Fujitsu AO G18LBCA Series Service Instruction page 10

4. HEATING OPERATION
Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature,
as shown in Fig.6.
On the other hand, if switched in [Hi ] ~ [Lo ], the indoor motor will run at a constant airflow
of [HEAT] operation modes Lo, Me, Hi , as shown in Table5.
( Fig.6 : Airflow change - over ( Heating : AUTO ) )
Indoor heat exchanger
temperature
TR-Ts > -1.0°C
=
1.0°C > TR-Ts > -2.0°C
=
-2.0°C > TR-Ts
5. COOL AIR PREVENTION CONTROL (Heating mode)
The maximum value of the indoor fan speed is set as shown in Fig.7, based on the detected
temperature by the indoor heat exchanger sensor on heating mode.
When the compressor does not operate, the indoor fan motor operates [S-Lo] or [Stop] mode.
( Fig.7 : Cool Air Prevention Control )
Indoor heat exchanger
temperature rises
Hi
42°C
*Me+
or setting fan mode
39°C
*Lo
or setting fan mode
37°C
Cool air
prevention
30°C
S-Lo
6. DRY OPERATION
Refer to the table 5.
During the dry mode operation, the fan speed setting can not be changed.
Lo mode
Me mode
Hi mode
Indoor heat exchanger
temperature drops
37°C
34°C
32°C
24°C
*Lower speed is selected.
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
13 min. later
30°C
01-07
=
Indoor heat exchanger
temperature drops
Hi
*Me+
or setting fan mode
*Lo
or setting fan mode
*Lo
or setting fan mode
*Lo
or setting fan mode
*Lower speed is selected.
37°C
34°C
32°C
24°C