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System Introduction
The central controller is an optional control component for users to monitor and control
operation of air conditioner in a centralized way.
The central controller can be used for unified management of the air conditioners in the
group/zone, querying and displaying on LCD the state of the main functions of the air
conditioner, weekly timer/simple timer setting or querying by keypad entry or setting of
main functions of air conditioner.
Communicate with the indoor unit in the central control network
It can communicate with the wired controller/indoor unit through RS485 communication
bus (shielded twisted pairs with polarity (A+ B-)). The indoor unit can be controlled centrally
or locally by using the wired controller, or centrally controlled by using converter (to be
purchased by users separately).
Control Diagram
1. Centrally or locally controlling the air conditioner using wired controller
···
···
A+
B-
Wired
controller
Indoor unit
2. Centrally controlling the air conditioner using converter board
RS485 shielded twisted pairs
···
···
A+
B-
Central box
Indoor unit
Notes:
1. The central box needs to be purchased by users separately.
2. The wired controller/central box on either end of the central
control system must be provided with terminal-matched resistor.
See the installation instructions for the wired controller/central box
for more details.
RS485 shielded twisted pairs
(with polarity, A+ B-)
Central controller
communication line
Central controller
power line
A+
B-
Wired
controller
Indoor unit
220V ~/50Hz
(with polarity, A+ B-)
Central controller
communication line
Central controller
power line
A+
B-
Central box
Indoor unit
220V ~/50Hz
Rs485 shielded twisted pairs
(with polarity, A+ B-)
L
N
A+
B-
GND
RS485 shielded twisted pairs
(with polarity, A+ B-)
N
L
A+
B-
GND
3
···
···
A+
B-
A+
Wired
Wired
controller
controller
Indoor unit
···
···
A+
B-
Central box
Indoor unit
Central controller
communication line
Indoor unit
connection line
B-
Indoor unit
Central controller
communication line
Central box
connection line
A+
B-
Central box
Indoor unit
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