Indoor Fan Control - Fujitsu ASU 9RLF 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
(2°C)
4°F > TR-Ts > 2°F
=
(2°C) (1°C)
2°F > TR-Ts
(1°C)
Air flow mode
ASU9RLF
Hi
Me+
Me
Lo
Quiet
Cool air prevention
S-Lo
Hi
Me
Lo
Quiet
[QUIET], the indoor motor will run at a constant airflow of [COOL]
HIGH mode
MED mode
LOW mode
When the room
temperature drops
01-04
Speed (rpm)
ASU12RLF
1330
1290
1160
980
710
600
480
1330
1160
930
680
X zone: 680
J zone: 660
TR-Ts > 5°F
=
(2.5°C)
5°F > TR-Ts > 3°F
=
(2.5°C) (1.5°C)
3°F > TR-Ts
(1.5°C)
When the room
temperature rises
TR : Room temperature
Ts : Setting temperature
ASU15RLS
1500
1360
1230
1050
770
600
480
1440
1230
1000
750
X zone: 750
J zone: 730