Signal Transmission Error On Outdoor Unit Pcb - Daikin CTXU25G2V1B Service Manual

SiBE12-908

2.34 Signal Transmission Error on Outdoor Unit PCB

U7
Remote
Controller Display
Method of Communication error between microcomputer mounted on the main body and inverter.
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Service Diagnosis
When the data sent from the microcomputer of the inverter can not be received successively
for 9 seconds, the unit shuts down.
Fault counter is reset when the data from the microcomputer of the inverter can be
successfully received.
Defective outdoor unit PCB
Disconnection or breakage of harness between PCBs
Troubleshooting
160