System Communication - Gree GMV-WQ72WM/A-F Owner's Manual

Water-cooled Heat Recovery DC Inverter VRF
Steps for power cord connection:
(1) Knock off the cross-through hole which is for passing through the power cord, with the
cross-through rubber ring on the hole. Then pass the cable through the hole. Connect L1, L2,
L3 of power cord and earth wire separately to the positions on wiring board (for power
supply) which are marked with L1, L2, L3 and the earth screw nearby.
(2) Fasten the power cord with cable tie.
(3) Wiring of power cable and communication wire for the ODU should refer to the marker of
circuit diagram on front cover of electrical box of ODU.

4.6 System Communication

4.6.1 Communication system includes:
(1) Communication among outdoor basic modules.
(2) Communication between ODU and IDU.
(3) Communication among IDUs.
(4) Communication between IDU and wired controller.
(5) Connection between IDU and light board receiver.
(6) Communication between different refrigeration systems.
(7) Graph of general communication connection.
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