Fujitsu ASU 9RLF1

The maximum value of the indoor fan speed is set as shown in Fig. 5, based on the detected
temperature by the indoor heat exchanger sensor on heating mode.
(Fig. 5 : Cool Air Prevention 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. 4.
Switch the airflow [AUTO] at cooling mode, and the indoor fan motor will run as shown in Fig. 6.
On the other hand, if switched in [HIGH] [QUIET], the indoor motor will run at a constant airflow
of [HEAT] operation modes QUIET, LOW, MED, HIGH, as shown in Table 4.
6. COOL AIR PREVENTION CONTROL (Heating mode)
7. MOISTURE RETURN PREVENTION CONTROL (Cooling mode& Dry mode)
( Fig. 4 : Airflow change - over ( Heating : AUTO ) )
TR-Ts > -3°F
(-1.5°C)
=
-5°F > TR-Ts
(-2.5°C)
-3°F > TR-Ts > -5°F
(-1.5°C) (-2.5°C)
=
TR-Ts > -2°F
(-1°C)
=
-4°F > TR-Ts
(-2°C)
-2°F > TR-Ts > -4°F
(-1°C) (-2°C)
=
When the room
temperature rises
When the room
temperature drops
TR : Room temperature
Ts : Setting temperature
Lo mode
Me mode
Me+ mode
107.6°F (42°C)
86°F (30°C)
93.2°F (34°C)
Indoor heat exchanger
temperature
Indoor heat exchanger
temperature
Hi
Me+
Lo
Cool air
prevention
102.2°F (39°C)
98.6°F (37°C)
98.6°F (37°C)
89.6°F (32°C)
82.4°F (28°C)
S-Lo
( Fig. 6 : Indoor Fan Control )
Compressor
ON
OFF
Indoor fan
Setting air flow
Indoor fan
(as shown in Table 5)
S-Lo
OFF
10 30 60 180 60 180 60 10 30
(SEC)
( Table 5 : Indoor fan speed )
X zone J zone
ASU9/ 12RLF1 680rpm 660rpm 680rpm
Dry
Cooling