Service Manual

Troubleshooting for CTXS, FTXS, CDXS, FDXS, FVXS Series SiUS121502E
116 Service Diagnosis
5. Troubleshooting for CTXS, FTXS, CDXS, FDXS,
FVXS Series
5.1 Indoor Unit PCB Abnormality
Error Code
A1
Method of Error
Detection
The system checks if the circuit works properly within the microcomputer of the indoor unit.
Error Decision
Conditions
The system cannot set the internal settings.
Supposed
Causes

Wrong models interconnected

Defective indoor unit PCB

Disconnection of connector

Reduction of power supply voltage