Communication With Inverter Module Failure - Haier AU082FYCRA(HW) Service Manual

[46] Communication with inverter module failure

Check if communication wire
between connecting board and
module is connected normally
In cooling mode, when the indoor
unit off if the EEV can't completely
Measure if voltage of CN28
on connecting board changes
by multimeter
Replace module
Y
close
N
Y
N
Re-connect
Y
Replace wire
N
Replace connecting board
84