12-3-10. Outdoor Unit Compressor Motor Defective
➀Check if compressor motor is locked up.
Set temperature by remote controller so air conditioner operates under Thermo. ON in cooling operation, then start operation.
Check if compressor operates.
In case of abnormality ➞ Stops in 2 to 5 seconds. Humming of compressor motor can be heard.
After auto restart by
No abnormalities, proceed to check ➁.
➁Measure resistance of compressor motor.
Disconnect each wire from the top of the compressor and measure resistance of each phase.
Normal
Phase | Resistance |
R – S | 1 – 5 Ω |
|
|
S – C | 1 – 5 Ω |
|
|
C – R | 1 – 5 Ω |
|
|
* Use a circuit tester (set to Ω range).
Caution: Carry out this check only after cutting power at the mains or disconnecting unit from the power supply.
In case of abnormality ➞ Replace compressor.
12-4. Outdoor Unit Fan Does Not Work
12-4-1. Outdoor Unit Fan Motor Defective
➀Check if outdoor unit fan is locked up. Turn fan gently by hand.
When fan does not turn easily ➞ Replace fan motor.
No abnormalities, proceed to check ➁.
➁Measure resistance between each wire.
Normal
Color | Resistance |
|
|
BLU – BRN | 70 – 150 Ω |
|
|
BLU – PNK | 300 – 500 Ω |
|
|
* Use a circuit tester (set to Ω range).
In case of abnormality ➞ Replace fan motor.
No abnormalities, check continuity of each wire (PNK, BRN and BLU).
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