SiENBE04-512A
Service Diagnosis 95
Part 6
Service Diagnosis
1. Caution for Diagnosis............................................................................96
2. Problem Symptoms and Measures.......................................................97
3. Service Check Function ........................................................................98
4. Troubleshooting ..................................................................................101
4.1 Error Codes and Description................................................................101
4.2 Indoor Unit PCB Abnormality ...............................................................102
4.3 Freeze-up Protection Control or High Pressure Control.......................103
4.4 Fan Motor (AC Motor) or Related Abnormality.....................................105
4.5 Thermistor or Related Abnormality (Indoor Unit)..................................106
4.6 Signal Transmission Error (between Indoor and Outdoor Unit) ...........107
4.7 OL Activation (Compressor Overload) .................................................108
4.8 Compressor Lock .................................................................................109
4.9 DC Fan Lock ........................................................................................110
4.10 Input Over Current Detection ...............................................................111
4.11 Four Way Valve Abnormality................................................................112
4.12 Discharge Pipe Temperature Control...................................................114
4.13 High Pressure Control in Cooling.........................................................115
4.14 Position Sensor Abnormality ................................................................117
4.15 DC Voltage / Current Sensor Abnormality............................................118
4.16 Thermistor or Related Abnormality (Outdoor Unit)...............................119
4.17 Electrical Box Temperature Rise..........................................................121
4.18 Radiation Fin Temperature Rise ..........................................................123
4.19 Output Over Current Detection.............................................................125
4.20 Insufficient Gas.....................................................................................127
4.21 Over-voltage Detection.........................................................................129
5. Check..................................................................................................130
5.1 How to Check.......................................................................................130
SiENBE04-512A.book Page 95 Friday, October 5, 2007 1:49 PM
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