SiUS281811EA Main/Sub Setting
Part 3 Remote Controller 91
1. It is not possible to change the Main/Sub setting from Main to Sub when only one remote
controller is connected.
2. When 2 remote controllers are being used, it is not possible to change the setting from Main to
Sub if one of the remote controllers is already set as Main.
3.2 When Wireless Remote Controller is Used Together
When using both a wired and a wireless remote controller for 1 indoor unit, the wired controller
should be set to Main. Therefore, the Main/Sub switch (SS1) of the signal receiver PCB must be set
to Sub.
Main/Sub Main Sub
Main/Sub switch
(SS1)
Transmitter assembly
1
2
3
M
S
SS2
SS1
The side painted black indicates
the switch knob position.