Fujitsu AB*A30LBT Service Instruction page 21

4. HEATING OPERATION
Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature,
as shown in Figure 7.
On the other hand, if switched in [HIGH]
of [HEAT] operation modes QU, LOW, MED, HIGH, as shown in Table 5.
( Fig.7 : Airflow change - over ( Heating : AUTO ) )
TR-Ts > - 1 °C
=
- 1 °C> TR-Ts > - 2 °C
=
- 2 °C> TR-Ts
5. COOL AIR PREVENTION CONTROL (Heating mode)
When the compressor operates, the maximum value of the indoor fan speed is set as shown in Figure 8,
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] mode.
( Fig.8 : Cool Air Prevention Control )
< [Hi] setting >
Indoor heat exchanger
temperature
42°C
39°C
37°C
30°C
6. DRY OPERATION
Refer to the Figure 4.
During the dry mode operation, the fan speed setting can not be changed.
[QU], the indoor motor will run at a constant airflow
When the room
temperature rises
LOW mode
MED mode
HIGH mode
Indoor heat exchanger
temperature
Hi
Me+
Lo
Cool air
prevention
S-Lo
[ AB*A30/36LBT : Cool air prevention 500rpm, S-Lo 250rpm ]
05-06
When the room
temperature drops
TR-Ts > - 1.5 °C
=
- 1.5 °C> TR-Ts > - 2.5 °C
- 2.5 °C> TR-Ts
< The other of [Hi] setting >
Indoor heat exchanger
temperature
39°C
37°C
37°C
34°C
30°C
32°C
24°C
TR : Room temperature
Ts : Setting temperature
=
Indoor heat exchanger
Setting
temperature
FAN mode
Lo (Qu)
Cool air
prevention
S-Lo
34°C
32°C
24°C