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Operation
Installer and user reference guide
31
R R8T7V1B
VRV IV heat pump for indoor installation
4P499898-1B – 2021.12
WARNING
NEVER touch the air outlet or the horizontal blades while the swing flap is in
operation. Fingers may become caught or the unit may break down.
NOTICE
▪
The movable limit of the flap is changeable. Contact your dealer for details. (only
for double-flow, multi-flow, corner, ceiling-suspended and wall-mounted).
▪
Avoid operating in the horizontal direction
. It may cause dew or dust to
settle on the ceiling or flap.
7.6 Setting the master user interface
7.6.1 About setting the master user interface
d
d
c
c
a
b
VRV DX
VRV DX
VRV DX
EKEXV
AHU
d
d
1
2
1
In case of VRV DX indoor units
2
In case of VRV DX indoor units combined with an air handling unit
a
Heat exchanger unit
b
Compressor unit
c
Refrigerant piping
d
User interface (dedicated depending on indoor unit type)
VRV DX
VRV direct expansion (DX) indoor unit
EKEXV
Expansion valve kit
AHU
Air handling unit
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.
7.6.2 To designate the master user interface (VRV DX)
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 compressor 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).
