Daikin FCAG71AVEB - System Operation; Operation Range; Operating the System; Cooling, Heating, and Fan Modes

15 Operation
Installer and user reference guide
25
FCAG35~140AVEB
Split system air conditioners
4P473927-1 – 2017.03
15 Operation
15.1 Operation range
Use the system in the following temperature and humidity ranges for
safe and effective operation.
For combination with R410A outdoor unit, refer to the following table:
Outdoor units Cooling Heating
RR71~125 Outdoor
temperature
–15~46°CDB —
Indoor
temperature
18~37°CDB
12~28°CWB
—
RQ71~125 Outdoor
temperature
–5~46°CDB –9~21°CDB
–10~15°CWB
Indoor
temperature
18~37°CDB
12~28°CWB
10~27°CDB
RXS35~60 Outdoor
temperature
–10~46°CDB –15~24°CDB
–16~18°CWB
Indoor
temperature
18~32°CDB 10~30°CDB
3MXS40~68
4MXS68~80
5MXS90
Outdoor
temperature
–10~46°CDB –15~24°CDB
–16~18°CWB
Indoor
temperature
18~32°CDB 10~30°CDB
RZQG71~140 Outdoor
temperature
–15~50°CDB –19~21°CDB
–20~15.5°CWB
Indoor
temperature
18~37°CDB
12~28°CWB
10~27°CDB
RZQSG71~140 Outdoor
temperature
–15~46°CDB –14~21°CDB
–15~15.5°CWB
Indoor
temperature
20~37°CDB
14~28°CWB
10~27°CDB
RZQ200~250 Outdoor
temperature
–5~46°CDB –14~21°CDB
–15~15°CWB
Indoor
temperature
20~37°CDB
14~28°CWB
10~27°CDB
AZQS71~125 Outdoor
temperature
–15~46°CDB –14~21°CDB
–15~15.5°CWB
Indoor
temperature
20~37°CDB
14~28°CWB
10~27°CDB
For combination with R32 outdoor unit, refer to the following table:
Outdoor units Cooling Heating
RXM35~60 Outdoor
temperature
–10~46°CDB –15~24°CDB
–16~18°CWB
Indoor
temperature
18~32°CDB 10~30°CDB
3MXM40~68
4MXM68~80
5MXM90
Outdoor
temperature
–10~46°CDB –15~24°CDB
–16~18°CWB
Indoor
temperature
18~32°CDB 10~30°CDB
RZAG71~140 Outdoor
temperature
–20~52°CDB –19.5~21°CDB
–20~15.5°CWB
Indoor
temperature
18~37°CDB
12~28°CWB
10~27°CDB
Outdoor units Cooling Heating
RZASG71~140 Outdoor
temperature
–15~46°CDB –14~21°CDB
–15~15.5°CWB
Indoor
temperature
20~37°CDB
14~28°CWB
10~27°CDB
AZAS71~140 Outdoor
temperature
–15~46°CDB –14~21°CDB
–15~15.5°CWB
Indoor
temperature
20~37°CDB
14~28°CWB
10~27°CDB
Indoor humidity ≤80%
(a)
(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.
15.2 Operating the system
15.2.1 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.
15.2.2 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.
15.2.3 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 deliver enough heat to the indoor
units.
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.
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 . It may take some
time before the fan starts. This is not a malfunction.