Fujitsu ASU9RLQ Service Instructions Manual page 22

(3).COOLING OPERATION
Switch the airflow [AUTO], and the
indoor fan motor will run according
to a room temperature, as shown in
Figure 6.
On the other hand, if switched in
[HIGH] [QUIET], the indoor motor
will run at a constant airflow of [COOL]
operation modes QUIET, LOW, MED,
HIGH, as shown in Table 5.
(4).DRY OPERATION
Refer to the table 4.
Durring the dry mode operation, the fan speed
setting can not be changed.
(5).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
[HIGH] [QUIET], the indoor motor
will run at a constant airflow of [HEAT]
operation modes QUIET, LOW, MED,
HIGH, as shown in Table 5.
(6).COOL AIR PREVENTION CONTROL (Heating mode)
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.
(Fig.8 : Cool Air Prevention Control)
Indoor heat exchanger
temperature
117°F (47°C)
104°F (40°C)
99°F (37°C)
86°F (30°C)
(Fig.6)
airflow change - over ( Cooling:AUTO )
+4°F(+2°C)
+2°F(+1°C)
(Room temperature) D (Setting temperature)
(Fig.7)
airflow change - over ( Heating:AUTO)
When the room
temperature rises
-2°F (-1°C)
-4°F (-2°C)
(Room temperature) D (Setting temperature)
Hi
Me+
Lo
Cool air prevention
S-Lo
05-06
HIGH mode
MED mode
LOW mode
When the room
temperature lowers
LOW mode
MED mode
MED + mode
When the room
temperature lowers
Indoor heat exchanger
temperature
104°F (40°C)
93°F (34°C)
90°F (32°C)
82°F (28°C)
When the room
temperature rises
+5°F(+2.5°C)
+3°F (+1.5°C)
-3°F (-1.5°C)
-5°F (-2.5°C)