Fujitsu ABU18RULX Service Instruction page 9

4. HEATING OPERATION
When the airflow is set to [AUTO], the indoor fan
motor operates [MED] mode.
Then the indoor fan motor will run according
to a room temperature, as shown in Figure 6.
On the other hand, if switched in [HIGH]
the indoor motor will run at a constant airflow
of [COOL] operation modes LOW, MED, HIGH,
as shown in Table 5.
5. COOL AIR PREVENTION CONTROL (Heating mode)
The maximum value of the indoor fan speed is set as shown in Figure 7, based on the detected
temperature by the indoor heat exchanger sensor on heating mode.
( Fig.7 : Cool Air Prevention Control )
Indoor heat exchanger
temperature
SETTING
FAN MODE
91.4°F
(33°C)
LO mode
86°F
S-LOW mode
(30°C)
6. DRY OPERATION
Refer to the Figure 4.
During the dry mode operation, the fan speed setting can not be changed.
( Fig.6 : Airflow change - over ( Heating : AUTO ) )
Indoor heat exchanger
temperature
[LOW],
116.6°F
(47°C)
105.8°F
(41°C)
Indoor heat exchanger
temperature
86°F
(30°C)
01-06
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