Troubleshooting for SA Indoor Unit - FFQ, FCQ, FDBQ, FBQ, FHQ Series SiBE121021_C
330 Service Diagnosis
6.9 Signal Transmission Error (between MAIN Remote
Controller and SUB Remote Controller)
Remote
Controller
Display
U8
Method of
Malfunction
Detection
In case of controlling with 2 remote controllers, check the system using micro-computer if signal
transmission between indoor unit and remote controller (main and sub) is normal.
Malfunction
Decision
Conditions
The error is generated when the microprocessor detects that the transmission between the
indoor unit and the remote controllers (MAIN and SUB) is not normal over a certain amount of
time in case of controlling with 2 remote controllers.
Supposed
Causes
îš„
Transmission error between MAIN remote controller and SUB remote controller
îš„
Connection among SUB remote controllers
îš„
Defective remote controller PCB
Troubleshooting
Turn the power off and then
back on. If a malfunction occurs,
replace the remote controller
PCB.
Set one remote controller to
"MAIN"; the power supply off
once and then back on.
Set SS1 to "MAIN"; the power
supply off once and then back
on.
YES
NO
YES
NO NO
YES
(R13010)
Using 2 remote
controllers?
Is SS1 of
remote controller PCB
set to "SUB"?
Is SS1 of both
remote controllers
set to "SUB"?
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
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