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 tens seconds though it started rotating.
•Outdoor fan motor rotates or does not rotate according to the position where the fan stopped., etc. Remote controller check code “02 : Outdoor block, 1A : Outdoor fan drive system error”
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)
or
4)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 two connectors (CN300 and CN301) of the outdoor fan motor from the inverter.
Does the fan rotate without trouble when rotating it with hands?
|
| YES |
| |
| If the resistance value between | |||
1 | (Red lead) | – | 2 | (White lead) |
2 | (White lead) | – | 3 | (Black lead) |
3 | (Black lead) | – | 1 | (Red lead) |
of the connector
(CN300 : Motor winding) is 50 to 80
, it is normal.
YES
If the resistance value between
1 (Yellow lead) – 4 (Pink lead)
of the connector
(CN301 : Motor position detection) is 5k to 20k
, it is normal.
YES
Fan motor is normal.
(Outdoor P.C. board error)
NO
CN300
NO
NO
Fan motor 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, replace the outdoor fan motor.
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