GREE GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
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7.3.2 Connection of Communication Cables
The communication bus of indoor and ODUs must be connected in series instead of in star mode.
The last IDU of the bus shall be connected to a matching resistor (placed in the package of the ODU).
7.3.3 Communication Cable Connection Method and Procedure
Communication cable connection between the IDUs and ODUs
The communication cable between the IDUs and ODUs is connected via interface D1/D2 on the
terminal block XT2. Connection modes for the single-module system and multi-module system are
shown in the following figures.
Communication cable connection for the single-module system
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