Haier MRV Serie Instrucciones De Instalación página 16

ELECTRICAL WIRING
Signal Wiring Drawing
Outdoor
Indoor 1
Indoor 4
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 ways of connecting the line control and indoor units:
A. One wired control to control multiple units, i.e. 2-9 indoor units, as shown in the above figure, (1-3 indoor units). The
indoor unit 3 is the wire controlled main unit and others are the wired controlled sub units. The remote control and the
main unit (directly connected to the indoor unit of wired control) are connected via three wires with polarity. Other
indoor units and the main unit are connected via three lines with polarity. SW01 on the main unit of wired control is set
to 0 while SW01 on other sub units of wired control are set to 1, 2 and so on in turn. (Please refer to the code setting A
at page 14)
B. One wired control controls one indoor unit, as shown in the above figure (indoor unit 4-8). The indoor units and the
wired control are connected via three lines with polarity.
C. Two wired controls control one indoor unit, as shown in the figure (indoor unit 9). Either of the wired controls can be set
to be the main wired control while the other is set to be the auxiliary wired control. The main wired control and indoor
units, and the main and auxiliary line controls are connected via three lines with polarity.
Note: For DC motor/low ESP duct type, the PCB comes with the terminal blocks. Please be sure to pay attention to do
the wiring according to the labels. The power lines and signal lines go through the metal wire hole separately with the
protective sleeve of the connecting line.
16
P Q
Communication wire between indoor
and outdoor without polarity
Indoor 2
A B C P Q
Indoor 5
P Q A B C
A B C
Wired controller
Indoor 7 Indoor 8
P Q A B C
A B C
Wired controller
Control wire for wired controller with polarity
Indoor 3
P Q A B C P Q A B C
Indoor 6
P Q A B C P Q A B C
A B C
Wired controller
Indoor 9
P Q A B C P Q A B C
A B C
Wired controller
Wired controller Wired controller
A B C
Wired controller
A B C
Wired controller
A B C A B C
31-5000500 Rev. 0