Haier AB072MRERA Service Manual page 125

The combination of multiple indoor units can be controlled by wired controller or remote controller.
※ Switching mode of Wired control master unit/ Wired control slave unit/ remote control types can be used for
switching over ※
Setting
mode
Socket/dip
switch
SW01-[2][3][4]
CN21 socket
Terminal block (control)
Note:
The wiring for the power line of indoor unit, the wiring between indoor and outdoor units as well as the wiring
between indoor units:
Items
Cross
Total section
2
current of (mm
indoor units (A)
<10 2
≥10 and <15 3.5
≥15 and <22 5.5
≥22 and <27 10
※ The electrical power line and signal lines must be fastened tightly.
※ Every indoor unit must have the ground connection.
※ The power line should be enlarged if it exceeds the permissible length.
※ Shielded lays of all the indoor and outdoor units should be connected together, with the shielded
lay at the side of signal lines of outdoor units grounded at one point.
※ It is not permissible if the whole length of signal line exceeds 1000m.
Signal wiring of wired controller
Length of signal line (m)
≤ 250
※ The shielding lay of the signal line must be grounded at one end.
※ The total length of the signal line shall not be more than 250m.
Wired control master unit Wired control slave unit
All OFF
Null
A,B,C connect with wired
controller
Rated
Length current of
(m) overflow
)
breaker (A)
20 20
25 30
30 40
40 50
0.75mm
[0][0][1]
Null
B,C connect with wired
controller
Rated current of residual circuit
breaker (A)
Ground fault Interrupter (mA)
Response time (S)
20 A, 30 mA, 0.1S or below
30 A, 30 mA, 0.1S or below
40 A, 30 mA, 0.1S or below
50 A, 30 mA, 0.1S or below
Wiring dimensions
2
×3 core shielded line
117
Remote control
All OFF
Connect to remote receiver
A,B,C null
Cross sectional
area of signal Line
Outdoor Indoor
2
-indoor (mm ) -indoor (mm
2 cores×(0.75-2.0)
2
mm shielded line
2
)