6 Operation
Installation and operation manual
9
FXFQ20~125BVEB
VRV system air conditioner
4P540926-1F – 2023.06
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.
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.
INFORMATION
Depending on system layout and organisation, Auto airflow
direction may not be available.
INFORMATION
For setting procedure of the airflow direction, see the
reference guide or the manual of the used user interface.
Automatic airflow control
Cooling Heating
▪ When the room temperature is
lower than the controller's
setpoint for cooling operation
(including auto operation).
▪ When the indoor units run in
Continuous operation, and the
airflow direction is downward.
▪ When starting operation.
▪ When the room temperature is
higher than the controller's
setpoint for heating operation
(including auto operation).
▪ At defrost operation.
▪ When the indoor units run continuously for a long time and the
airflow direction is Horizontal.
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
Avoid operating in the horizontal direction. It may cause
dew or dust to settle on the ceiling or flap.
6.2.4 Active circulation airflow
Use active circulation airflow to heat or cool the room more quickly.
INFORMATION
For setting procedure of the active circulation airflow, see
the reference guide or the manual of the used user
interface.
6.3 To operate the system
INFORMATION
For setting of the operation mode, airflow direction, active
circulation airflow or other settings, see the reference guide
or operation manual of the user interface.
To Next Page
Loading...
