Service diagnosis
4
0
Domestic air conditioner
10.3.
9
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
Decision
Conditions
Supposed
Causes
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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The outdoor PCB broken leads to communication fault.
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The indoor PCB broken leads to communication fault.
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Communication wiring disconnected.
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The indoor PCB is broken.
■
The outdoor PCB is broken.