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a. Interface of the Power Supply
T he interface CN1 of the power supply module board is for the connection board of the external
① .
power cord, the terminal AC-N for the neutral line, the terminal AC-L for the live line and the middle terminal
keeps open.
T he interface CN4 of the power supply module board which is for the power supply of the display
② .
board, is connected with the interface CN1 of the display board through the two-core wire.
b.Communication Interface
The interfaces CN2, CN3, CN4 and CN5 of the display board are for communication, and CN2 namely
COM4 is for the communication o the duct type unit (2-pin).
7.1.3 Preparation and Connection of the Communication Line
a. The communication line between the centralized controller and the unit should be prepared by the user
according to the actual project.
b. Preparation and connection of the communication line.
T he communication line is the two-core line (one end is the two-core head and the other end
① .
is the crystal head. (code: 40113325,
W here there are N sets of units, then N+1 communication lines are needed.
② .
C onnect the two-core head of one communication line to the port COM4 of the smart centralized
③ .
controller and connect the two-core heads of N communication lines to the two-pin socket of the wired controller
of the New UNI DC Inverter Series.
T he user can prepare the extension line and connect the wires inside the crystal head according to the
④ .
actual need.
Note: one set of New UNI DC Inverter Series consists of one outdoor unit and one indoor unit.
7.1.4 Installation
The installation can proceed on when the installation location is selected and the installation steps are as
follows:
a. Firstly make sure where to install the smart centralized controller.
b. Embed the power supply box (2) as Fig.7.6 for the installation of the bottom case (3).
c. Connect the power cord and the communication line of the display board and then let both go through
the power supply box (2).
d. Fix the bottom case on the power box (2) by screws.
e. Tidy up the power cord and the communication line inside the smart centralized controller.
f. Close the cover (5).
legth: 1m).
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