Gree CN851W1000, Service Manual

Page: 68 / 233

DC Inverter Multi
VRF Service Manual
63
CONTROL
6.2.5 Connection between centralized controller and communication module
Connection of them is shown in figure 6.2.5.1
Power
supply
Power
supply
Power
supply
Module 1
Module 2
Module 64
Connect to next module
Communication
wire
Air
conditioner
Air
conditioner
Air
conditioner
Multi-VRF
Centralized Controller
Communication
wire
Communication
wire
Fig.6.2.5.1 Skecth map of connection between centralized controller and communication module
Note:
① .
Communication module’s address can be set from 1 to 64. In order to avoid communication malfunction,
addresses can not be the same.
② . The communication wire of communication modules or centralized controller shall be equipped according to the
distance in the project.
③ . Gree provides a piece of 2-core communication wire of 1m (the user shall extend the wire according to actual
condition).
④ . The centralized controller and the communication module are connected together through a communication line
with a crystal connector at both ends. Close to the controller, a magnetic ring is needed on the communication line
and is approximately 10cm away from the crystal connector after wrapped two circles by the communication line.
During the installation, the magnetic ring should be put inside the electric control box after the crystal connector is
connected with the smart zone controller. See the following figure for the connection manner and location.