SiBE07-618_C
Caution for Diagnosis
Service Diagnosis
55
1. Caution for Diagnosis
1.1
Troubleshooting with LED
Indoor Unit
The operation lamp blinks when any of the following errors is detected.
1. When a protection device of the indoor unit or the outdoor unit is activated, or when the
thermistor malfunctions.
2. When a signal transmission error occurs between the indoor unit and the outdoor units.
In either case, conduct the diagnostic procedure described in the following pages.
Outdoor Unit
The outdoor unit has one green LED (LED A) on the PCB. When the LED A blinks, the
microcomputer works in order.
(R4134)
Operation lamp
(green)
LED-A
LED A
(R6980)
