Service Check Function SiBE12-908
103 Service Diagnosis
1. Service Check Function
1.1 Failure Diagnosis with Multi-Colored Indicator Lamp
The multi-colored indicator lamp on the display of the indoor unit flashes when any of the
following failure is detected.
1. When a protection device of the indoor or outdoor unit is activated or when the thermistor
malfunctions and the unit does not work.
2. When a signal transmission error occurs between the indoor and outdoor units.
For detailed troubleshooting, refer to the following pages “Troubleshooting” (P.107~).
1.2 Failure Diagnosis by LED Indication
The following failure diagnosis can be done by LED indication on the outdoor unit PCB.
1. The outdoor unit has a green LED(LED A) on the PCB. (Refer to page 11.)
The flashing green LED indicates "in order" condition.
The turned ON or OFF LED indicates the failure related to the microcomputer.
PCB is set upside down (with backside up).
LED A can be visually inspected through a inspection slit.
(R9419)
Multi-colored
indicator lamp
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