Operating The System; About Operating The System; About Cooling, Heating, Fan Only, And Automatic Operation; About The Heating Operation - Daikin FFA25A2VEB Manual De Instalación Y Funcionamiento

Outdoor units
2MXM50
3MXM40~68
4MXM68~80
5MXM90
RZAG35~60
RZAG71~140
RZASG71~140
Indoor humidity
Symbol Explanation
Outdoor temperature
Indoor temperature
(a) To avoid condensation and water dripping out of the unit. If
the temperature or the humidity is beyond these conditions,
safety devices may be put in action and the air conditioner
may not operate.
10.2

Operating the system

10.2.1

About operating the system

▪ To protect the unit, turn on the main power switch 6 hours before
operation.
▪ If the main power supply is turned off during operation, operation
will restart automatically after the power turns back on again.
10.2.2 About cooling, heating, fan only, and
automatic operation
▪ The air flow rate may adjust itself depending on the room
temperature or the fan may stop immediately. This is not a
malfunction.
10.2.3

About the heating operation

It may take longer to reach the set temperature for general heating
operation than for cooling operation.
The following operation is performed in order to prevent the heating
capacity from dropping or cold air from blowing.
Defrost operation
In heating operation, freezing of the outdoor unit's air cooled coil
increases over time, restricting the energy transfer to the outdoor
unit's coil. Heating capability decreases and the system needs to go
into defrost operation to be able to remove frost from the outdoor
unit's coil. During defrost operation the heating capacity on the
indoor unit side will temporarily drop until defrosting is completed.
After defrosting, the unit will regain its full heating capacity.
The indoor unit will stop fan operation, the refrigerant cycle will
reverse and energy from inside the building will be used to defrost
the outdoor unit coil.
FFA25~60A2VEB(9)
Split system air conditioners
4P456960-1B – 2018.08
Cooling Heating
–10~46°C DB –15~24°C DB
–16~18°C WB
18~32°C DB 10~30°C DB
–20~52°C DB –20~24°C DB
–21~18°C WB
18~32°C DB 10~30°C DB
–20~52°C DB –19.5~21°C DB
–20~15.5°C WB
18~37°C DB 10~27°C DB
12~28°C WB
–15~46°C DB –14~21°C DB
–15~15.5°C WB
20~37°C DB 10~27°C DB
14~28°C WB
(a)
≤80%
The indoor unit will indicate defrost operation on the display
Hot start
In order to prevent cold air from blowing out of an indoor unit at the
start of heating operation, the indoor fan is automatically stopped.
The display of the user interface shows
time before the fan starts. This is not a malfunction.
10.2.4

To operate the system

1 Press the operation mode selector button on the user interface
several times and select the operation mode of your choice.
Cooling operation
Heating operation
Fan only operation
2 Press the ON/OFF button on the user interface.
Result: The operation lamp lights up and the system starts
operating.
10.3

Using the dry program

10.3.1

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).
10.3.2

To use the dry program

To start
1 Press the operation mode selector button on the user interface
several times and select
2 Press the ON/OFF button of 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.
10.4

Adjusting the air flow direction

Refer to the operation manual of the user interface.
10.4.1

About the air flow flap

Double flow+multi-flow units
For the following conditions, a micro computer controls the air flow
direction which may be different from the display.
10 Operation
. It may take some
(program dry operation).
Installation and operation manual
.
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