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SiUS091601EA

107 Part 6 Service Diagnosis

7.7 Discharge Pipe Temperature Control....................................................... 163

7.8 High Pressure Control in Cooling ............................................................. 165

7.9 System Shutdown due to Temperature Abnormality in the Compressor

................................................................................................................. 167

7.10 Compressor Sensor System Abnormality ................................................ 168

7.11 Position Sensor Abnormality .................................................................... 169

7.12 Thermistor or Related Abnormality (Outdoor Unit)................................... 172

7.13 Electrical Box Temperature Rise.............................................................. 174

7.14 Radiation Fin Temperature Rise .............................................................. 176

7.15 Output Overcurrent Detection .................................................................. 178

7.16 Signal Transmission Error on Outdoor Unit PCB ..................................... 180

8. Check ......................................................................................................181

8.1 Thermistor Resistance Check .................................................................. 181

8.2 Indoor Fan Motor Connector Check......................................................... 182

8.3 Power Supply Waveform Check............................................................... 184

8.4 Electronic Expansion Valve Check........................................................... 184

8.5 Four Way Valve Performance Check ....................................................... 185

8.6 Inverter Unit Refrigerant System Check................................................... 185

8.7 Inverter Analyzer Check........................................................................... 186

8.8 Rotation Pulse Check on the Outdoor Unit PCB ...................................... 189

8.9 Installation Condition Check..................................................................... 190

8.10 Discharge Pressure Check....................................................................... 190

8.11 Outdoor Fan System Check ..................................................................... 191

8.12 Main Circuit Short Check.......................................................................... 191

8.13 Power Module Check ............................................................................... 194

Daikin FDMQ-R Series Service Manual

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