Gree GMV-224WM/G-X Owner's Manual page 51

GMV DC Inverter VRF
Fig.3.9.7 Connection of single unit
Fig.3.9.8 Connection of modular units
NOTES!
① As for modular indoor unit, if there are multiple outdoor unit modules, the master module
must be the first outdoor unit module on the communication line, and it must not connect to
the indoor unit (main module is set by SA8 of indoor unit main board).
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