Gree GMV-Pdm450W/NaB-M

DC Inverter Multi
VRF Service Manual
129
7.3.3.2 Communication Mode of GREE D.C. Inverter Units
1). All communication modes are 485 communications.
2). Network of indoor units: outdoor unit ←→indoor unit to indoor unit←→2-pin twisted wire is applied for
communication among indoor units and its both ends are 3-pin XH plugs.(2
nd
and 3
rd
positions are applied and shall be
corresponding).
3). Network of outdoor units: module←→2-pin twisted wire is applied for communication among indoor units and
its both ends are 4-pin XH plugs(2nd and 3rd positions are applied and shall be corresponding).
7.3.3.3 Communication Address Setting
Communication address setting includes: address setting of indoor units, address setting of wired controller, address
setting of communication of outdoor units,qty setting of outdoor modules and address setting of communication of patch
boards.
7.3.4 Connection of Communication System.
7.3.4.1 Communication among modules is realized by communication wire on mainboard of each module.
Directly connect mainboard by 2-pin and 4-port communication wire to realize communication among outdoor
modules. The communication interface ports on mainboard are CN16, CN17 and CN18,each of which are available.
A
B
A
B
1234
ON DIP
12
ON
123123 123
ON DIPONDIP ON DIP
12
ON
NO.1 MODULAR
A
B
A
B
A
B
1234 12 12
A
B
A
B
A
B
A
B
A
B
�
�
44
2
2
2
2
22
2
22
A
B
A
B
4
NO.2 MODULAR
Inverter drive plate
inside the unit
Inverter drive
plate inside
the unit
Capacity code SW1
Qty code
SW2
Address
code SW3
ON DIPONON
Capacity code SW1
Qty code
SW2
Address
code SW3
Mian board
of out unit
Mian board
of out unit
Communication
inerface
Communication
inerface
Communication
inerface
Communication
inerface
Communication
inerface
CN11
CN12
CN13
Communication
inerface
CN11
CN12
CN13
CN16
CN17
CN18
Communication
inerface
CN16
CN17
CN18
CN1 or
COM-OUT3
CN3
CN2
Communication
inerface
Communication
inerface
CN3
CN2
CN1 or
COM-OUT3
CN1
Communication
inerface
Communication
inerface
CN3
CN2
CN1
Communication
inerface
CN1
Address code S2 Address code S2 Address code S2
Pinboard 1 Pinboard 2
Pinboard 3
No.1 No.2
No.n(16max)
No.1 No.2
No.n(16max)
Indoor to indoor communiction 1
Indoor to indoor communiction 2
To next
modular