Troubleshooting with LED SiBE041525F
45 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.
2.2 Outdoor Unit
The outdoor unit has a green LED (LED A) on the PCB. When the microcomputer works in
order, the LED A blinks. However, the LED A turns OFF while the standby electricity saving
function is activated and the power supply is OFF. (Refer to page 12, 13 for the location of LED
A.)
Operation lamp
(green)
(R23077)
ON/OFF
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