Signal Transmission Error On Outdoor Unit Pcb (35 Class Only); Signal Transmission Error On Outdoor Unit Pcb - Daikin FTXL20G2V1B Service Manual

SiENBE04-925_A

4.26 Signal Transmission Error on Outdoor Unit PCB

(35 Class Only)
U7
Remote Control
Display
Method of Communication error between microcomputer mounted on the main microcomputer and PM1.
Malfunction
Detection
„ The abnormality is determined when the data sent from the PM1 can not be received for 9
Malfunction
Decision
„ The error counter is reset when the data from the PM1 can be successfully received.
Conditions
„ Defective outdoor unit PCB
Supposed
Causes
Troubleshooting
Turn off the power and turn it on
again.
Service Diagnosis
seconds.
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Error again?
NO
YES
Troubleshooting
Replace the outdoor unit
PCB.
The cause can be an
external factor other than
the malfunction.
Observe the operating
condition in long term.
(R7185)
117