Indoor Fan Control - Fujitsu ASU9RL Service Instruction

5. INDOOR FAN CONTROL

1. Fan speed
( Table 6 : Indoor Fan Speed )
ASU9 / 12RL
Operation mode
Heating
Cooling
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 Figure 6.
On the other hand, if switched in [HIGH]
operation modes QUIET, LOW, MED, HIGH,as shown in Table 6.
( Fig.6 : Airflow change - over ( Cooling : AUTO ) )
TR-Ts > 4°F(2°C)
=
4°F(2°C) > TR-Ts > 2°F(1°C)
=
2°F(1°C) > TR-Ts
Air flow mode Speed (rpm)
Hi
1440
Me+
1370
Me
1200
Lo
980
Quiet 700
Cool air prevention 600
480
S-Lo
Hi 1440
Me 1200
Lo 920
Quiet
680
X zone: 680
J zone: 650
[QUIET], the indoor motor will run at a constant airflow of [COOL]
HIGH mode
MED mode
LOW mode
When the room
temperature drops
TR-Ts > 5°F(2.5°C)
=
5°F(2.5°C) > TR-Ts > 3°F(1.5°C)
3°F(1.5°C) > TR-Ts
When the room
temperature rises
TR : Room temperature
Ts : Setting temperature
05-05
=