GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
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III. Installation of the Communication System
The CAN communication network is adopted for GMV5 VRF system. Manual DIP or identification on
polarities of the communication power is not required for the IDU. Only the function DIP needs to be set
for the ODU. For details, see the description on function setting of the ODU.
1. Connection of Communication Cable Terminals
All connections for communication of GMV5 are fastened by screws.
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).
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