Advertisement
SiUS092230E
6.11 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
Detection
if signal transmission between indoor unit and remote controller (main and sub) is normal.
Error Decision
Normal transmission does not continue for specified period.
Conditions
Supposed
Connection of 2 main remote controllers (when using 2 remote controllers)
Defective indoor unit PCB
Causes
Defective remote controller
Transmission error caused by noise
Troubleshooting
Note
For the way to change MAIN/SUB setting of remote controllers, refer to pages 217 and 218.
Part 6 Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Using
YES
2 remote controllers
for 1 indoor unit?
NO
Do(es) the
NO
indoor unit service
monitor(s) blink?
YES
Replace the remote controller.
YES
Return to normal?
NO
Replace the indoor unit PCB.
NO
Return to normal?
YES
Troubleshooting for FDMQ, FFQ Series
Are both
YES
remote controllers set to
MAIN?
NO
Does
operation return to
NO
normal when the power is
turned off
momentarily?
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.
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)
153
Advertisement
