Fujitsu AO*G09LTCN, Service Instructions Manual

Page: 10 / 71

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 )
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. 5
On the other hand, if switched in [Hi] [Quiet], the indoor motor will run at a constant airflow
of [Heat] operation modes Quiet, Lo, Me, High, as shown in Table 6.
6. COOL AIR PREVENTION CONTROL (Heating mode)
( Fig.5 : 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
Lo mode
Me mode
Me+ mode
42°C
30°C
34°C
Indoor heat exchanger
temperature rises
Indoor heat exchanger
temperature drops
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.7.
7. MOISTURE RETURN PREVENTION CONTROL (Cooling mode& Dry mode)
( Fig.7 : Indoor fan control )
Compressor
ON
OFF
Indoor fan
Setting air flow
Indoor fan
(as shown in Table 6)
S-Lo
OFF
10 30 60 180 60 180 60 10 30
(sec)
( Table 6 : Indoor fan speed )
X zone J zone
AS*G09/12LTCB
650rpm 610rpm
Y zone
0 570rpm 650rpm
AS*G14LTCB 740rpm 710rpm 0 570rpm 740rpm
Dry
Cooling
42°C
30°C
34°C
Indoor heat exchanger
temperature rises
Indoor heat exchanger
temperature drops
Powerful
Hi
Lo
Cool air
prevention
39°C
37°C
37°C
32°C
28°C
S-Lo
<Normal operation>
<Powerful operation>