7.4.10 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
■ The outdoor PCB broken leads to communication fault
Malfunction
Decision
■ The indoor PCB broken leads to communication fault
Conditions
Supposed
■ Communication wiring disconnected
Causes
■ The indoor PCB is broken
■ The outdoor PCB is broken
■ The Module PCB is broken
Troubleshooting
* Caution Be sure to turn off power switch before connect or disconnect connector,
HSU09VHG(DB)-SM
else parts damage may be occurred.
60
Service Diagnosis
Domestic Air Conditioner
or