay, replace the
motor.
Faulty wash relay.
With the wash relay pushed in, check the
voltage between T1 and L1 of the relay. If
120V, replace the relays.
High or low voltage problem.
Check voltage at motor and at power
terminal block. Compare to electrical
specifications.
The NORMAL/DELIME switch is in the
Delime position.
Place the switch in the Normal position.
Wash relay contacts are welded closed.
Turn machine off. If wash relay doesn't
release, replace contactor.
Cam timer stalled in wash or rinse cycle.
If cam timer is not rotating, check the
voltage to the timer motor. If no voltage
when the door is closed, check wires and/or
replace motor.
Wash motor microswitch faulty.
Tighten connections, make sure switch
makes contact, replace if necessary.
Door switch shorted.
With machine off, open doors, and with both
wiresto door switch unplugged, measure
continuity between wires on switch. If there
is continuity, replace the switch.
Faulty wash relay (wash relay contacts
welded closed).
Turn machine off, if wash relay doesn't
release, replace contactor.
Faulty control relay.
With power off, remove WHITE/RED &
BLACK/YELLOW wires from control relay
terminals #9 & #6. If there is continuity,
replace relay.
Water level is too low.
Increase fill time on cam timer, or decrease
drain timer, or increase incoming water
pressure.
Sump strainer clogged.
Clean strainer.
Wash arms clogged.
Clean arms and jets.
Machine runs with door open.
Wash motor does not run, other functions
work, motor runs only when the wash relay
is manually pushed down.
Wash motor does not run even when the
wash relay is manually depressed; other
functions work.
Wash motor runs continuously.
Low pumped water pressure.
Symptom
