Fujitsu AS*G24LFCA Service Instruction page 9

5. HEATING OPERATION
Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature,
as shown in Fig.4.
On the other hand, if switched in [HIGH]
of [HEAT] operation modes QUIET, LOW, MED, HIGH, as shown in Table5.
( Fig.4 : Airflow change - over ( Heating : AUTO ) )
TR-Ts > -1°C
=
-1°C > TR-Ts > -2°C
=
-2°C > TR-Ts
6. COOL AIR PREVENTION CONTROL (Heating mode)
The maximum value of the indoor fan speed is set as shown in Fig.5, based on the detected
temperature by the indoor heat exchanger sensor on heating mode.
( Fig.5 : Cool Air Prevention Control )
Indoor heat exchanger
temperature
42°C
39°C
37°C
30°C
7. MOISTURE RETURN PREVENTION CONTROL (Cooling mode& Dry mode)
Switch the airflow [AUTO] at cooling mode, and the indoor fan motor will run as shown in Fig.6.
8. INDOOR UNIT FAN CONTROL FOR ENEGY SAVING (Cooling mode)
Switch the airflow at cooling mode, and the indoor fan motor will run as shown in Fig.6.
It depends on the function setting "Indoor unit fancontrol for energy saving"
( Fig.6 : Indoor Fan Control )
Compressor
ON
OFF
Indoor fan
Setting air flow
Indoor fan
(as shown in Table 5)
S-Lo
OFF
( Table5 : Indoor fan speed )
AS*G24LFCA / LFCC
AS*G30LFCA
[QUIET], the indoor motor will run at a constant airflow
When the room
temperature rises
LOW mode
MED mode
MED+ mode
Indoor heat exchanger
temperature
Hi
Me+
Lo
Cool air
prevention
S-Lo
10 30 60
X zone J zone
860rpm 780rpm
900rpm 780rpm
When the room
temperature drops
TR-Ts > -1.5°C
=
-1.5°C > TR-Ts > -2.5°C
-2.5°C > TR-Ts
37°C
34°C
32°C
28°C
180 60
Dry
Y zone
0 270rpm ( 24LFCC: 480rpm)
0 270rpm
01-05
=
TR : Room temperature
Ts : Setting temperature
180 60 10
Cooling
860rpm
900rpm
30
(SEC)