Fujitsu AS G09LTCA Series Service Instruction 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
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.
8. INDOOR UNIT FAN (ONTROL FOR ENERGY SAVING (Cooling mode)
Switch the airflow at cooling mode, and the indoor fan motor will run as shown in Fig.7.
It depends on the Function setting "Indoor unit fan control for energy saving."
( Fig.7 : Indoor fan control )
Compressor
ON
OFF
Indoor fan
Setting air flow
Indoor fan
(as shown in Table 7)
S-Lo
OFF
10
( Table 7 : Indoor fan speed )
AS*G07/09/12LUCA
AS*G09/12LTCA
AS*G14LUCA
[Quiet], the indoor motor will run at a constant airflow
Lo mode
Me mode
Me+ mode
Indoor heat exchanger
temperature
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
42°C
39°C
37°C
30°C
180 60
Cooling
Y zone
0 570rpm 650rpm
0 570rpm 740rpm
01-06
=
TR : Room temperature
Ts : Setting temperature
<Powerful operation>
Indoor heat exchanger
temperature
Powerful
Hi
Lo
Cool air
prevention
S-Lo
180 60 10
37°C
34°C
32°C
28°C
30
(sec)