To Designate The Master User Interface (Vrv Dx And Hydrobox); About Control Systems - Daikin VRV IV+ RYYQ14U7Y1B Series Installer And User Manual

8 | Operation

8.5.2 To designate the master user interface (VRV DX and Hydrobox)

8.6 About control systems

Installer and user reference guide
32
f User interface (wireless, dedicated depending on indoor unit type)
When the system is installed as shown in the figure above, it is necessary to
designate one of the user interfaces as the master user interface.
The displays of slave user interfaces show
control) and slave user interfaces automatically follow the operation mode
directed by the master user interface.
Only the master user interface can select heating or cooling mode.
Indoor unit master allocation is determined as follows in special cases:
Case
VRV DX indoor unit combined
with Hydrobox unit
VRV DX indoor units combined
with RA DX indoor units
In case only VRV DX indoor units (and Hydrobox units) are connected to the VRV IV
system:
1 Press the operation mode selector button of the current master user interface
for 4 seconds. In case this procedure was not yet performed, the procedure
can be executed on the first user interface operated.
Result: The display showing
all slave user interfaces connected to the same outdoor unit flashes.
2 Press the operation mode selector button of the controller that you wish to
designate as the master user interface.
Result: Designation is completed. This user interface is designated as the
master user interface and the display showing
centralised control) vanishes. The displays of other user interfaces show
(change-over under centralised control).
This system provides two other control systems beside individual control system
(one user interface controls one indoor unit). Confirm the following if your unit is
of the following control system type:
Type
Group control system
2 user interface control system 2 user interfaces control 1 indoor unit (in case of
(change-over under centralised
Description
The operation mode is always forced by the
master user interface of the VRV DX indoor unit.
The Hydrobox unit cannot select the operation
mode (cooling/heating).
The operation mode is by default selected by
the master user interface of the RA DX indoor
unit. Contact your installer if you wish to know
which indoor unit type received the master
allocation.
(change-over under centralised control) of
Description
1 user interface controls up to 16 indoor units.
All indoor units are equally set.
group control system, 1 group of indoor units).
The unit is individually operated.
(change-over under
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1B – 2020.10