Fujitsu 9374379392-04 User Manual

En-15

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

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.

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.

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 se-

lected.

Fan: 

●  Use to circulate the air throughout your room.

● When the room temperature is 4 °F higher than the set 

temperature, the mode will switch between Cooling and 
Drying. 

● 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.

● 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.

●  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.

9374379392-04_OM.indb   15

9374379392-04_OM.indb   15

9/6/2010   10:36:35 AM

9/6/2010   10:36:35 AM