SiUS121736EA
131
Service Diagnosis
Part 6
Service Diagnosis
1. General Problem Symptoms and Check Items .......................................133
2. Troubleshooting with LED .......................................................................134
4. Code Indication on Remote Controller .................................................... 149
5. Troubleshooting for RA Indoor Unit.........................................................151
Indoor Unit PCB Abnormality ................................................................... 151
Freeze-up Protection Control, Heating Peak-cut Control ......................... 153
Indoor Fan Motor or Related Abnormality ................................................ 154
Thermistor or Related Abnormality........................................................... 158
Front Panel Open/Close Fault.................................................................. 159
Signal Transmission Error (Between Indoor Unit and Outdoor Unit)........ 160
Mismatching of Indoor Unit and Outdoor Unit .......................................... 162
6. Troubleshooting for SA Indoor Unit.........................................................163
Indoor Unit PCB Abnormality ................................................................... 163
Drain Level Control System Abnormality.................................................. 164
Indoor Fan Motor or Related Abnormality ................................................ 165
Indoor Fan PCB Abnormality.................................................................... 169
Humidifier or Related Abnormality............................................................ 170
Thermistor or Related Abnormality........................................................... 171
Presence Sensor or Floor Sensor Abnormality ........................................ 172
Remote Controller Thermistor Abnormality .............................................. 173
Signal Transmission Error (Between Indoor Unit and Outdoor Unit)........ 174
6.10 Signal Transmission Error
(Between Indoor Unit and Remote Controller) ......................................... 176
6.11 Signal Transmission Error
(Between MAIN Remote Controller and SUB Remote Controller) ........... 177
6.12 Mismatching of Indoor Unit and Outdoor Unit .......................................... 178
7. Troubleshooting for Outdoor Unit............................................................ 179
Low-voltage Detection or Over-voltage Detection.................................... 181
Wiring Error Check Unexecuted ............................................................... 183