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
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