Fujitsu AGHG09KVCA, Manual, Page: 295 / 403


Heating operation
Switch the airflow AUTO, and the indoor fan motor will run according to a room temperature, as be-
low.
On the other hand, if switched in HIGH—QUIET, the indoor motor will run at a constant airflow of
HEAT operation modes QUIET, LOW, MED, HIGH as shown in “Fan speed” above.
Airflow change over (Heating: Auto)
When the room
temperature rises
When the room
temperature drops
LOW mode
MED mode
HIGH mode
Tr - Ts ≥ -1 °C
-2 °C > Tr - Ts
Tr - Ts ≥ -1.5 °C
-1.5 °C > Tr - Ts ≥ -2.5 °C
-2.5 °C > Tr - Ts
-1 °C > Tr - Ts ≥ -2 °C

Cool air prevention control (heating mode)
The maximum value of the indoor fan speed is set as shown below, based on the detected tempera-
ture by the indoor heat exchanger sensor on heating mode.
• Normal operation
Indoor heat exchanger
temperature rises
S-LOW
Indoor heat exchanger
temperature drops
37°C
29°C
32°C
24°C
Setting fan mode
LOW
or setting fan mode*
*: Lower speed is selected.
13 minutes later:
Indoor heat exchanger
temperature rises
Indoor heat exchanger
temperature drops
37°C
29°C
32°C
24°C
Setting fan mode
LOW
or setting fan mode*
*: Lower speed is selected.
LOW
or setting fan mode*
• 10 °C HEAT operation
Indoor heat exchanger
temperature rises Indoor heat exchanger
temperature drops
37°C
32°C
LOW
AUTO
3-1. Indoor fan control
- (04-33) -
3. Fan control
CONTROL AND FUNCTIONS CONTROL AND FUNCTIONS