Fujitsu AS*G09LTCB Service Instructions Manual page 10

5. HEATING OPERATION
Switch the airflow [Auto], and the indoor fan motor will run according to a room temperature,
as shown in Fig. 5
On the other hand, if switched in [Hi]
of [Heat] operation modes Quiet, Lo, Me, High, as shown in Table 6.
( Fig.5 : Airflow change - over ( Heating : Auto ) )
When the room
temperature rises
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.6 based on the detected
temperature by the indoor heat-exchanger sensor on heating mode.
( Fig.6 : Cool air prevension control )
<Normal operation>
Indoor heat exchanger
temperature rises
42°C
39°C
37°C
Cool air
prevention
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.7.
( Fig.7 : Indoor fan control )
Compressor
ON
OFF
Indoor fan
Setting air flow
Indoor fan
(as shown in Table 6)
S-Lo
OFF
10
( Table 6 : Indoor fan speed )
AS*G09/12LTCB
AS*G14LTCB
[Quiet], the indoor motor will run at a constant airflow
Lo mode
Me mode
Me+ mode
Indoor heat exchanger
temperature drops
Hi
37°C
Me+
34°C
Lo
32°C
28°C
S-Lo
30 60
Dry
X zone J zone
650rpm 610rpm
740rpm 710rpm
When the room
temperature drops
TR-Ts > -1.5°C
=
-1.5°C > TR-Ts > -2.5°C
-2.5°C > TR-Ts
Indoor heat exchanger
temperature rises
42°C
39°C
37°C
30°C
180 60
Cooling
Y zone
0 570rpm 650rpm
0 570rpm 740rpm
01-05
=
TR : Room temperature
Ts : Setting temperature
<Powerful operation>
Indoor heat exchanger
temperature drops
Powerful
Hi
Lo
Cool air
prevention
S-Lo
180 60 10
37°C
34°C
32°C
28°C
30
(sec)