SiE12-411
Service Diagnosis 161
Part 6
Service Diagnosis
1. Caution for Diagnosis..........................................................................162
1.1 Troubleshooting with the Operation Lamp ...........................................162
2. Problem Symptoms and Measures.....................................................164
3. Service Check Function ......................................................................165
4. Code Indication on the Remote Controller..........................................166
4.1 Error Codes and Description of Fault...................................................166
5. Troubleshooting ..................................................................................167
5.1 Indoor Units..........................................................................................167
5.2 Outdoor Units .......................................................................................168
5.3 Indoor Unit PCB Abnormality ...............................................................169
5.4 Freeze-up Protection Control or High Pressure Control.......................170
5.5 Fan Motor or Related Abnormality .......................................................172
5.6 Thermistor or Related Abnormality (Indoor Unit)..................................175
5.7 Shutter Drive Motor / Shutter Limit Switch Abnormality .......................176
5.8 Signal Transmission Error (between Indoor and Outdoor Units)..........177
5.9 Unspecified Voltage (between Indoor and Outdoor Units)...................178
5.10 Freeze-up Protection Control ...............................................................179
5.11 OL Activation (Compressor Overload) .................................................181
5.12 Compressor Lock .................................................................................182
5.13 DC Fan Lock ........................................................................................183
5.14 Input Over Current Detection ...............................................................184
5.15 Four Way Valve Abnormality................................................................186
5.16 Discharge Pipe Temperature Control...................................................188
5.17 Position Sensor Abnormality ................................................................189
5.18 CT or Related Abnormality...................................................................190
5.19 Thermistor or Related Abnormality (Outdoor Unit)...............................192
5.20 Electrical Box Temperature Rise..........................................................194
5.21 Radiation Fin Temperature Rise ..........................................................196
5.22 Output Over Current Detection.............................................................198
5.23 Insufficient Gas.....................................................................................200
5.24 Low-voltage Detection..........................................................................202
5.25 Anti-icing Function in Other Rooms / Unspecified Voltage
(between Indoor and Outdoor Units)....................................................203
6. Check..................................................................................................204
6.1 How to Check.......................................................................................204
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