128
DC Inverter Multi
VRF Service Manual
7.3.2Wiring Sketch Map between Indoor Unit
Outdoor unit
Indoor unit A Indoor unit B Indoor unit N
Power supply
3N~380V
50Hz
Power supply
3N~380V
50Hz
Power supply
3N~380V
50Hz
Power supply
3N~380V
50Hz
L1 L2 L3 N
Terminal board Terminal board Terminal board Terminal board
2-core
communication
line
2-core
communication
line
2-core
communication
line
Wiring
(resistor matching)
Note: the diagram is our single-phase indoor unit, the power supply wiring is subject to the actual condition if there is 3-phase indoor unit.
Notes:
a. The last indoor unit requires to install another communication line as wiring (resistor matching);
b. Both the communication lines of outdoor units and indoor units are cascade connection.
c. Connect the communication lines of indoor units and out units according to the above diagram.
7.3.3 Connection of communication line
7.3.3.1 Communication of GREE D.C. inverter units includes:
1).Communication between outdoor unit and indoor unit;
2).Communication among indoor units;
3).Communication among outdoor units (modules combination);
4).Communication among patch boards of outdoor units (when the patch boards need to be added.).
5).Communication Connection Diagram
The communication among modules is connecting
in engineering installation
The communication
between indoor unit and patch board and the communication among
indoor units are
connecting in engineering installation
Patch boardP atch board
Module 1 Module 2
Mainboard Mainboard
Driving
board of
compressor
Driving board
of fan
Driving
board of
compressor
Driving board
of fan
Mainboard of
indoor unit
Mainboard
of indoor unit
Mainboard of
indoor unit
Mainboard of
indoor unit
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