Gree CE52-24/F(C) Owner's Manual page 14

NOTE:
If the centralized controller is to be connected with U-match units，communication
line(one end is two-core terminal, the other end is the bare wire. Code:
420400060252)need to be purchased separately. The quantity of
communication line is the quantity of U-match units plus 1.
(3) If the centralized controller is to be connected with U-match units which have
6-core neilsbed, connect according to fig.3.8. The controller must connect with
terminal gateway. Connect the centralized controller's A3 and B3 ports to A
and B port on the Modbus Gateway. A matching resistance needs to be added
with the communication cords at the A3 and B3 ports. The modbus gateway
connecte to 6-core neilsbed of U-match mainboard, need to be purchased
separately. Each U-match unit need one Modbus gateway.
(4) The indoor unit address must be set within the range from 1 to 36, and
different from each other. Identicle addresses will lead to communication
failure. Below is the address setting method:
1) Under OFF status, press "Function" and "Mode" on the wired controller
simultaneously for 5S to enter the address setting. Then the display panel
will show its own address number on the temperature display zone. Adjust
the number by pressing the "Up" and "Down" buttons.
2) When setting is over, press "OK/Cancel" or "Swing/Enter" to save the
setting and exit. Under the setting status, if no action is taken within 20S,
system will exit from the setting and return to the display mode of OFF
status. Setting can't be saved in this case.
(5) Communication method of U-match units must be long-distance monitoring
mode, else can not communicate with centralized controller, set the way as
follows.
1) Under OFF status, press "Function" and "Timer" on the wired controller
simultaneously for 5S to enter the setting of long-distance monitor. Press
"Mode" button to adjust to "10" in tempeture display zone, then choose "01"
enter into long-distance monitoring mode by pressing the "Up" and "Down"
buttons.
2) When setting is over, press "OK/Cancel" or "Swing/Enter" to save the
setting and exit. Under the setting status, if no action is taken within 20
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Centralized Controller