6 Operation
Installation and operation manual
8
RXYTQ8~16U7YF
VRV IV+ heat pump for high ambient temperatures
4P546223-1B – 2020.10
Cooling operation
1
1
Heating operation
1
1
Fan only operation
1
2
Press the ON/OFF button on the user interface.
Result:
The operation lamp lights up and the system starts
operating.
To stop
3
Press the ON/OFF button on the user interface once again.
Result:
The operation lamp goes out and the system stops
operating.
NOTICE
Do not turn off power immediately after the unit stops, but
wait for at least 5 minutes.
To adjust
For programming temperature, fan speed and air flow direction refer
to the operation manual of the user interface.
6.3
Using the dry program
6.3.1
About the dry program
▪ The function of this program is to decrease the humidity in your
room with minimal temperature decrease (minimal room cooling).
▪ The micro computer automatically determines temperature and
fan speed (cannot be set by the user interface).
▪ The system does not go into operation if the room temperature is
low (<20°C).
6.3.2
To use the dry program (WITHOUT cool/
heat changeover remote control switch)
To start
1
Press the operation mode selector button on the user interface
several times and select
(program dry operation).
2
Press the ON/OFF button of the user interface.
Result:
The operation lamp lights up and the system starts
operating.
3
Press the air flow direction adjust button (only for double-flow,
multi-flow, corner, ceiling-suspended and wall-mounted). Refer
to
"6.4 Adjusting the air flow direction"
8] for details.
To stop
4
Press the ON/OFF button on the user interface once again.
Result:
The operation lamp goes out and the system stops
operating.
NOTICE
Do not turn off power immediately after the unit stops, but
wait for at least 5 minutes.
6.3.3
To use the dry program (WITH cool/heat
changeover remote control switch)
To start
1
Select cooling operation mode with the cool/heat changeover
remote control switch.
1
1
2
Press the operation mode selector button on the user interface
several times and select
(program dry operation).
3
Press the ON/OFF button of the user interface.
Result:
The operation lamp lights up and the system starts
operating.
4
Press the air flow direction adjust button (only for double-flow,
multi-flow, corner, ceiling-suspended and wall-mounted). Refer
to
"6.4 Adjusting the air flow direction"
8] for details.
To stop
5
Press the ON/OFF button on the user interface once again.
Result:
The operation lamp goes out and the system stops
operating.
NOTICE
Do not turn off power immediately after the unit stops, but
wait for at least 5 minutes.
6.4
Adjusting the air flow direction
Refer to the operation manual of the user interface.
6.4.1
About the air flow flap
Double flow+multi-flow units
Corner units
Ceiling suspended units
Wall-mounted units
For the following conditions, a micro computer controls the air flow
direction which may be different from the display.
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.
