Daikin VRV IV+, Installer And User Reference Manual

Page: 146 / 168

16 | Operation
Installer and user reference guide
146
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1A – 2019.10
16.5 Setting the master user interface
16.5.1 About setting the master user interface
e
b
f
d
b
d
c
a
e
f
a VRV heat pump outdoor unit
b VRV direct expansion (DX) indoor unit
c BP box (required to connect Residential Air (RA) or Sky Air (SA) Direct Expansion
(DX) indoor units)
d Residential Air (RA) Direct Expansion (DX) indoor units)
e User interface (dedicated depending on indoor unit type)
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 (change-over under centralised
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 Description
VRV DX indoor unit combined
with Hydrobox unit 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).
VRV DX indoor units combined
with RA DX indoor units 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.
16.5.2 To designate the master user interface (VRV DX and Hydrobox)
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 (change-over under centralised control) of
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 (change-over under
centralised control) vanishes. The displays of other user interfaces show
(change-over under centralised control).