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Installation and operation manual
57
RYYQ+RYMQ+RXYQ8~20T7Y1B
VRV IV System Air Conditioner
4P329765-1 – 2012.09
Stopping the system
5
Press the ON/OFF button of the user interface once again. The
operation lamp goes off and the system stops operating.
6.3.
Adjusting the air flow direction
Refer to the operation manual of the user interface.
6.3.1.
Movement of the air flow flap
For the following conditions, a micro computer controls the air flow
direction which may be different from the display.
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
.
6.4.
Setting the master user interface
1
VRV heat pump outdoor unit
2
VRV direct expansion (DX) indoor unit
3
VRV LT Hydrobox
4
BP box (required to connect Residential Air (RA) or Sky Air
(SA) Direct Expansion (DX) indoor units)
5
Residential Air (RA) Direct Expansion (DX) indoor units)
6
User interface (dedicated depending on indoor unit type)
7
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 centralized 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:
In case of 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).
In case of 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.
6.4.1.
How to designate the master user interface
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.
The display showing
(change-over under centralized
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. Then
designation is completed. This user interface is designated as
the master user interface and the display showing
(change-over under centralized control) vanishes. The displays
of other user interfaces show
(change-over under
centralized control).
In case VRV DX indoor units and RA DX indoor units are
connected (or only RA indoor units):
Depending on field setting which was executed on the outdoor unit,
the right for master selection lies with the VRV DX indoor unit or the
RA DX indoor unit (see above).
1
In case the VRV DX indoor unit is assigned as master selector,
the same procedure as above can be followed.
2
In case the RA DX indoor unit is assigned as master selector,
following procedure can be followed.
NOTICE
Do not turn off power immediately after the unit stops, but
wait for at least 5 minutes.
Double flow+multi-flow units
Corner units
Ceiling suspended units
Wall-mounted units
COOLING
HEATING
• When the room temperature is
lower than the set temperature.
• When starting operation.
• When the room temperature is
higher than the set temperature.
• At defrost operation.
• 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.
NOTICE
The movable limit of the flap is changeable. Contact
your dealer for details. (only for double-flow, multiflow,
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.
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4
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