Service Diagnosis
47
All-in-one board
Indoor display E7 outdoor display LED2 flash 15 times
Communication is detected by checking the indoor PCB and the outdoor PCB.
The outdoor PCB broken leads to communication fault.
The indoor PCB broken leads to communication fault.
Communication wiring disconnected.
The indoor PCB is broken.
The outdoor PCB is broken.
* Caution: Be sure to turn off power switch before connect or disconnect connector,
or else parts damage may be occurred.
The outdoor PCB needs
dehumidification
Is it normal after
restart the AC?
If starting up
normally, but
malfunction occurs
again after a while
The outdoor PCB needs
dust
NO
YES
NO
YES
YES
Reconnect the
connecting
cable or replace
with a new one.
NO
Supposed
Causes
Malfunction
Decision
Conditions
Method of
Malfunction
Detection
Check whether the linking cable
between the indoor and outdoor is
well connected or whether its core
wires are well insulated or its L/N is
not reversed.
Trouble
shooting
