7
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Operation
Installer and user reference guide
31
RYYQ+RYMQ+RXYQ
VRV IV+ heat pump
4P546228-1C – 2021.11
Cooling
Heating
▪
When operating continuously at horizontal air flow direction.
▪
When continuous operation with downward air flow is performed at the time of
cooling with a ceiling-suspended or a wall-mounted unit, the micro computer
may control the flow direction, and then the user interface indication will also
change.
The air flow direction can be adjusted in one of the following ways:
▪
The air flow flap itself adjusts its position.
▪
The air flow direction can be fixed by the user.
▪
Automatic
and desired position .
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
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:
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