Fujitsu AST9 Air Conditioner User Manual


 
8
* 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 thermostat is set
higher than the actual room temperature
(in Cooling mode, the fan alone will oper-
ate).
*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 tem-
perature in the vicinity of the air condi-
tioner rises above the set thermostat
temperature; when the temperature
drops, fan operation stops.
If the air emitted feels too cool, raise
the thermostat setting.
AUTO: COOLING MODEL
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 setting 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 to 30 °C Cooling 26 °C
25 to 27 °C Dry 24 °C
23 to 25 °C Dry 22 °C
Below 23 °C Dry 20 °C
The operating mode and standard thermostat settings are selected automatically
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 operating from the same
mode as before.
*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 set-
ting. 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 De-
frosting operation, the OPERATION indicator 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 detecting room humidity.
The fan speed cannot be changed manually when Dry mode has been selected.
Fan:
Use to circulate the air throughout your room.