Gree GMV-224WM/B-X, Service Manual

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GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
286
1.4.3.3 Interfaces and LEDs
POWER
RX
TX
V+ V- E RS232
Power cable
connector
DB9 Female Head
Connect the PC COM
R+ R-
RS485 cable connector
Data receiving
LED
C
5
3
Power LED
Data transmitting
LED
A B
SN Interface Name Description Remark
1
Power interface Input AC220V~50HZ; Output 12~30V DC
800mA Accompanied power
supply of the converter
2 Communication
interface Line A of RS485 connected to R+ on 485
terminal, and Line B connected to R-. RS232
port connected to RS232 on computer See related instructions
3
Power indicator Normally bright when it is energizing. See related instructions
4 Communication
indicator RX/TX indicator blinks during normal
communication. See related instructions
1.4.3.4 Dimensions
POWER
RX
TX
V+ V- E RS232
R+ R-
C
5
3
94mm
25mm
72mm
88mm
1.4.3.5 Cautions on Installation

It must be installed indoors. Avoid knock or exposure to sunshine or rain. It is suggested to place it in the monitoring
room together with the computer.

The manufacturer's original equipment must be used. Never use any other model or substitute product.

Independent power supply is required. Make sure to install adequate 220V AC socket for power supply.
1.4.4 Introduction of Optoelectronic Isolated Repeater
1.4.4.1. Function Introduction
Function of optoelectronic isolated repeater
1) To ensure the signal completeness and prevent the signal from attenuation under long distance communication when
the distance of the whole communication line exceeds 800m.
2) The general optoelectronic isolated repeater at present can support 32 nodes and ensure completeness of their
communication signals. When the communication nodes in the network exceed 32, the communication signal will become
incomplete. To ensure reliable transmission and completeness of the signals, we require that repeater must be used when
the number of nodes in the network exceeds 30.