Gree GMV-280WM/E-X - Page 42

GMV DC Inverter VRF
39
Fig. 4.6.1
4.6.2 Communication mode 8
CAN bus mode is taken for communication between IDU and ODU and communication
among IDUs.
4.6.3 Selection and connection mode of communication material
4.6.3.1 Select communication material
Note: if air conditioners are installed at places where there’s strong electromagnetic
interference, the communication wire of IDU and wired controller must use shielded wire and
the communication wire between IDU and IDU/ODU must use shielded twisted pair.
(1) Select communication wire between IDU and wired controller
Material type
Total length of
communication line
between IDU 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
60227-5:200
7
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 field or strong interference, it is
necessary to use shielded wire.