Panasonic CS-YC9MKV Service Manual

Panasonic CS-YC9MKV Service Manual Manual pdf 32 page image

3212.1.1 Relationship between the condition of the air conditioner and pressure andelectric currentCooling ModeCondition of theair conditioner Low Pressure High Pressure Electric current during operationInsufficient refrigerant(gas leakage) Ô Ô ÔClogged capillary tube orstrainer Ô Ô ÔShort circuit in the indoor unit Ô Ô ÔHeat radiation deficiencyof the outdoor unit Ò Ò ÒInefficient compression Ò Ô Ô• Carry out the measurement of pressure, electric current, and temperature fifteen minutes after an operation is started.Diagnosis methods of a malfunction of a compressorNature of fault SymptomInsufficient compressingof a compressorz Electric current during operation becomes approximately 20% lower thank the normal value.z The discharge tube of the compressor becomes abnormally hot (normally 70℃ to 90℃ )z The different between high pressure and low pressure becomes almost zero.Locked compressor z Electric current reaches a high level abnormally, and the value exceeds the limit of an ammeter. Insome cases, a breaker turns off.z Then compressor has a humming sound.