GMV DC Inverter VRF
43
Fig. 4.7.2 Connection of modular units
Note:
①
For modular outdoor units, if there are multiple outdoor modules, then the master unit
must be the first outdoor module on the communication wire and should not connect
with IDU (master unit is set by SA8 of the outdoor main board).
②
For modular outdoor units, if there are multiple outdoor modules, then indoor units must
be connected with the last slave module of ODU (slave module is set by SA8 of the
outdoor main board).
③
Communication wire and power cord must be separated.
④
Communication wire must be of proper length. Extension is not allowed.
⑤
IDUs must be connected in series. The last IDU must be connected with the
communication matched resistance (supplied in the list of ODU spare parts).
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