Service Manual

Troubleshooting with LED SiUS071735E
55 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.
With wired remote controller (BRC1E73)
With wireless remote controller (BRC082A43)
In case of wireless remote controller, a receiver is installed. When the error occurs, the operation
lamp on the receiver blinks.
2.2 Outdoor Unit
The outdoor unit has one green LED (LED A) on the PCB. When the microcomputer works in order,
the LED A blinks. (Refer to pages 12, 13 for the location of LED A.)
Operation lamp (green)
(R23942)
+The error or warning message also blinks on the basic screen.
+
(R25009)
Operation lamp
(red)