SiENBE12-713
Service Diagnosis 225
Part 6
Service Diagnosis
1. Caution for Diagnosis..........................................................................226
1.1 Troubleshooting with Operation Lamp .................................................226
2. Problem Symptoms and Measures.....................................................228
3. Service Check Function ......................................................................229
3.1 Check Method 1 ...................................................................................229
3.2 Check Method 2 ...................................................................................231
4. Code Indication on the Remote Control..............................................233
4.1 Error Codes and Description of Fault...................................................233
5. Troubleshooting ..................................................................................234
5.1 Indoor Units..........................................................................................234
5.2 Outdoor Units .......................................................................................235
5.3 Indoor Unit PCB Abnormality ...............................................................236
5.4 Freeze-up Protection Control or High Pressure Control.......................237
5.5 Fan Motor or Related Abnormality .......................................................239
5.6 Thermistor or Related Abnormality (Indoor Unit)..................................242
5.7 Front Panel Open / Close Fault............................................................243
5.8 Signal Transmission Error (between Indoor and Outdoor Unit) ...........244
5.9 Unspecified Voltage (between Indoor and Outdoor Units)...................246
5.10 Freeze-up Protection Control ...............................................................247
5.11 Outdoor Unit PCB Abnormality.............................................................249
5.12 OL Activation (Compressor Overload) .................................................250
5.13 Compressor Lock .................................................................................251
5.14 DC Fan Lock ........................................................................................252
5.15 Input Over Current Detection ...............................................................253
5.16 Discharge Pipe Temperature Control...................................................255
5.17 High Pressure Control in Cooling.........................................................256
5.18 Compressor Sensor System Abnormality ............................................258
5.19 Position Sensor Abnormality ................................................................260
5.20 CT or Related Abnormality...................................................................261
5.21 Thermistor or Related Abnormality (Outdoor Unit)...............................263
5.22 Electrical Box Temperature Rise..........................................................265
5.23 Radiation Fin Temperature Rise ..........................................................267
5.24 Output Over Current Detection.............................................................269
5.25 Insufficient Gas.....................................................................................271
5.26 Low-voltage Detection or Over-voltage Detection................................273
5.27 Signal Transmission Error (on Outdoor Unit PCB)...............................274
5.28 Anti-icing Function in Other Rooms / Unspecified Voltage
(between Indoor and Outdoor Units)....................................................275
6. Check..................................................................................................276
6.1 How to Check.......................................................................................276
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