Panasonic CS-V18CKE Service Manual

Contents

13.1.1. Relationship between the condition of the air conditioner and pressure andelectric currentCooling ModeCondition of the airconditoner Low Pressure High Pressure Electric current during operationInsufficient refrigerant (gasleakage)Clogged capillary tube orStrainerShort circuit in the indoor unitHeat radiation deficiency ofthe outdoor unitInefficient compression•••• Carry out the measurements of pressure, electric current, and temperature fifteen minutes after an operation is started.13.1.2. Diagnosis methods of a malfunction of a compressorNature 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 has a humming sound.64CS-V18CKE CU-V18CKE / CS-V24CKE CU-V24CKE