Fujitsu AO*G24LFLAO*G24LFCC, Service Instruction

Page: 9 / 75

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