Gree CE52-24/F(C) Owner's Manual page 15

Centralized Controller
seconds, system will exit from the setting and return to the display mode of
OFF status. Setting can't be saved in this case.
NOTE:
Address setting and long-distance monitor setting of unitary units can only be
achieved through wired controllers, the setting mode of different remote
controllers may be different. Please refer to the relevant technical service
manual for details.
(6) If the centralized controller is to be connected with PAC units, connect
according to fig.3.9. Each PAC unit is connected with can interface of gateway
through COM interface, and gateway 485 interface is connected with A3 and
B3 interface of centralized controller.
(7) Gateway address setting and function code setting:
The gateway address should be set by S1 and S2 together, and the address
setting range is 1 ~ 36. The gateway function code setting needs to set the first
bit of S3 to on terminal, otherwise the centralized controller will not be able to
communicate normally.
NOTE:
A gateway can only be connected to one PAC unit. It is not possible to connect
a gateway to multiple units at the same time.
Method 2: The central controller connects to the free match by the method as below:
Fig.3.10 Centralized Controller Connected with Wired Controller
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