SiUS04-904
Service Diagnosis 91
Part 6
Service Diagnosis
1. Caution for Diagnosis...............................................................................92
2. Problem Symptoms and Measures .......................................................... 94
3. Service Check Function ........................................................................... 95
4. Troubleshooting .......................................................................................98
4.1 Error Codes and Description ..................................................................... 98
4.2 Indoor Unit PCB Abnormality .................................................................... 99
4.3 Freeze-up Protection Control or High Pressure Control.......................... 100
4.4 Fan Motor or Related Abnormality .......................................................... 102
4.5 Thermistor or Related Abnormality (Indoor Unit)..................................... 105
4.6 Signal Transmission Error (between Indoor and Outdoor Unit) .............. 106
4.7 OL Activation (Compressor Overload) .................................................... 108
4.8 Compressor Lock .................................................................................... 109
4.9 DC Fan Lock ........................................................................................... 111
4.10 Input Overcurrent Detection .................................................................... 112
4.11 Four-Way Valve Abnormality................................................................... 115
4.12 Discharge Pipe Temperature Control...................................................... 119
4.13 High Pressure Control in Cooling ............................................................ 121
4.14 Position Sensor Abnormality ................................................................... 123
4.15 DC Voltage / Current Sensor Abnormality............................................... 125
4.16 CT or Related Abnormality ...................................................................... 126
4.17 Thermistor or Related Abnormality (Outdoor Unit).................................. 128
4.18 Electrical Box Temperature Rise............................................................. 130
4.19 Radiation Fin Temperature Rise ............................................................. 132
4.20 Output Overcurrent Detection ................................................................. 134
4.21 Refrigerant Shortage ............................................................................... 138
4.22 Over-voltage Detection............................................................................ 142
4.23 Low-voltage Detection............................................................................. 143
5. Check ..................................................................................................... 144
5.1 How to Check .......................................................................................... 144
To Next Page
Loading...
