Fujitsu AST9UMBD User Manual

8
About Mode Operation
*Heating: ● Use to warm your room.
● When Heating mode is selected, the air conditioner will operate at very
low fan speed for about 3 to 5 minutes, after which it will switch to the
selected fan setting. This period of time is provided to allow the indoor
unit to warm up before beginning full operation.
● When the room temperature is very low, frost may form on the outside
unit, and its performance may be reduced. In order to remove such
frost, the unit will automatically enter the defrost cycle from time to
time. During Automatic Defrosting operation, the OPERATION indica-
tor lamp (red) will flash, and the heat operation will be interrupted.
Cooling: ● Use to cool your room.
Dry: ● Use for gently cooling while dehumidifying your room.
● You cannot heat the room during Dry mode.
● During Dry mode, the unit will operate at low speed; in order to adjust
room humidity, the indoor unit’s fan may stop from time to time. Also,
the fan may operate at very low speed when adjusting room humidity.
● The fan speed cannot be changed manually when Dry mode has been
selected.
Fan: ● Use to circulate the air throughout your room.
* During Heating mode:
Set the thermostat to a temperature set-
ting that is higher than the current room
temperature. The Heating mode will not
operate if the thermostat is set lower
than the actual room temperature.
During Cooling/Dry mode:
Set the thermostat to a temperature set-
ting that is lower than the current room
temperature. The Cooling and Dry
modes will not operate if the thermo-
stat is set higher than the actual room
temperature (in Cooling mode, the fan
alone will operate).
* During Fan mode:
HEAT & COOL MODEL (REVERSE
CYCLE)
You can not use the unit to heat and
cool your room.
During Fan mode: COOLING MODEL
● Fan operation begins when room
temperature in the vicinity of the air
conditioner rises above the set ther-
mostat temperature; when the tem-
perature drops, fan operation stops.
● If the air emitted feels too cool, raise
the thermostat setting.
About AUTOMATIC Operation (COOLING MODEL)
AUTO: ● Depending on the room temperature at the time operation begins, the
operating mode will be switched automatically as shown in the
accompanying table.
Also, depending on the operating mode, the room temperature set-
ting will cause the “standard” temperature to be set as shown.
Actual Room Operating Mode Thermostat Setting
Temperature (standard setting)
30 °C or above → Cooling → 27 °C
27 °C to 30 °C → Cooling → 26 °C
25 °C to 27 °C → Dry → 24 °C
23 °C to 25 °C → Dry → 22 °C
Below 23 °C → Dry → 20 °C
The operating mode and standard thermostat settings are selected auto-
matically when operation begins.
● When automatic operation is initiated, the fan will run at very low
speed for about one minute while the unit detects and selects the proper
operating mode.
● Once the operating mode has been set, the mode will not change even
if the room temperature changes.
● If the START/STOP button is pressed to recommence operation within
two hours after stopping automatic operation, the unit will begin op-
erating from the same mode as before.
Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).
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Fujitsu AST9UMBD Specifications

General

Brand	Fujitsu
Model	AST9UMBD
Category	Air Conditioner
Language	English