Daikin FTXS20G2V1B - Signal Transmission Error on Outdoor Unit PCB; (50 Class Only)145; Signal Transmission Error on Outdoor Unit PCB (50 Class Only)

Troubleshooting SiENBE04-808_A
145 Service Diagnosis
4.26 Signal Transmission Error on Outdoor Unit PCB
(50 Class Only)
Remote Control
Display
U7
Method of
Malfunction
Detection
Communication error between microcomputer mounted on the main microcomputer and PM1.
Malfunction
Decision
Conditions
 The abnormality is determined when the data sent from the PM1 can not be received for 9
seconds.
 The error counter is reset when the data from the PM1 can be successfully received.
Supposed
Causes
 Defective outdoor unit PCB
Troubleshooting
(R7185)
Caution
NO
YES
Turn off the power and turn it on
again.
Error again?
Replace the outdoor unit
PCB.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
The cause can be an
external factor other than
the malfunction.
Observe the operating
condition in long term.
SiENBE04-808_A.pdf 157 21/02/2011 13:20:03