Service diagnosis
43 Domestic air conditioner
10.3.10 The communication fault between indoor and outdoor
Indoor display
■ ■ ★/ E7
outdoor display
LED1 flash 15 times
Method of
Communication is detected by checking the indoor PCB and the outdoor PCB.
Malfunction
Detection
Malfunction Ŷ
The outdoor PCB broken leads to communication fault.
Decision Ŷ
The indoor PCB broken leads to communication fault.
Conditions
Supposed Ŷ Communication wiring disconnected.
Causes Ŷ
The indoor PCB is broken.
Ŷ
The outdoor PCB is broken.
Ŷ
The Module PCB is broken.
Troubleshooting
* Caution
Be sure to turn off power switch before connect or disconnect connector, or else
parts damage may be occurred.
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