Code Indication on Remote Controller
SiUS121736EA
149
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
A5
Freeze-up protection control, heating peak-cut control
A6
Indoor fan motor or
related abnormality
DC motor
(CTXG, FTXR, CTXS, FTXS, FVXS series)
AC motor (CDXS, FDXS series)
C4
Indoor heat exchanger thermistor or related abnormality
C7
Front panel open/close fault (CTXG, FTXR series only)
C9
Room temperature thermistor or related abnormality
U4
Signal transmission error (between indoor unit and outdoor unit)
UA
Mismatching of indoor unit and outdoor unit
Error Codes
Description
Reference Page
00
Normal condition
—
A1
Indoor unit PCB abnormality
A3
Drain level control system abnormality
A6
Indoor fan motor (DC motor) or related abnormality
(See the Note below.)
A8
Indoor fan PCB abnormality
AF
Humidifier or related abnormality
C4
Indoor heat exchanger thermistor 1 or related abnormality
C5
Indoor heat exchanger thermistor 2 or related abnormality
C9
Room temperature thermistor or related abnormality
CE
Presence sensor or floor sensor abnormality
CJ
Remote controller thermistor abnormality
U4
Signal transmission error (between indoor unit and outdoor unit)
U5
Signal transmission error (between indoor unit and remote
controller)
U8
Signal transmission error (between MAIN remote controller and
SUB remote controller)
UA
Mismatching of indoor unit and outdoor unit