H2SM-(9+12)HEK03/R2
Service Diagnosis
Domestic Air Conditioner
52
7.4.4 Communication fault between indoor and outdoor system
Indoor Display E7
Method of Malfunction
Detection
Communication is detected by checking the indoor board and outdoor board
Malfunction Decision
Conditions
The outdoor PCB broken leads to communication fault
The indoor PCB broken leads to communication fault
Supposed Causes
The outdoor PCB is broken
The indoor PCB is broken
Communication wiring disconnected
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* Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may
be occurred.
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