SiBE041010
Service Diagnosis
51
Part 6
Service Diagnosis
1. Caution for Diagnosis............................................................................52
1.1
Troubleshooting with LED ......................................................................52
2. Problem Symptoms and Measures .......................................................53
3. Service Check Function ........................................................................54
4. Troubleshooting ....................................................................................57
4.1
Error Codes and Description ..................................................................57
4.2
Indoor Unit PCB Abnormality .................................................................58
4.3
Freeze-up Protection Control or Heating Peak-cut Control ....................59
4.4
Fan Motor (DC Motor) or Related Abnormality.......................................61
4.5
Thermistor or Related Abnormality (Indoor Unit)....................................63
4.6
Signal Transmission Error (between Indoor and Outdoor Unit) .............64
4.7
Unspecified Voltage (between Indoor and Outdoor Unit).......................65
4.8
Outdoor Unit PCB Abnormality...............................................................66
4.9
OL Activation (Compressor Overload) ...................................................67
4.10 Compressor Lock ...................................................................................68
4.11 DC Fan Lock ..........................................................................................69
4.12 Input Overcurrent Detection ...................................................................70
4.13 Four Way Valve Abnormality..................................................................71
4.14 Discharge Pipe Temperature Control.....................................................73
4.15 High Pressure Control in Cooling ...........................................................74
4.16 Compressor System Sensor Abnormality ..............................................75
4.17 Position Sensor Abnormality ..................................................................76
4.18 DC Voltage / Current Sensor Abnormality..............................................78
4.19 Thermistor or Related Abnormality (Outdoor Unit).................................79
4.20 Electrical Box Temperature Rise............................................................81
4.21 Radiation Fin Temperature Rise ............................................................83
4.22 Output Overcurrent Detection ................................................................85
4.23 Refrigerant Shortage ..............................................................................87
4.24 Low-voltage Detection or Over-voltage Detection..................................89
5. Check ....................................................................................................90
5.1
How to Check .........................................................................................90
