![background image](http://html.mh-extra.com/html/carrier/xct-series/xct-series_installation-and-owners-manual_2560362023.webp)
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 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. One line control controls one indoor unit, as shown in the above figure (indoor unit 6-19). The indoor unit and the
line control are connected via three lines with polarity.
C. Two line controls control one indoor unit, as shown in the figure (indoor unit 20). Either of the line controls can be
set to be the master line control while the other is set to be the auxiliary line control. The master line control and
indoor units, and the master and auxiliary line controls 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 needn't to be
Electrical Wiring
outdoor 1
outdoor 2
outdoor 3
communication wire with polarity
Indoor 1 (AC)
Indoor 2 (AC)
Indoor 3 (DC)
control wire for wired controller
with polarity
Indoor 4 (DC)
Indoor 5 (DC)
Indoor 6
Indoor 7
Indoor 8
Indoor 9
Indoor 10
Indoor 11
Indoor 12
Indoor 13
Indoor 14
Indoor 15
Indoor 16
Indoor 17
Indoor 18
Indoor 19
Indoor 20
wired
controller
wired
controller
wired
controller
wired
controller
wired
controller
wired
controller
wired
controller
wired
controller
wired
controller
wired
controller
wired
controller
wired
controller
wired
controller
wired
controller
wired
controller
wired
controller
wired
controller
15
Summary of Contents for XCT Series
Page 33: ...The manufacturer reserves the right to change any product specifications without notice ...
Page 88: ...Le fabricant se réserve le droit de modifier les spécifications du produit sans préavis ...
Page 116: ...DerHerstellerbehältsichdasRechtvor ProduktspezifikationenohneVorankündigungzuändern ...
Page 144: ...Elfabricantesereservaelderechodecambiarcualesquieraespecificacionesdeproductosinprevioaviso ...
Page 172: ...O fabricante reserva se o direito de alterar as especificações do produto sem aviso prévio ...