Troubleshooting for Outdoor Unit SiBE18-821_C
414 Troubleshooting
7.28 Transmission Error between Main and Sub Remote
Controllers
Remote
Controller
Display
U8
Method of
Malfunction
Detection
In case of controlling with 2 remote controllers, check the system using microcomputer if signal
transmission between indoor unit and remote controller (main and sub) is normal.
Malfunction
Decision
Conditions
Normal transmission does not continue for specified period.
Supposed
Causes
Remote controller is set to “SUB” when using 1 remote controller.
Transmission error between main and sub remote controller
Connection of 2 sub remote controllers (when using 2 remote controllers)
Defective remote controller PCB
Troubleshooting
Using 2 remote
controller?
Is SS1 of
both remote
controllers set to
"SUB"?
Is SS1 of
remote controller PCBs
set to "SUB"?
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Set SS1 to "MAIN"; the
power supply off once and
then back on.
Set one remote controller
to "MAIN"; the power
supply off once and then
back on.
(R13048)
NO NO
Turn the power off and then
back on. If a malfunction
occurs, replace the remote
controller PCB.
NO
YES
YES
YES
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