Carrier 40VC009F-7S-QEE Installation And Owner's Manual page 24

Electrical Wiring
Signal wiring drawing
outdoor 1
P Q A B C
Communication wire between
indoor & outdoor without polarity
Indoor 1
(AC machine)
P Q A B C
Indoor 6
P Q A B C
Indoor 11
P Q A B C
Indoor 16
P Q A B C
Outdoor units have parallel connections via three lines with polarity. The main unit, central control, and all indoor units
have parallel connections via two lines without polarity.
There are three connecting ways between the 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).
The indoor unit 5 is the line-controlled master unit and others are the slave units. The remote controller and the master
unit(directly connected to the indoor unit of 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, while the PCB of indoor is AC, the wired controller only connects to BC.). SW01 on
the mater 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. Onewired controller controls one indoor unit, as shown in the above figure (indoorunits 6–19).The in door unit and
the wired controller are connected via three lines withpolarity.
C. Two wired controllers control one indoor unit, as shown in the figure (indoor unit 20). Either of the controllers can be
set to be the master controller while the other is set to be the auxiliary controller. The master wired controller and indoor
units, and the master and auxiliary wired controller are connected via three lines withpolarity.
outdoor 2 outdoor 3
Indoor 2 Indoor 3
(AC machine)
P Q A B C
Indoor 7 Indoor 8
P Q A B C
wired wired
controller controller
Indoor 12 Indoor 13
P Q A B C
wired wired
controller controller
Indoor 17 Indoor 18
P Q A B C
wired wired
controller controller
Communication wire with polarity
Indoor 4
(DC machine)
(DC machine)
P Q A B C P Q A B C
Indoor 9
P Q A B C P Q A B C
wired
controller
Indoor 14
P Q A B C P Q A B C
wired
controller
Indoor 19
P Q A B C P Q A B C
wired
controller
17
control wire for wired controller
with polarity
Indoor 5
(Master DC or AC)
P Q A B C
wired
controller
Indoor 10
P Q A B C
wired
controller
Indoor 15
P Q A B C
wired
controller wired
controller
Indoor 20
P Q A B C
wired
controller
wired
controller
wired controller
wired
controller