Daikin FTKS35D3VMW - Signal Transmission Error (on Outdoor Unit PCB)

Troubleshooting SiENBE12-713
274 Service Diagnosis
5.27 Signal Transmission Error (on Outdoor Unit PCB)
Remote Control
Display
U7
Outdoor Unit LED
Display
A5 1 1 2 4 3 4 4 4
Method of
Malfunction
Detection
Communication error between microcomputer mounted on the main PCB and PM1.
Malfunction
Decision
Conditions
" When the data sent from the PM1 can not be received successively for 9 sec.
" The abnormality is determined if the above fault conditions occurs once
" Fault counter is reset when the data from the PM1 can be successfully received.
Supposed
Causes
" Defective outdoor unit PCB
Troubleshooting
Replace the outdoor unit
PCB.
The cause can be an
external factor other than
the malfunction.
Monitor in long term.
(R5152)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Error again?
NO
YES
Turn the power off and turn it on
again.