Signal Transmission Error (On Outdoor Unit Pcb) - Daikin ATXS35EV1B7 Service Manual

SiBE04-824
4.26

Signal Transmission Error (on Outdoor Unit PCB)

U7
Remote
Controller
Display
Method of Communication error between microcomputer mounted on the main PCB and PM1.
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
Service Diagnosis
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.
Defective outdoor unit PCB
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Turn off the power and turn it on
again.
Error again?
NO
YES
Troubleshooting
Replace the outdoor unit
PCB.
The cause can be an
external factor other than
the malfunction.
Monitor in long term.
(R7185)
127