Gree GMV-680WM/E-X Manuel D'utilisateur page 49

Note:
①Wired controller and light board remote receiver can be used at the same time.
②When light board remote receiver is used, please use remote controller at the same
time.
4.7.4 Communication connection of central controlling units
Note:The centralized controller can be installed when it is necessary.
Port connection G1 and G2 on the wiring board XT2 of master unit among each multi VRF
system (see below)
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Fig. 4.7.8
46
GMV DC Inverter VRF