Signal Transmission Error (Between Indoor Unit And Remote Controller) - Daikin CTXG09QVJUW Service Manual

SiUS121632EA
6.9 Signal Transmission Error (Between Indoor Unit and
Remote Controller)
U5
Error Code
Method of Error In case of controlling 1 indoor unit with 2 remote controllers, check the system using microcomputer
if signal transmission between indoor unit and remote controller (main and sub) is normal.
Detection
Error Decision Normal transmission does not continue for specified period.
Conditions
Supposed
Causes
Troubleshooting
Note: For the way to change MAIN/SUB setting of remote controllers, refer to pages 222 and 223.
Service Diagnosis
Connection of 2 main remote controllers (when using 2 remote controllers)
Defective indoor unit PCB
Defective remote controller
Transmission error caused by noise
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Using
2 remote controllers
for 1 indoor unit?
NO
Do the
service monitors of all
the indoor units
blink?
YES
Replace the remote controller.
Return to normal?
NO
Replace the indoor unit PCB.
Return to normal?
YES
Are both
YES
remote controllers set to
MAIN?
NO
Does
operation return
NO
to normal when the
power is turned off
momentarily?
YES
YES
NO
Troubleshooting for FFQ Series
YES
Set 1 remote controller to
SUB; turn the power supply
off once and then back on.
When using both wired and
wireless remote controllers for
1 indoor unit, make sure to set
the wireless remote controller
to SUB.
NO
Replace the indoor unit
PCB (control PCB).
There is possibility of
malfunction caused by noise.
Check the surrounding area
and turn on again.
Normal
There is possibility of
malfunction caused by noise.
Check the surrounding area
and turn on again.
Normal
(R24590)
157