Connection Way And Procedures Of Communication Cable; Connection Of Communication Cable Between Odu And Idus/Hydro Box - Gree GMV-S120WL/A-S Service Manual

12.3 Connection Way and Procedures of Communication Cable

12.3.1 Connection of communication cable between ODU and
IDUs/hydro box
Open the electric box cover of ODU, IDU and hydro box. The communication wire goes to the
electric box from the hole. Connect the wires of ODU, IDUs and hydro box according to the wiring
diagram stuck on the unit. The selection of specifications of power cable please refer to the unit's
power capacity, installation environment. After confirmation, the connection of ODU, IDUs and
hydro box are arranged through D1/D2 port of wiring board XT2. Then install the electric box cover.
Please refer to the following figure:
Note:
① The communication cable and power cable must be laid separately to avoid interference.
② The communication cable must be long enough to avoid joints.
③ Indoor units and hydro box must be connected in series. The last IDU shall be connected
to a matching resistor (placed in the package of the ODU).
GMV5 Home DC Inverter Multi VRF Units
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