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SiUS121827E
Part 6 Service Diagnosis 143
1. General Problem Symptoms and Check Items .......................................145
2. Troubleshooting with LED .......................................................................146
2.1 Indoor Unit................................................................................................ 146
2.2 Outdoor Unit ............................................................................................. 149
3. Service Diagnosis ...................................................................................150
3.1 ARC452 Series Wireless Remote Controller............................................ 150
3.2 ARC466 Series Wireless Remote Controller............................................ 153
3.3 BRC1E73 Wired Remote Controller......................................................... 156
3.4 BRC082A43, BRC082A41W, BRC082A42W(S) Wireless Remote Controller
................................................................................................................. 158
4. Code Indication on Remote Controller ....................................................162
4.1 RA Indoor Unit.......................................................................................... 162
4.2 SA Indoor Unit .......................................................................................... 162
4.3 Outdoor Unit ............................................................................................. 163
5. Troubleshooting for RA Indoor Unit.........................................................164
5.1 Indoor Unit PCB Abnormality ................................................................... 164
5.2 Freeze-up Protection Control/Heating Peak-cut Control .......................... 166
5.3 Indoor Fan Motor or Related Abnormality ................................................ 167
5.4 Thermistor or Related Abnormality........................................................... 172
5.5 Front Panel Open/Close Fault.................................................................. 173
5.6 Signal Transmission Error (Between Indoor Unit and Outdoor Unit)........ 174
5.7 Mismatching of Indoor Unit and Outdoor Unit .......................................... 177
6. Troubleshooting for SA Indoor Unit.........................................................178
6.1 Indoor Unit PCB Abnormality ................................................................... 178
6.2 Drain Level Control System Abnormality.................................................. 179
6.3 Indoor Fan Motor or Related Abnormality ................................................ 180
6.4 Indoor Fan PCB Abnormality.................................................................... 185
6.5 Humidifier or Related Abnormality............................................................ 186
6.6 Thermistor or Related Abnormality........................................................... 187
6.7 Presence Sensor or Floor Sensor Abnormality ........................................ 188
6.8 Remote Controller Thermistor Abnormality .............................................. 189
6.9 Signal Transmission Error (Between Indoor and Outdoor Unit) ............... 190
6.10 Signal Transmission Error (Between Indoor Unit and Remote Controller)
................................................................................................................. 192
6.11 Signal Transmission Error (Between MAIN/SUB Remote Controllers) .... 193
6.12 Mismatching of Indoor Unit and Outdoor Unit .......................................... 194
7. Troubleshooting for Outdoor Unit............................................................195
7.1 Refrigerant Shortage ................................................................................ 195
7.2 Low-voltage Detection or Over-voltage Detection.................................... 198
Part 6
Service Diagnosis
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