Indoor Fan Control - Fujitsu ARU9RLF Service Instruction

5. INDOOR FAN CONTROL

1. Fan speed
( Table 5 : 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 Fig. 4.
On the other hand, if switched in [High]
operation modes Quiet, Low, Med, High, as shown in Table 5.
( Fig. 4 : Airflow change - over ( Cooling : Auto ) )
TR-Ts > 4°F
4°F > TR-Ts > 2°F
=
(2°C)
2°F > TR-Ts
(1°C)
4. DRY OPERATION
Refer to the Table 5.
During the dry mode operation, the fan speed setting can not be changed.
Air flow mode
ARU9RLF
High
Med
Low
Quiet
S-Low
High
Med
Low
Quiet
S-Low
X zone: 960
J zone: 960
[Quiet], the indoor motor will run at a constant airflow of [Cool]
High mode
(2°C)
Med mode
(1°C)
Low mode
When the room
temperature drops
Speed (rpm)
ARU12RLF
1260 1340
1160 1240
1060 1140
960 1030
500 500
1260 1340
1160 1240
1060 1140
960 1030
500 500
X zone: 1030
J zone: 1030
TR-Ts > 5°F
=
(2.5°C)
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
ARU18RLF
1380
1300
1220
1140
600
1380
1300
1220
1140
600
X zone: 1140
J zone: 1140
=
(1.5°C)