Gree GMV-PD100W/NAB-K, Service Manual

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DC Inverter Multi
VRF Service Manual
DPOUSPM
a.Interface of the Power Supply
The interface CN1 of the power supply module board is for the connection board of the external power
cord, the terminal AC-N for the neutral line, the terminal AC-L for the live line and the middle terminal keeps
open.
The interface CN4 of the power supply module board which is for the power supply of the display board, is
connected with the interface CN1 of the display board through the two-core wire provided by Gree.
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); CN5, CN4, CN3 namely COM1, COM2, COM3
respectively are for the communication of the multi VRF system (3-pin).
6.5.1.3 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 for the multi VRF system
1 ) One three-core communication line is needed to connect one set of multi VRF system to one interface
(COM1, COM2 or COM3) of the smart zone controller.
2 ) One end of the communication line is connected with the smart zone controller and the other is
connected with the three-pin socket of the indoor unit.
c. Preparation and connection of the communication line for the duct type unit
1 ) The communication line for the duct type unit is the two-core line provided by Gree (one end is the two-
core head and the other end is the crystal head, code: 40113325)
2 ) Where there are N sets of duct type units, then N+1 communication lines are needed.
3 ) Connect the two-core head of one communication line to the port COM4 of the smart zone controller
and connect the two-core heads of N communication lines to the two-pin socket of the wired controller of
the duct type unit.
4 ) The user can prepare the extension line and connect the wires inside the crystal head according to the
actual need.
Note: one set of Multi VRF system consists of one multi VRF outdoor unit and one or more than one
multi VRF indoor units. And one set of duct type unit consists of one duct type outdoor unit and one
duct type indoor unit.
6.5.1.4 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 zone controller.
b. Embed the power supply box (2) as Fig.5.5.6 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 zone controller.
f. Close the cover (5)
Fig.6.5.4 Concealed Cable Installation 1 (right-left wiring)