Gree GMV-V72W/A-F Owner's Manual page 41

Ultra Heat GMV Multi VRF
When two wired controllers control multiple IDUs, the wired controllers 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 the two 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
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
4.8.3 Communication connection between duct type IDU and light board receiver
When the duct type IDU needs to be connected to light board remote receiver, it can be connected
via Dsp1 and Dsp2 on the IDU main board.
IDU type
Duct type IDU
Fig.46 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
Connection wire
Between boards (17-core)
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.
Main board interface of corresponding IDU
Dsp1 (direct to 8-core interface)
Dsp2 (direct to 9-core interface)
37
button or button to select
Remark