Fan Motor - LG ZHBW041GA0 Service Manual

1.6 Fan Motor

Checking Item
(1) The fan motor does not oper-
ate.
Does failure appears again
when starting operation?
(2) Vibration of the fan motor is
large.
Symptom
1) When power supply is
abnormal
2) For wrong wiring
3) For failure of motor
4) For failure of circuit board
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Countermeasure
• Modify connection status in front of or at the
rear of the breaker, or if the power terminal con-
sole is at frosting condition.
• Modify the power supply voltage is beyond
specified scope.
• For following wiring.
1. Check connection status.
2. Check contact of the connector.
3. Check that parts are firmly secured by tighten-
ing screws.
4. Check connection of polarity.
5. Check short circuit and grounding.
• Measure winding resistance of the motor coils.
Replace the circuit board in following procedures
if problems occur again when powering on and if
there are no matters equivalent to items as spec-
ified in above 1) through 4).
(Carefully check both connector and grounding
wires when replacing the circuit board.)
1. Replace only fan control boards. If starting is
done, it means that the fan control board has
malfunction.
2. Replace both the fan control board and the
main board. If starting is done, it means that
the main board has malfunction.
3. If problems continue to occur even after coun-
termeasure of No.1 and No.2, it means that
both boards have malfunction.
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