Panasonic CS-E24DKE Service Manual

Contents

8.2.1.4. IPM (Power transistor) Prevention ControlA. Overheating Prevention Control1. When the IPM temperature rises to 110°C, compressor operation will stop immediately.2. Compressor operation restarts after three minutes the temperature decreases to 95°C.B. DC Peak Current Control1. When electric current to IPM exceeds set value of 30.0 ± 5.0 A, the compressor will stop operate. Then, operation will restartafter three minutes.2. If the set value is exceeded again more than 30 seconds after the compressor starts, the operation will restart after twominute.3. If the set value is exceeded again within 30 seconds after the compressor starts, the operation will restart after one minute.If this condition repeats continuously for seven times, all indoor and outdoor relays will be cut off.8.2.1.5. Compressor Overheating Prevention ControlInstructed frequency for compressor operation will be regulated by compressor top temperature. The changes of frequency are asbelow figure.8.2.1.6. Low Pressure Prevention Control (Gas Leakage Detection)1. When the conditions listed in below table occur, the compressor stops and restarts after three minutes.2. If this phenomenon is continuously occurring for twice within 20 minutes, all indoor and outdoor relays will be cut off.3. This control is not applicable for deice operation.Conditions E24DKCooling/Soft Dry Heating1. Compressor frequency (Hz) 74 682. Outdoor total running current (A) 3.25 3.253. Indoor heat exchanger temperature (°C) 20 25Note: Conditions 1 and 2 needed to be happened continuously for 5 minutes.32CS-E24DKE CU-E24DKE