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12-3-10. Outdoor Unit Compressor Motor Defective
➀ Check 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.
➁ Measure resistance of compressor motor.
Disconnect each wire from the top of the compressor and measure resistance of each phase.
No abnormalities, proceed to check
➁
.
In case of abnormality ➞ Stops in 2 to 5 seconds. Humming of compressor motor can be heard.
After auto restart by 3-minute timer, same thing happens. If this condition contin-
ues, replace the compressor motor.
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.
Phase Resistance
Normal
R – S 1 – 5 Ω
S – C 1 – 5 Ω
C – R 1 – 5 Ω
* Use a circuit tester (set to Ω range).
12-4. Outdoor Unit Fan Does Not Work
12-4-1. Outdoor Unit Fan Motor Defective
➀ Check 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
.
*Use a circuit tester (set to Ω range).
➁ Measure resistance between each wire.
In case of abnormality ➞ Replace fan motor.
No abnormalities, check continuity of each wire (PNK, BRN and BLU).
Color Resistance
Normal BLU – BRN 70 – 150 Ω
BLU – PNK 300 – 500 Ω