Hardware - Gree A Series Service Manual

A Series Modular-type Air-cooled (Heat Pump) Chiller
not required and RS485 signal lines from BMS can be directly connected to the BMS port of
the control panel. When there are multiple units, signal lines from BMS are required to
connected to the BMS port through the patching board.
4.6.2.2 Communication Lines
Line Code
L1
L2
L3
R1
S= Standard O= Optional P= Purchased by users
4.6.3

Hardware

4.6.3.1 Parts List
Name
Optoelectronic
isolated repeater
Optoelectronic
isolated
converter
Category– 5 twisted pairs, two four-wire connectors, one
for the communication patching board, the other for the
unit.
Category-5 twisted pairs, two four-wire connectors
Category-5 twisted pairs, one four-wire connector for the
communication patching board, the other connector for
RS232–485 photoelectric converter.
DB9 serial port line
Model
RS485–W LN02200010
GD01 LN02200020
Description
Code
A repeater is required every
800m communication
distance or every 30
communication nodes
(control panels).
It is required when there is
no remote monitoring kit but
RS232 communication is
used.
54
Remarks
Type
S
S
O
S
Type
P
P