SiBE041012
66
Service Diagnosis
Part 6
Service Diagnosis
1. Caution for Diagnosis............................................................................67
1.1
Troubleshooting with LED ......................................................................67
2. Problem Symptoms and Measures .......................................................68
3. Service Check Function ........................................................................69
4. Troubleshooting ....................................................................................72
4.1
Error Codes and Description ..................................................................72
4.2
Indoor Unit PCB Abnormality .................................................................73
4.3
Freeze-up Protection Control or Heating Peak-cut Control ....................74
4.4
Fan Motor (DC Motor) or Related Abnormality.......................................76
4.5
Thermistor or Related Abnormality (Indoor Unit)....................................78
4.6
Front Panel Open / Close Fault..............................................................79
4.7
Signal Transmission Error (between Indoor Unit and Outdoor Unit) ......80
4.8
Unspecified Voltage (between Indoor Unit and Outdoor Unit) ...............81
4.9
Outdoor Unit PCB Abnormality...............................................................82
4.10 OL Activation (Compressor Overload) ...................................................83
4.11 Compressor Lock ...................................................................................84
4.12 DC Fan Lock ..........................................................................................85
4.13 Input Overcurrent Detection ...................................................................86
4.14 Four Way Valve Abnormality..................................................................87
4.15 Discharge Pipe Temperature Control.....................................................89
4.16 High Pressure Control in Cooling ...........................................................90
4.17 Compressor System Sensor Abnormality ..............................................92
4.18 Position Sensor Abnormality ..................................................................93
4.19 DC Voltage / Current Sensor Abnormality..............................................95
4.20 Thermistor or Related Abnormality (Outdoor Unit).................................96
4.21 Electrical Box Temperature Rise............................................................98
4.22 Radiation Fin Temperature Rise ..........................................................100
4.23 Output Overcurrent Detection ..............................................................102
4.24 Refrigerant Shortage ............................................................................104
4.25 Low-voltage Detection or Over-voltage Detection................................106
5. Check ..................................................................................................107
5.1
How to Check .......................................................................................107