SiUS121632EA Code Indication on Remote Controller
Service Diagnosis 133
4. Code Indication on Remote Controller
4.1 CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series
4.2 FFQ Series
Note: When there is a possibility of open phase power supply, also check power supply.
Error Codes Description Reference Page
00
Normal condition —
A1
Indoor unit PCB abnormality 135
A5
Freeze-up protection control/heating peak-cut control 137
A6
Indoor fan motor or
related abnormality
DC motor (CTXG, CTXS, FTXS, FVXS series)
138
AC motor (CDXS, FDXS series) 140
C4
Indoor heat exchanger thermistor or related abnormality 142
C7
Front panel open/close fault (CTXG series only) 143
C9
Room temperature thermistor or related abnormality 142
U4
Signal transmission error (between indoor unit and outdoor unit) 144
UA
Mismatching of indoor unit and outdoor unit 146
Error Codes Description Reference Page
00
Normal condition —
A1
Indoor unit PCB abnormality 147
A3
Drain level control system abnormality 148
A6
Indoor fan motor (DC motor) or related abnormality
(See the Note below.)
149
AF
Humidifier or Related abnormality 151
C4
Indoor heat exchanger thermistor 1 or related abnormality 152
C5
Indoor heat exchanger thermistor 2 or related abnormality 152
C9
Room temperature thermistor or related abnormality 152
CE
Presence sensor or floor sensor abnormality 153
CJ
Remote controller thermistor abnormality 154
U4
Signal transmission error (between indoor unit and outdoor unit) 155
U5
Signal transmission error (between indoor unit and remote
controller)
157
U8
Signal transmission error (between MAIN remote controller and
SUB remote controller)
158
UA
Mismatching of indoor unit and outdoor unit 159