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9
COMMUNICATION SYSTEM INTRODUCTION
GMV6 DC Inverter VRF system adopts CAN communication network, manual DIP switch and polarity to
distinguish communication cord is needless for IDU and just set function DIP for ODU.
9.1 Connection method of communication cord terminal
The connection of all communication is fixed by screws.
wiring screw
terminal board
9.2 Material and wiring method of communication cord
9.2.1 Communication material
If the air conditioning unit is installed in a place with strong electromagnetic interference, the
communication line between the indoor unit and the wired controller must adopts shielded wires; the
communication line between indoor units (between indoor unit and outdoor unit) must use the shielded
twisted pairs.
(1) Selection of communication line between indoor unit and wired controller.
Material type
Total length of
communication line
between indoor unit and
wired controller L (m)
Wire size (mm
2
)
Material
standard
Remarks
Light/Ordinary
polyvinyl chloride
sheathed cord.
(60227 IEC 52
/60227 IEC 53)
L≤250 2×0.75~2×1.25
IEC 60227-
5:2007
1.Total length of communication line can't
exceed 250m.
2.The cord shall be Circular cord (the cores
shall be twisted together).
3.If unit is installed in places with intense
magnetic eld or strong interference, it is
necessary to use shielded wire.
The connection between the indoor unit and the wired controller is shown as below:
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