Communication Circuit Between Indoor And Outdoor - Haier AV08NMSETA Service Manual

[26-0, 26-1, 26-2] Communication circuit between indoor and outdoor

If wiring between P and Q
is wrong or broken down
If wire of CN29 on outdoor
connecting board is normal
If wire of CN15 outdoor
connecting board is normal
If indoor and outdoor are
electrified at the same time
If communication wire is separate
from high-voltage wire on layout
If indoor quantity is correct
(check by rotary switch)
If there is noise source
If failure disappears after
changing indoor PCB
Check outdoor PCB, if faulty, replace it
No
Yes
No
Yes
Yes
Yes
No
No
No
60 60
Yes
Modify the communication wire
No
Modify the port
No
Connect power source
No
Change communication wiring type
Yes
Shut off power supply, and outdoor
searches for indoors again
Yes
Eliminate noise source