Diagnosis Methods Of A Malfunction Of A Compressor And 4-Way Valve - Panasonic CS-A18CKPG Service Manual

13.1.2 Diagnosis methods of a
malfunction of a compressor and 4-way
valve
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Nature of fault
Insufficient compressing of a compressor
Locked compressor
Insufficient switches of the 4-way valve
Electric current during operation becomes approximately 20% lower than the normal
●
value.
The discharge tube of the compressor becomes abnormally hot (normally 70 to
●
90°C).
The difference between high pressure and low pressure becomes almost zero.
●
Electric current reaches a high level abnormally, and the value exceeds the limit of an
●
ammeter. In some cases, a breaker turns off.
The compressor is a humming sound.
●
Electric current during operation becomes approximately 80% lower than the normal
●
value.
Symptom