One way cassette
type indoor unit
147
Signal Wiring Drawing
Outdoor units are of parallel connection via three lines with polarity. The main unit, central control and all indoor
units are of parallel connection 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 gure, (1-5 indoor
units). The indoor unit 5 is the wired control master unit (directly connected to the indoor unit of wired controller) and
others are the wired control slave units. Among them, the 4 indoor unit is this unit, the 3 indoor unit is the other DC
models, 1 indoor unit and 2 indoor unit are the AC models. The wired controller is connected with the master unit
and DC models through three lines with polarity. Other indoor units and the master unit are connected via two lines
with polarity. SW01 on the main unit is set to 0 while SW01 on other slave units are set to 1, 2, 3 and so on in turn.
(Please refer to the dip switch setting)
B. One wired controller controls one indoor unit, as shown in the above gure (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 gure (indoor unit 20). Either of the wired
controllers can be set to be the master wired control while the other is set to be the slave wired controller. The
master wired controller, slave wired controller and indoor units are connected via three lines with polarity.
(AC machine) (AC machine) (DC machine)
(This machine)
AP Q B C
AP Q B C AP Q B C AP Q B C AP Q B C AP Q B C
AP Q B CAP Q B CAP Q B CAP Q B CAP Q B C
AP Q B C AP Q B C AP Q B C AP Q B C AP Q B C
AP Q B CAP Q B CAP Q B CAP Q B CAP Q B C
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