SiBE121021_C Troubleshooting for SA Indoor Unit - FFQ, FCQ, FDBQ, FBQ, FHQ Series
Service Diagnosis 329
6.8 Signal Transmission Error (between Indoor Unit and
Remote Controller)
Remote
Controller
Display
U5
Method of
Malfunction
Detection
Microcomputer checks if transmission between indoor unit and remote controller is normal.
Malfunction
Decision
Conditions
The error is generated when the micro-processor detects that the transmission between the
indoor unit and the remote controller is not normal over a certain amount of time.
Supposed
Causes
îš„
Defective remote controller
îš„
Defective indoor unit PCB
îš„
External cause (noise...)
îš„
Connection of 2 master remote controllers (when using 2 remote controllers)
Troubleshooting
Normal
Normal
There is possibility of
malfunction caused by noise.
Check the surrounding area and
turn on again.
Set one remote controller to
"SUB"; turn the power supply off
once and then back on.
Replace the indoor unit PCB.
There is possibility of
malfunction caused by noise.
Check the surrounding area and
turn on again.
NO
YES
YES
Return to normal?
Return to normal?
NO
YES
YES YES
NO NO
NO
NO
YES
(R13008)
Using 2 remote
controllers?
Is SS1 of
both remote controllers
set to "MAIN"?
Operation
returns to normal when
the power is turned off
momentarily.
All indoor PCB
microcomputer monitors
blink?
Replace the remote controller.
Replace the indoor unit PCB.
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
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