Service Manual

Code Indication on Remote Controller SiUS121502E
114 Service Diagnosis
4. Code Indication on Remote Controller
4.1 CTXS, FTXS, CDXS, FDXS, FVXS Series
4.2 FFQ Series
: Error code displays automatically and system stops.
Inspect and solve the error.
: In the case of the shaded error codes, inspection is not displayed. The system
operates, but be sure to inspect and solve the error.
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 116
A5
Freeze-up protection control / heating peak-cut control 118
A6
Fan motor or related
abnormality
DC motor (CTXS, FTXS, FVXS series) 119
AC motor (CDXS, FDXS series) 121
C4
Indoor heat exchanger thermistor or related abnormality 123
C9
Room temperature thermistor or related abnormality 123
U4
Signal transmission error (between indoor unit and outdoor unit) 124
UA
Unspecified voltage (between indoor unit and outdoor unit) 126
Error Codes Description Reference Page
00
Normal condition —
A1
Indoor unit PCB abnormality 127
A3
Drain level control system abnormality 128
A6
Fan motor (AC motor) or related abnormality
(See the Note below.)
129
AF
Drain system abnormality 130
C4
Indoor heat exchanger thermistor 1 or related abnormality 131
C5
Indoor heat exchanger thermistor 2 or related abnormality 131
C9
Room temperature thermistor or related abnormality 131
CJ
Remote controller thermistor abnormality 132
U5
Signal transmission error (between indoor unit and remote
controller)
133
U8
Signal transmission error (between MAIN remote controller and
SUB remote controller)
134
UA
Field setting abnormality 135