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
