Service manual
SiENBE12-522A
Service Diagnosis 197
Part 6
Service Diagnosis
1. Caution for Diagnosis..........................................................................198
1.1 Troubleshooting with Operation Lamp .................................................198
2. Problem Symptoms and Measures .....................................................200
3. Service Check Function ......................................................................201
4. Code Indication on the Remote Controller ..........................................204
4.1 Error Codes and Description of Fault ...................................................204
5. Troubleshooting ..................................................................................205
5.1 Indoor Units ..........................................................................................205
5.2 Outdoor Units .......................................................................................206
5.3 Indoor Unit PCB Abnormality ...............................................................207
5.4 Freeze-up Protection Control or High Pressure Control.......................208
5.5 Fan Motor or Related Abnormality .......................................................210
5.6 Thermistor or Related Abnormality (Indoor Unit)..................................213
5.7 Shutter Drive Motor / Shutter Limit Switch Abnormality .......................214
5.8 Signal Transmission Error (between Indoor and Outdoor Units)..........215
5.9 Unspecified Voltage (between Indoor and Outdoor Units) ...................216
5.10 Freeze-up Protection Control ...............................................................217
5.11 OL Activation (Compressor Overload) .................................................219
5.12 Compressor Lock .................................................................................220
5.13 DC Fan Lock ........................................................................................221
5.14 Input Over Current Detection ...............................................................222
5.15 Four Way Valve Abnormality................................................................224
5.16 Discharge Pipe Temperature Control...................................................226
5.17 High Pressure Control in Cooling .........................................................227
5.18 Position Sensor Abnormality ................................................................229
5.19 CT or Related Abnormality ...................................................................230
5.20 Thermistor or Related Abnormality (Outdoor Unit)...............................232
5.21 Electrical Box Temperature Rise..........................................................234
5.22 Radiation Fin Temperature Rise ..........................................................236
5.23 Output Over Current Detection.............................................................238
5.24 Insufficient Gas.....................................................................................240
5.25 Low-voltage Detection..........................................................................242
5.26 Anti-icing Function in Other Rooms / Unspecified Voltage
(between Indoor and Outdoor Units)....................................................243
6. Check ..................................................................................................244
6.1 How to Check .......................................................................................244