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Troubleshooting for FDMQ, FFQ Series
6.12 Signal Transmission Error (Between MAIN/SUB Remote
Controllers)
U8
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 MAIN remote controller and SUB remote controller is normal.
Error Decision
Normal transmission does not continue for specified period.
Conditions
Supposed
Remote controller is set to SUB when using 1 remote controller
Connection of 2 SUB remote controllers (when using 2 remote controllers)
Causes
Defective remote controller PCB
Troubleshooting
Note
For the way to change MAIN/SUB setting of remote controllers, refer to pages 217 and 218.
154
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Using 2 remote
NO
controllers for 1
indoor unit?
YES
NO
Are both remote
controllers set to
SUB?
YES
Is the
NO
remote controller set to
MAIN?
YES
SiUS092230E
Set the remote controller to
MAIN; turn the power supply off
and then back on.
Turn the power off and then
back on. If a malfunction occurs,
replace the remote controller.
Turn the power off and then
back on. If a malfunction occurs,
replace the remote controller.
Set one remote controller to
MAIN; turn the power supply off
once and then back on.
(R24058)
Part 6 Service Diagnosis
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