636
[06] Communication circuit between indoor and outdoor
If wiring between P and
Q is wrong or broken down
Yes
No
No
No
Yes
Yes
Yes
No
Yes
No
No
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
If there is noise
Modify the communication wire
Modify the port
Electrify the outdoor
Clear the failure code
Check and eliminate noise
Check outdoor PCB, if faulty, replace it
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