Aurora Service Manual

Code Indication on Remote Controller SiUS121737EA
147 Service Diagnosis
4. Code Indication on Remote Controller
4.1 RA Indoor Unit
4.2 SA Indoor Unit
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 149
A5 Freeze-up protection control, heating peak-cut control 151
A6
Indoor fan motor or
related abnormality
DC motor
(CTXG, FTXR, CTXS, FTXS, FVXS series)
152
AC motor (CDXS, FDXS series) 154
C4 Indoor heat exchanger thermistor or related abnormality 156
C7 Front panel open/close fault (CTXG, FTXR series only) 157
C9 Room temperature thermistor or related abnormality 156
U4 Signal transmission error (between indoor unit and outdoor unit) 158
UA Mismatching of indoor unit and outdoor unit 160
Error Codes Description Reference Page
00 Normal condition —
A1 Indoor unit PCB abnormality 161
A3 Drain level control system abnormality 162
A6
Indoor fan motor (DC motor) or related abnormality
(See the Note below.)
163, 165
A8 Indoor fan PCB abnormality 167
AF Humidifier or related abnormality 168
C4 Indoor heat exchanger thermistor 1 or related abnormality 169
C5 Indoor heat exchanger thermistor 2 or related abnormality 169
C9 Room temperature thermistor or related abnormality 169
CE Presence sensor or floor sensor abnormality 170
CJ Remote controller thermistor abnormality 171
U4 Signal transmission error (between indoor unit and outdoor unit) 172
U5
Signal transmission error (between indoor unit and remote
controller)
174
U8
Signal transmission error (between MAIN remote controller and
SUB remote controller)
175
UA Mismatching of indoor unit and outdoor unit 176