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Fujitsu Inverter Halcyon 9374379392-04 Operating Manual page 16

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OPERATING TIPS
Mode operation: AUTO
COOLING MODEL
● When the room temperature is 4 °F higher than the set
temperature, the mode will switch between Cooling and
Drying.
HEAT & COOL MODEL (Reverse Cycle)
Auto changeover function
● When AUTO CHANGEOVER is selected, the air condi-
tioner selects the appropriate operation mode (Cooling
or Heating) according to your room's present tempera-
ture.
● When AUTO CHANGEOVER is fi rst selected, the fan will
operate at a very low speed for about a few minutes while
the unit determines the current conditions of the room and
selects the proper operation mode.
If the difference between thermostat setting and actual
room temperature is more than +4 °F
→ Cooling operation
If the difference between thermostat setting and actual
room temperature is within ±4 °F
→ Determined by outdoor temperature
If the difference between thermostat setting and actual
room temperature is more than –4 °F
→ Heating operation
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. Dur-
ing Automatic Defrosting operation, and the heat operation will be inter-
rupted.
● After the start of heating operation, it takes sometime before the room gets
warmer.
Cooling: ● Use to cool your room.
● Use for gently cooling while dehumidifying your room.
Dry:
● 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 se-
lected.
● Use to circulate the air throughout your room.
Fan:
AUTO Restart
In Event of Power Interruption
● Should the power supply to the air conditioner be inter-
rupted by a power failure, the air conditioner will restart
automatically in the previously selected mode once the
power is restored.
En-15
● During the Drying mode operation, the FAN setting should
be switched to LOW for a gently cooling effect during which
the fan may temporarily stop rotating.
● When the room temperature is near the thermostat setting,
the air conditioner will begin monitor operation. In the monitor
operation mode, the fan will operate at a very low speed. If
the room temperature subsequently changes, the air condi-
tioner will once again select the appropriate operation (Heating
or Cooling) to adjust the temperature to the value set in the
thermostat.
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
setting 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 tem-
perature (in Cooling mode, the fan alone
will operate).
During Fan mode:
You can not use the unit to heat and cool
your room.
● Use of other electrical appliances (electric shaver, etc.) or
nearby use of a wireless radio transmitter may cause the
air conditioner to malfunction. In this event, temporarily
disconnect the power supply, reconnect it, and then use
the remote controller to resume operation.

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