[44/06]communication circuit between indoor and outdoor
Part 3
yes
if wiring between P and
Q is wrong or broken down
no
no
no
no
yes
yes
yes
if the port of CN15 on
indoor PCB is normal
if the port of CN19 on outdoor
connecting board is normal
if outdoor power source is normal
if power supply is failure
yes
if there is noise
no
yes
modify the communication wire
modify the port
electrify the outdoor
clear the failure code
no
check and eliminate noise
check outdoor PCB, if faulty, replace it
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