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Electrical Wiring
Signal Wiring Drawing
(AC-Sub Unit)
(AC-Sub Unit)
(AC/DC-Main Unit)
(DC-Sub Unit)
(DC-Sub Unit)
Outdoor units are parallelly connected via three lines with polarity. The main unit, central control and all
indoor units are parallelly connected via two lines without polarity.
There are three connecting ways between line control and indoor units:
A. One wired controller controls multiple units, i.e., 2-16 indoor units, as shown in the above figure (1-5
indoor units). Indoor unit 5 is the line-controlled master unit and others are slave units. The remote
controller and the master unit (directly connected to the indoor unit of the wired controller) are connected
via three lines with polarity. Other indoor units and master unit are connected via two lines or three lines
with polarity (If the PCB of indoor is DC, the wired controller needs to be connected to ABC, and if the
PCB of indoor is AC, the wired controller only connects to BC.). SW01 on the master unit of line control
is set to 0 while SW01 on the slave units of line control are set to 1,2,3, and so on in turn.(Please refer
to the code setting page.) B. One wired controller controls one indoor unit, as shown in the above figure
(indoor unit 6-19). The indoor unit and the wired controller are connected via three lines with polarity.
C. Two wired controllers control one indoor unit, as shown in the figure (indoor unit 20). Either of the
wired controllers can be set to be the master wired controller while the other is set to be the auxiliary
wired controller. The master wired controller and indoor units, and the master and auxiliary wired
controllers are connected via three lines with polarity.
When the indoor units are controlled by the remote control, switch over the modes by Switching Mode
of Line-Controlled Main Unit/ Line-Controlled Sub Units/ Remote-Controlled Types. The signal terminals
need not be equipped with wires and connected to the line control.
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