How To Simply Judge Whether Outdoor Fan Motor Is Good Or Bad - Carrier 42NQV009E Service Manual

10-9. How to Simply Judge Whether Outdoor Fan Motor is Good or Bad

1. Symptom
• Outdoor fan motor does not rotate.
• Outdoor fan motor stops within several ten seconds though it starts rotating.
• Outdoor fan motor rotates or does not rotate according to the position where the fan stopped., etc.
2. Cause
The following causes are considered when the outdoor fan motor does not normally rotate.
1) Mechanical lock of the outdoor fan motor
2) Winding error of the outdoor fan motor
3) Motor drive circuit error of the outdoor P.C. board
3. How to simply judge whether outdoor fan motor is good or bad
Turn OFF the breaker.
Disconnect connectors
of the outdoor fan motor from the inverter.
Does the fan rotate without trouble
when rotating it with hands?
If the resistance value at Fan motor connector
Main coil (Black-Red) ~237
Auxilary coil (Black-White) ~380
Fan motor is normal.
(Outdoor P.C. board error)
NOTE :
However, GND circuit error inside of the motor may be accepted in some cases when the above check is
performed.
When the fan motor does not become normal even if P.C. board is replaced the outdoor fan motor.
YES
Ω
Ω
are normal.
YES
– 69 –
NO
NO
Fan motor error
FILE NO. SVM-07018