Indoor Fan Control - Fujitsu AB*30LBAG series Service Instruction

5-5. INDOOR FAN CONTROL

1. Fan speed
( Table 5 : Indoor Fan Speed )
AB*30LBAG
Operation mode
Heating
Cooling
AB*45LBAG
Operation mode
Heating
Cooling
2. FAN OPERATION
The airflow can be switched in 4 steps such as AUTO, LOW, MED, HIGH, while the indoor
fan only runs.
When [AUTO] is selected, the indoor fan motor runs LO and OFF at 1 minute intervals.
3. COOLING OPERATION
Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature,
as shown in Figure 5.
On the other hand, if switched in [HIGH]
operation modes LOW, MED, HIGH,as shown in Table 5.
( Fig.5 : Airflow change - over ( Cooling : AUTO ) )
TR-Ts > 2 degC
=
2 degC > TR-Ts > 1 degC
=
1 degC > TR-Ts
Air flow mode Speed (rpm)
Hi
Me
Lo
S-Lo
Hi
Me
Lo
S-Lo
Air flow mode Speed (rpm)
Hi
Me
Lo
S-Lo
Hi
Me
Lo
S-Lo
[LOW], the indoor motor will run at a constant airflow of [COOL]
*1
HIGH mode
MED mode
LOW mode
When the room
temperature drops
AB*36LBAG
Operation mode
1000 Heating
850
650
200
Cooling
1000
850
650
200
1200
1100
950
200
1200
1100
950
200
When the room
temperature rises
TR-Ts > 3 degC
=
3 degC > TR-Ts > 2 degC
2 degC > TR-Ts
*1 : Contains a condition to the following
When the operation mode is set to AUTO mode
at the start of operation.
When the setting temperature was changed.
When the operation mode was changed to COOLING mode.
When the airflow mode was changed to AUTO mode.
05-05
Air flow mode
Hi
Me
Lo
S-Lo
Hi
Me
Lo
S-Lo
TR : Room temperature
Ts : Setting temperature
=
Speed (rpm)
1100
900
750
200
1100
900
750
200