SiBE121123_A
Service Diagnosis 134
Part 6
Service Diagnosis
1. Troubleshooting with LED ...................................................................136
1.1 Indoor Unit............................................................................................136
1.2 Outdoor Unit .........................................................................................137
2. Problem Symptoms and Measures .....................................................138
3. Service Check Function ......................................................................139
3.1 RA Indoor Unit......................................................................................139
3.2 SA Indoor Unit ......................................................................................148
4. Code Indication on Remote Controller ................................................155
4.1 RA Indoor Unit......................................................................................155
4.2 SA Indoor Unit ......................................................................................155
4.3 Outdoor Unit .........................................................................................156
5. Troubleshooting for RA Indoor Unit.....................................................157
5.1 Indoor Unit PCB Abnormality ...............................................................157
5.2 Freeze-up Protection Control or Heating Peak-cut Control..................159
5.3 Fan Motor or Related Abnormality .......................................................161
5.4 Radiant Panel Temperature Rise, Indoor Electronic Expansion Valve
(Motor Operated Valve) Abnormality, Freeze-up Protection Control
(FVXG Series Only)..............................................................................165
5.5 Thermistor or Related Abnormality (RA Indoor Unit)............................167
5.6 Front Panel Open / Close Fault (FTXG Series Only) ...........................168
6. Troubleshooting for SA Indoor Unit.....................................................169
6.1 Indoor Unit PCB Abnormality ...............................................................169
6.2 Drain Level Control System Abnormality..............................................170
6.3 Fan Motor (AC Motor) or Related Abnormality.....................................171
6.4 Drain System Abnormality....................................................................172
6.5 Thermistor or Related Abnormality (SA Indoor Unit)............................173
6.6 Remote Controller Thermistor Abnormality ..........................................174
6.7 Signal Transmission Error
(between Indoor Unit and Remote Controller)......................................175
6.8 Signal Transmission Error
(between MAIN Remote Controller and SUB Remote Controller)........176
6.9 Field Setting Abnormality .....................................................................177
7. Troubleshooting for Outdoor Unit........................................................178
7.1 Refrigerant Shortage ............................................................................178
7.2 Low-voltage Detection or Over-voltage Detection................................180
7.3 Outdoor Unit PCB Abnormality or Signal Transmission Error ..............182
7.4 Unspecified Voltage (between Indoor Unit and Outdoor Unit) /
Anti-icing Control in Other Room..........................................................185
7.5 Anti-icing Control for Indoor Unit ..........................................................186
7.6 OL Activation (Compressor Overload) .................................................188
7.7 Compressor Lock .................................................................................190
7.8 DC Fan Lock ........................................................................................191
7.9 Input Overcurrent Detection .................................................................192
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