Daikin BRC1H61W Installation Handbook page 15

Releasing the changeover master (VRV only)
To change the authority to choose cooling/heating, you must first specify the remote
controller with the authority, then release the authority.
Depending on the system, setting may not be available.
Prerequisite: You are in the installer menu.
You are operating the controller of the indoor unit that you want to release
from being the changeover master.
Home screen
30
˚C
28
Information screen
12:34
Installer menu screen
14
Press and hold button for 5 seconds or longer.
The information screen is displayed.
Press
 
10 seconds.
The installer menu screen is displayed.
Navigate to the Rel Master Control menu "
(in that order) and hold them down for
".