Gree XK86 Owner's Manual page 21

Wired Controller (XK86 and XE76-33/H)
same time, the controlled units should have the same setting.
(5) Network connection of wired controller and indoor units must be according
to one of the four wiring methods as shown in fig 5.6-5.9. As for the
connection method shown in fig 5.7 and 5.9, there should be only one
master wired controller (address is 01) and one slave wired controller
(address 02). The quantity of wired controller can't exceed two.
NOTE: Series of indoor units include:
① Common Multi VRF Units;
② Fresh Air Units;
③ Double-heat Sources Units;
④ Combined Units; Except for fresh air units, double-heat sources units and
combined units, the rest of indoor units belong to common multi VRF units.
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