SiUS12-928_B Code Indication on Remote Controller
Service Diagnosis 144
4. Code Indication on Remote Controller
4.1 Indoor Unit
Error Codes Description Reference Page
00
Normal condition —
A1
Indoor unit PCB abnormality 146
A5
Freeze-up protection control or heating peak-cut control 148
A6
Fan motor or related abnormality
DC motor (CTXS/FTXS series)
150
AC motor (CDXS/FDXS series)
152
C4
Indoor heat exchanger thermistor or related abnormality 153
C9
Room temperature thermistor or related abnormality 153
U4
Signal transmission error (between indoor unit and outdoor unit) 154
UA
Unspecified voltage (between indoor unit and outdoor unit) 155
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