Fujitsu ADUH09LUAS1 Service Manual page 123

¢ Dry operation
During dry operation, fan speed setting can not be changed as shown in "Fan speed" above.
¢ 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, LO→, MED, HIGH as shown in "Fan speed" above.
Airflow change over (Heating: Auto)
Tr - Ts ≥ -2°F
-2°F (1°C) > Tr - Ts ≥ -4°F
-4°F
¢ 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
13 minutes later:
• MIN. HEAT operation
3-1. Indoor fan control
When the room
temperature rises
(1°C)
(2°C)
(2°C) > Tr - Ts
Indoor heat exchanger
temperature rises
Setting fan mode
98.6°F
(37°C)
LOW
or setting fan mode*
84.2°F
(29°C)
*: Lower speed is selected.
Indoor heat exchanger
temperature rises
Setting fan mode
98.6°F
(37°C)
LOW
or setting fan mode*
84.2°F
LOW
(29°C)
or setting fan mode*
*: Lower speed is selected.
Indoor heat exchanger
temperature rises
98.6°F
(37°C)
When the room
temperature drops
LOW mode
MED mode
HIGH mode
Indoor heat exchanger
temperature drops
S-LOW
Indoor heat exchanger
temperature drops
Indoor heat exchanger
temperature drops
AUTO
LOW
- (04-11) -
Tr - Ts ≥ -3°F (1.5°C)
-3°F (1.5°C) > Tr - Ts ≥ -5°F
-5°F (2.5°C) > Tr - Ts
89.6°F
(32°C)
75.2°F
(24°C)
89.6°F
(32°C)
75.2°F
(24°C)
89.6°F
(32°C)
(2.5°C)
3. Fan control