Panasonic CS-PW9CKE Service Manual

Also see for CS-PW12CKE: Operating instructions

11.1.1. Relationship between the condition of the air conditioner and pressure andelectric currentCooling Mode Heating ModeCondition of the airconditoner Low Pressure High Pressure Electric currentduring operationLow Pressure High Pressure Electric currentduring operationInsufficient refrigerant(gas leakage)Clogged capillary tubeor StrainerShort circuit in theindoor unitHeat radiationdeficiency of theoutdoor unitInefficient compression•••• Carry out the measurements of pressure, electric current, and temperature fifteen minutes after an operation is started.11.1.2. Diagnosis methods of a malfunction of a compressor and 4-way valveNature of fault Symptom•••• Electric current during operation becomes approximately 20% lower than the normal value.Insufficient compressing of a compressor •••• 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 anammeter. In some cases, a breaker turns off.Locked compressor•••• The compressor is a humming sound.•••• Electric current during operation becomes approximately 80% lower than the normal value.Insufficient switches of the 4-way valve•••• The temperature different between from the discharge tube to the 4-way valve and fromsuction tube to the 4-way valve becomes almost zero.53CS-PW9CKE / CU-PW9CKE / CS-PW12CKE / CU-PW12CKEPanasonic ilmalämpöpumput korjaa ja huoltaa pääkaupunkiseudulla: Jäähdytinpalvelu RefGroup Oywww.ilmalämpöpumput.com