Panasonic CS-Z35UD3RAW Service Manual

Also see for CS-Z25UD3RAW: Operating instructions

9216.1.4 Compressor Overheating Prevention Control Instructed frequency for compressor operation will be regulated by compressor temperature. The changes offrequency are as below. If compressor temperature exceeds 103°C, compressor will be stopped, occurs 4 times per 20 minutes(“F97” is indicated.)Compressor = OFFCompressor FrequencyReduceCompressor FrequencyMaintainFreeComp. temperature103°C99°C96°C88°C87°C86°C16.1.5 Low Pressure Prevention Control (Gas Leakage Detection) Control start conditionso For 5 minutes, the compressor continuously operates and outdoor total current is between 0.75A and 0.95A(Z25/35UD3), 1.38A and 1.65A (Z50/60UD3).o During Cooling and Soft Dry operations:Indoor suction temperature - indoor piping temperature is below 4°C.o During Heating operations :Indoor piping temperature - indoor suction is under 5°C. Control contentso Compressor stops (and restart after 3 minutes).o If the conditions above happen 2 times within 20 minutes, the unit will: Stop operation “F91” indicated.16.1.6 Low Frequency Protection Control 1 When the compressor operate at frequency lower than 24 Hz continued for 20 minutes, the operation frequencywill be changed to 23 Hz for 2 minutes.16.1.7 Low Frequency Protection Control 2 When all the below conditions comply, the compressor frequency will change to lower frequency.Temperature, T, for: Cooling/Soft Dry HeatingIndoor intake air (°C) T < 14 or T ≥ 30 T < 14 or T ≥ 28Outdoor air (°C) T < 13 or T ≥ 38 T < 4 or T ≥ 24Indoor heat exchanger (°C) T < 30 T ≥ 0