Fujitsu ARU30RGLX - Operating Tips; Mode Operation

En-3
Mode operation
Auto
Cooling model:
• When AUTO (auto changeover) operation rst selected,
the fan will operate at very low speed for about a few
minutes, during which time the indoor unit detects the
room conditions and selects the proper mode.
Room temperature is higher than the dened temperature
in temperature setting → Cooling mode
Room temperature is close to or lower than the dened
temperature in temperature setting → Monitor operation
Cooling mode
Monitor operation
Dened tem-
perature in
temperature
setting
• When the indoor unit has adjusted your room’s tempera-
ture to near the temperature setting, it will begin monitor
operation. In the monitor operation mode, the fan will
operate at low speed. If the room temperature subse-
quently changes, the indoor unit will once again select
the appropriate operation (cooling) to adjust the tempera-
ture to the value set in the temperature setting.
• If the mode automatically selected by the unit is not what
you wish, select one of the mode operation (Cooling,
Dry, Fan).
Heating and Cooling model (Reverse cycle):
• When AUTO (auto changeover) is selected, the air condi-
tioner selects the appropriate operation mode (Cooling or
Heating) according to your room’s present temperature.
• When Auto mode is rst selected, the fan will operate at
low speed for about a few minutes, during which time the
indoor unit detects the room conditions and selects the
proper operation mode.
Room temperature is higher than the dened tempera-
ture in temperature setting → Cooling mode
Room temperature is close to the dened temperature in
temperature setting → Determined by outdoor tempera-
ture
Room temperature is lower than the dened temperature
in temperature setting → Heating mode
Dened temper-
ature in tempera-
ture setting
Determined by
outdoor temperature
Cooling mode
Heating mode
• When the air conditioner has adjusted your room’s
temperature to near the thermostat setting, it will begin
monitor operation. In the monitor operation mode, the
fan will operate at low speed. If the room temperature
subsequently changes, the air conditioner will once again
select the appropriate operation (Heating, Cooling) to ad-
just the temperature to the value set in the thermostat.
If the mode automatically selected by the unit is not what
you wish, select one of the mode operation (Heating,
Cooling, Dry, Fan).
OPERATING TIPS
Instructions relating to heating (*) are applicable only to
Heating and Cooling model (Reverse Cycle).
Heating performance*
• This air conditioner operates on the heat-pump principle,
absorbing heat from outdoor air and transferring that heat
indoors. As a result, the operating performance is reduced
as outdoor air temperature drops. Also, please consult with
your installation technician to ensure the unit is correctly
sized for the room space required.
• Heat-pump air conditioners heat your entire room by recir-
culating air throughout the room, with the result that some
time may be required after rst starting the air conditioner
until the room is heated.
When indoor and outdoor temperatures are high*
When both indoor and outdoor temperatures are high during use
of the Heating mode, the outdoor unit’s fan may stop at times.
Microcomputer-controlled automatic defrosting*
• When using the Heating mode under conditions of low
outdoor temperature and high humidity, frost may form on
the outdoor unit, reducing the operating performance.
In order to prevent this reduced performance, this product
is equipped with a microcomputer-controlled automatic
defrosting function. During the defrost cycle, the indoor fan
will shut down, and the defrost mode will be indicated. It
will take maximum of 15 minutes before the air conditioner
starts up again.
• After Heating operation stops, if frost forms on the outdoor
unit, the unit will start Automatic defrosting operation.
At this time, the outdoor unit will automatically stop after
operating for a few minutes.
Hot start*
The indoor unit prevents cold drafts when Heating operation
begins.
The indoor unit fan will not operate or it will operate at a very low
speed until the heat exchanger reaches the set temperature.
Low ambient cooling
When the outdoor temperature drops, the outdoor unit’s fans
may switch to low speed, or one of the fans may stop inter-
mittently.
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