Gree GMV-72WM/B-U Owner's Manual page 40

GMV DC Inverter VRF
When two wired controllers control multiple IDUs, the wired controller can be connected to any
one IDU, provided that the connected IDU is of the same series. Meanwhile, one and only one of the
wired controllers must be set as a slave controller. At most 16 IDUs can be controlled by wired
controllers and the connected IDUs shall be within a same IDU network.
No matter when unit is turned on or off, slave controller can be set.
How to set a slave controller: hold "function" button on the designated controller for 5s, and
temperature zone displays C00. Continue holding "function" button for 5s and setting screen of
controller parameter will come out. Default temperature zone displays P00.
Press button or
setup of parameter values. Then the parameter value will blink. Press
select code 02. And then press "confirm/cancel" to finish setting.
Press "confirm/cancel" to return to the previous display until you exit from the setup of parameter
values.
Below are user's parameter settings:
Parameter Parameter
code name
Set up address
P13 for wired
controller
Fig.4.8.6 Two wired controllers control multiple IDUs
button to select parameter code P13. Press "mode" button to switch to
Parameter scope
01: master wired
controller
02: slave wired
controller
Default
value
When 2 wired controllers control one or more
IDUs, they shall have different addresses.
01
Slave wired controller (02) can't set up units'
parameters except its own address.
36
button or button to
Remark