5 User interface
Installation and operation manual
9
FXFA20~125A2VEB
VRV system air conditioner
3P599604-1C – 2020.10
5
User interface
CAUTION
▪ NEVER touch the internal parts of the controller.
▪ Do NOT remove the front panel. Some parts inside are
dangerous to touch and appliance problems may
happen. For checking and adjusting the internal parts,
contact your dealer.
NOTICE
Do NOT wipe the controller operation panel with benzine,
thinner, chemical dust cloth, etc. The panel may get
discoloured or the coating peeled off. If it is heavily dirty,
soak a cloth in water-diluted neutral detergent, squeeze it
well and wipe the panel clean. Wipe it with another dry
cloth.
NOTICE
NEVER press the button of the user interface with a hard,
pointed object. The user interface may be damaged.
NOTICE
NEVER pull or twist the electric wire of the user interface. It
may cause the unit to malfunction.
This operation manual offers a non-exhaustive overview of the main
functions of the system.
For more information about the user interface, see the operation
manual of the installed user interface.
6
Operation
6.1
Operation range
INFORMATION
For the operation limits see the technical data of the
connected outdoor unit.
6.2
About operation modes
INFORMATION
Depending on the installed system, some operation modes
will not be available.
▪ The air flow rate may adjust itself depending on the room
temperature or the fan may stop immediately. This is not a
malfunction.
▪ If the main power supply is turned off during operation, operation
will restart automatically after the power turns back on again.
▪
Setpoint.
Target temperature for the Cooling, Heating, and Auto
operation modes.
▪
Setback.
A function that keeps the room temperature in a specific
range when the system is turned off (by the user, the schedule
function, or the OFF timer).
6.2.1
Basic operation modes
The indoor unit can operate in various operation modes.
Icon
Operation mode
Cooling.
In this mode, cooling will be activated as
required by the setpoint, or by Setback operation.
Heating.
In this mode, heating will be activated as
required by the setpoint, or by Setback operation.
Icon
Operation mode
Fan only.
In this mode, air circulates without heating
or cooling.
Dry.
In this mode, the air humidity will be lowered with
a minimal temperature decrease.
The temperature and fan speed are controlled
automatically and cannot be controlled by the
controller.
Dry operation will not function if the room temperature
is too low.
Auto.
In Auto mode, the indoor unit automatically
switches between heating and cooling mode, as
required by the setpoint.
6.2.2
Special heating operation modes
Operation
Description
Defrost
To prevent a loss of heating
capacity due to frost
accumulation in the outdoor unit,
the system will automatically
switch to defrost operation.
During defrost operation, the
indoor unit fan will stop
operation, and the following icon
will appear on the home screen:
The system will resume normal
operation after approximately 6
to 8 minutes.
Hot start
During hot start, the indoor unit
fan will stop operation, and the
following icon will appear on the
home screen:
6.2.3
Adjusting the airflow direction
The following airflow directions can be set:
Direction
Screen
Fixed position
. The indoor unit
blows air in 1 of 5 fixed positions.
Swing
. The indoor unit alternates
between the 5 positions.
Auto.
The indoor unit adjusts its
airflow direction according to
movement sensed by a
movement sensor.
