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166
COMPONENTS TESTING
Test Fan Motor and Compressor
Test the resistance of the winding. The compressoris faulted if the resistance of
winding is 0(short c ircuit)or∞（open circuit ）
Notes
1)Compressor motor lock.
2)Discharge pressure value approaches static pressure value .
3)
5
4
2
1
4. Inductance
1) Sound abnormality
2) Insulation resistance disqualification.
5. EEV - Stepper
TOOL: Multimeter.
Test the resistance of winding. The stepper motor is fault if the resistance of winding
0(short circuit)or∞（open circuit ）.
1)
2)
3)
4)
Typical Symptoms
Compressor phases are not equal (+/- 0.1Ohm).
Do not put a compressor on its side or turn over.
When changing compressor, do not leave exposed to ambient conditions for
longer than needed.
Ensure compressor is wired properly before starting. Reverse wiring will permanently
damage the compressor.
In cases with low voltage, the compressor may be de-rated in capacity.
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