Diagnosis Methods Of A Malfunction Of A Compressor - Panasonic CS-PC9DKV Service Manual

CS-PC9DKV / CU- PC9DKV / CS- PC12DKV
12.2. Relationship between the condition of air conditioner and pressrue
and electric current
Condition of the air
conditioner
Insufficient refrigerant
(gas leakage)
Clogged capillary
tube
Short circuit in the
indoor unit
Heat radiation deficiency
of the outdoor unit
Insufficient
compression

12.3. Diagnosis methods of a malfunction of a compressor .

Nature of fault
Insufficient compressing
of a compressor
Locked compressor
/ CU- PC12DKV
Low pressure
Electric current during operation becomes approximately 80% lower
than the normal level.
The discharge tube of the compressor becomes abnormally hot
(normally 70~90 ).
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 has a humming sound.
Cooling mode
High pressure
Symptom
46
Electric current
during operation