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Operation
Installer and user reference guide
30
RXYTQ
VRV IV+ heat pump for high ambient temperatures
4P561157-1B – 2021.11
7.6 Setting the master user interface
7.6.1 About setting 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.
7.6.2 To designate the master user interface (VRV DX and Hydrobox)
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).
7.7 About control systems
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
Description
Group control system
1 user interface controls up to 16 indoor units.
All indoor units are equally set.
2 user interface control system 2 user interfaces control 1 indoor unit (in case of
group control system, 1 group of indoor units).
The unit is individually operated.
NOTICE
Contact your dealer in case of changing the combination or setting of group control
and 2 user interface control systems.
