Panasonic CS-C18KKS, CU-C18KKS, CU-C24KKS, CS-C24KKS dimensions Condition of the

15.1.1Relationship between the condition of the air conditioner and pressure and electric current

Condition of the		Cooling Mode
air conditioner	Low Pressure	High Pressure	Electric current during operation
Insufficient refrigerant	Ô	Ô	Ô
(gas leakage)
Clogged capillary tube or	Ô	Ô	Ô
strainer
Short circuit in the indoor unit	Ô	Ô	Ô
Heat radiation deficiency	Ò	Ò	Ò
of the outdoor unit
Inefficient compression	Ò	Ô	Ô

• Carry out the measurement of pressure, electric current, and temperature fifteen minutes after an operation is started.

15.1.2Diagnosis methods of a malfunction of a compressor

Nature of fault

Insufficient compressing of a compressor

Locked compressor

Symptom

•Electric current during operation becomes approximately 20% lower than the normal value.

•The discharge tube of the compressor becomes abnormally hot (normally 70°C to 90°C).

•The different 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.

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