Indoor Fan Control - Fujitsu ASU 9RLF1 Service Instruction

5. INDOOR FAN CONTROL

1. Fan speed
( Table 4 : Indoor Fan Speed )
Operation mode
Heating
Cooling/ Fan
Dry
*Note, during Economy operation and operation mode is Fan, air flow is 1 step downs.
(Hi > Me, Me > Lo, Lo > Quiet, Quiet > Soft Quiet)
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 Fig. 3.
On the other hand, if switched in [HIGH]
operation modes QUIET, LOW, MED, HIGH,as shown in Table 4.
( 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
Poweful
Hi
Me+
Me
Lo
Quiet
Cool air prevention
S-Lo
Poweful
Hi
Me
Lo
Quiet
*Soft Quiet
Hi mode
(2°C)
Me mode
=
(1°C)
Lo mode
When the room
temperature drops
Speed (rpm)
ASU9RLF1 ASU12RLF1
1380
1320
1280
1160
980
710
600
480
1380
1320
1160
930
680
600
X zone: 680
J zone: 660
[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)