Troubleshooting by Remote Controller
SiUS281117
Service Diagnosis
169
2.47 Transmission Error (between Main and Sub Remote
Controllers)
Remote
Controller
Display
U8
Applicable
Models
All indoor models
Method of Error
Detection
In case of controlling with 2-remote controller, check the system using micro-computer if signal
transmission between indoor unit and remote controller (main and sub) is normal.
Error Decision
Conditions
The error is generated when, in case of controlling with 2 remote controllers, the micro-
processor detects that the transmission between the indoor unit and the remote controllers
(MAIN and SUB) is not normal over a certain amount of time.
Supposed
Causes
Transmission error between main and sub remote controller
Connection between sub remote controllers
Defective remote controller PCB
Troubleshooting
Controlling
with 2-remote controller
SS-1 switch
on remote controller PCB is
turned to MAIN
Both SS-1
switches on remote
controllers are turned
to SUB
Is there
continuity in remote
controller wiring?
Turn the SS-1 switch of
one remote controller to
MAIN.
Turn OFF the power
supply, and restart
operation.
NO
NO
NO
YES
Turn OFF the power once and
restart operation.
Replace the remote controller
PCB if any error is generated.
Replace the remote
controller wiring.
NO
YES
YES
Turn the SS-1 switch of
one remote controller to
MAIN.
Turn OFF the power
supply, and restart
operation.
YES
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
