Service Manual

Troubleshooting with LED SiUS121502E
100 Service Diagnosis
2. Troubleshooting with LED
2.1 Indoor Unit
Operation Lamp The operation lamp blinks when any of the following errors is detected.
1. When a protection device of the indoor or outdoor unit is activated, or when the thermistor
malfunctions.
2. When a signal transmission error occurs between the indoor and outdoor units.
In either case, conduct the diagnostic procedure described in the following pages.
FVXS series
BRC1E71/72/73
BRC7E830
In case of wireless remote controller, a signal receiver PCB and a display PCB are installed on
indoor unit. When the error occurs, the operation lamp on the display PCB blinks.
CTXS/FTXS series CDXS/FDXS series
(R13534)
Operation lamp
(green)
(R16589)
Operation lamp
(green)
Operation lamp (green)
(R21930)
Operation lamp (green)
(R18816)
The error or warning message also blinks on the basic screen.
