SiBE12-519
Service Diagnosis 127
Part 6
Service Diagnosis
1. Caution for Diagnosis..........................................................................128
2. Problem Symptoms and Measures .....................................................130
3. Service Check Function ......................................................................131
4. Troubleshooting ..................................................................................134
4.1 Error Codes and Description ................................................................134
4.2 Indoor Unit PCB Abnormality ...............................................................135
4.3 Freeze-up Protection Control or High Pressure Control.......................136
4.4 Fan Motor or Related Abnormality .......................................................138
4.5 Thermistor or Related Abnormality (Indoor Unit)..................................141
4.6 Freeze-up Protection Control ...............................................................142
4.7 OL Activation (Compressor Overload) .................................................144
4.8 Compressor Lock .................................................................................145
4.9 DC Fan Lock ........................................................................................146
4.10 Input Over Current Detection ...............................................................147
4.11 Four Way Valve Abnormality................................................................149
4.12 Discharge Pipe Temperature Control...................................................151
4.13 High Pressure Control in Cooling .........................................................152
4.14 Position Sensor Abnormality ................................................................154
4.15 CT or Related Abnormality ...................................................................155
4.16 Thermistor or Related Abnormality (Outdoor Unit)...............................157
4.17 Electrical Box Temperature Rise..........................................................159
4.18 Radiation Fin Temperature Rise ..........................................................161
4.19 Output Over Current Detection.............................................................163
4.20 Insufficient Gas.....................................................................................165
4.21 Over-voltage Detection.........................................................................167
4.22 Anti-icing Function in Other Rooms / Unspecified Voltage
(between Indoor and Outdoor Units)....................................................168
4.23 Outdoor Unit PCB Abnormality or Signal Transmission
Circuit Abnormality ...............................................................................169
5. Check ..................................................................................................170
5.1 How to Check .......................................................................................170
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