Gree GMV-PD100W/NAB-K, Service Manual

Page: 47 / 133

43
DC Inverter Multi
VRF Service Manual
DPOUSPM
7.2.5 Connection Between Controller and Unit
Communication network
The following is a brief sketch of communication net of multi variable units:
7.2.6 Connection between centralized controller and communication module
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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
ALL ON ALL OFF
PAGE
INDOOR UNIT
ERROR
AUTO
ROOM TEMP.
SWING SLEEP MELT
TIMER ON OFF
SET TEMP. ERR CODE
COOL DRY FAN HEAT AUTO LOW
CHECK
MONITORING
DETECTING
TEST
MID HIGH
CENTER ADDRESS
INITIALIZE SINGLE SELECT
CTRL MODE
SYS
SET
IN-
DOOR
DO
MAIN
c c
Mon. Tue. Wed.
Thu. Fri. Sat. Sun. Year Mon Date Hour Min
Fig.7.2.6.1 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
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