Caution for Diagnosis Si04-306
90 Service Diagnosis
1. Caution for Diagnosis
The Operation lamp flashes 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, disabling equipment operation.
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.
Location of
Operation Lamp
Troubleshooting
with the LED
Indication
The outdoor unit has one green LED (LED A) on the PCB. The flashing green LED indicates
normal condition of microcomputer operation.
Operation lamp (green)
HOME LEAVE lamp (red)
TIMER lamp (yellow)
ON/OFF switch
Air outlet
Indicator lamps
(R2837)
Outdoor Unit
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