Indoor Fan Control - Fujitsu ASU18RLF Service Instructions Manual

5. INDOOR FAN CONTROL

1. Fan speed
( Table4 : Indoor Fan Speed )
Operation mode
Heating
Cooling/ Fan
Dry
2. FAN OPERATION
The airflow can be switched in 5 steps such as AUTO, QUIET, LOW, MED, HIGH,
while the indoor fan only runs.
When Fan mode is set at (Auto), it operates on (MED) Fan Speed.
3. COOLING OPERATION
Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature,
as shown in Figure3.
On the other hand, if switched in [HIGH]
operation modes QUIET, LOW, MED, HIGH,as shown in Table4.
( Fig.3 : Airflow change - over ( Cooling : AUTO ) )
TR-Ts > 4°F
4°F > TR-Ts > 2°F
(2°C)
2°F > TR-Ts
(1°C)
Air flow mode
Hi
Me+
Me
Lo
Quiet
Cool air prevention
S-Lo
Hi
Me
Lo
Quiet
HIGH mode
(2°C)
MED mode
=
(1°C)
LOW mode
When the room
temperature drops
Speed (rpm)
ASU18RLF ASU24RLF
1260 1530
1120 1320
1020 1220
900 1020
790 900
680 720
270 270
1260 1480
1020 1220
900 1020
770 900
X zone : 770 X zone : 900
J zone : 720 J zone : 850
[QUIET], the indoor motor will run at a constant airflow of [COOL]
TR-Ts > 5°F
5°F > TR-Ts > 3°F
(2.5°C)
3°F > TR-Ts
(1.5°C)
When the room
temperature rises
TR : Room temperature
Ts : Setting temperature
01-04
=
(2.5°C)
=
(1.5°C)