14 Operation
Installer and user reference guide
24
FFA25~60A2VEB(9)
Split system air conditioners
4P550955-4 – 2018.08
Outdoor units
Cooling
Heating
RXS25~60
–10~46°C DB
–15~24°C DB
–16~18°C WB
18~32°C DB
10~30°C DB
2MXS50
10~46°C DB
–15~24°C DB
–16~18°C WB
18~32°C DB
10~30°C DB
3MXS40~68
4MXS68~80
5MXS90
–10~46°C DB
–15~24°C DB
–16~18°C WB
18~32°C DB
10~30°C DB
RZQG71~140
–15~50°C DB
–19~21°C DB
–20~15.5°C WB
18~37°C DB
12~28°C WB
10~27°C DB
RZQSG71~140
–15~46°C DB
–14~21°C DB
–15~15.5°C WB
20~37°C DB
14~28°C WB
10~27°C DB
RZQ200~250
–5~46°C DB
–14~21°C DB
–15~15°C WB
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
RXM25~60
–10~46°C DB
–15~24°C DB
–16~18°C WB
18~32°C DB
10~30°C DB
2MXM50
3MXM40~68
4MXM68~80
5MXM90
–10~46°C DB
–15~24°C DB
–16~18°C WB
18~32°C DB
10~30°C DB
RZAG35~60
–20~52°C DB
–20~24°C DB
–21~18°C WB
18~32°C DB
10~30°C DB
RZAG71~140
–20~52°C DB
–19.5~21°C DB
–20~15.5°C WB
18~37°C DB
12~28°C WB
10~27°C DB
RZASG71~140
–15~46°C DB
–14~21°C DB
–15~15.5°C WB
20~37°C DB
14~28°C WB
10~27°C DB
Indoor humidity
≤80%
(a)
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.
14.2
Operating the system
14.2.1
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.
14.2.2
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.
14.2.3
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.
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.
INFORMATION
▪ The heating capacity drops when the outside
temperature falls. If this happens, use another heating
device together with the unit. (When using together with
appliances that produce open fire, ventilate the room
constantly). Do not place appliances that produce open
fire in places exposed to the air flow from the unit or
under the unit.
▪ It takes some time to heat up the room from the time
the unit is started since the unit uses a hot-air
circulating system to heat the entire room.
▪ If the hot air rises to the ceiling, leaving the area above
the floor cold, we recommend that you use the
circulator (the indoor fan for circulating air). Contact
your dealer for details.
14.2.4
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
Summary of Contents for FFA25A2VEB9
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