Aurora Service Manual

SiUS121737EA
Service Diagnosis 130
7.6 Outdoor Unit PCB Abnormality................................................................. 185
7.7 OL Activation (Compressor Overload) ..................................................... 186
7.8 Compressor Lock ..................................................................................... 188
7.9 DC Fan Lock ............................................................................................ 189
7.10 Input Overcurrent Detection ..................................................................... 190
7.11 Four Way Valve Abnormality.................................................................... 191
7.12 Discharge Pipe Temperature Control....................................................... 193
7.13 High Pressure Control in Cooling ............................................................. 194
7.14 Compressor Sensor System Abnormality ................................................ 195
7.15 Position Sensor Abnormality .................................................................... 197
7.16 CT or Related Abnormality ....................................................................... 199
7.17 Thermistor or Related Abnormality (Outdoor Unit)................................... 201
7.18 Electrical Box Temperature Rise.............................................................. 203
7.19 Radiation Fin Temperature Rise .............................................................. 204
7.20 Output Overcurrent Detection .................................................................. 205
8. Check ......................................................................................................207
8.1 Thermistor Resistance Check .................................................................. 207
8.2 Indoor Fan Motor Connector Check ......................................................... 208
8.3 Hall IC Check ........................................................................................... 209
8.4 Power Supply Waveform Check............................................................... 209
8.5 Electronic Expansion Valve Check........................................................... 210
8.6 Four Way Valve Performance Check ....................................................... 211
8.7 Inverter Unit Refrigerant System Check................................................... 211
8.8 Inverter Analyzer Check ........................................................................... 212
8.9 Rotation Pulse Check on the Outdoor Unit PCB ...................................... 213
8.10 Installation Condition Check..................................................................... 214
8.11 Discharge Pressure Check....................................................................... 214
8.12 Outdoor Fan System Check ..................................................................... 215
8.13 Main Circuit Short Check.......................................................................... 215
8.14 Capacitor Voltage Check.......................................................................... 216
8.15 Power Module Check ............................................................................... 217