Fan Control; Indoor Fan Control - Fujitsu ASTG30KMTC Service Manual

3. Fan control

Tr: Room temperature
Ts: Setting temperature

3-1. Indoor fan control

¢ Fan speed
Indoor fan speed is defined as below.
Operation mode
Heating
Cooling/ Fan
Dry
*1: Fan mode only
*2: Cooling mode only
¢ Fan operation
Airflow can be switched in 5 steps such as AUTO, QUIET, LOW, MED, HIGH while indoor unit fan
only runs.
When fan mode is set at AUTO, it operates on MED fan speed.
¢ Cooling operation
Switch the airflow AUTO, and indoor fan motor will run according to room temperature, as below.
On the other hand, if switched in HIGH—QUIET, indoor motor will run at a constant airflow of COOL
operation modes QUIET, LOW, MED, HIGH as shown in "Fan speed" above.
Airflow change over (Cooling: Auto)
2°C
3-1. Indoor fan control
Fan mode
POWERFUL
HIGH
MED+
MED
LOW
QUIET
Cool air prevention
S-LOW
POWERFUL
HIGH
MED
LOW
QUIET
Soft quiet
S-LOW
Tr - Ts ≥ 2°C
> Tr - Ts ≥ 1°C
1°C > Tr - Ts
When room
temperature drops
ASTG30KMTC
1,520
1,370
1,260
1,150
950
780
600
540
1,520
1,370
1,150
950
780
1
600*
2
540*
X zone: 780
J zone: 680
Tr - Ts ≥
HIGH mode
2.5°C
MED mode
1.5°C > Tr - Ts
LOW mode
When room
temperature rises
- (04-8) -
Speed (rpm)
ASTG34KMTC
1,520
1,370
1,260
1,150
950
780
600
540
1,520
1,370
1,150
950
780
1
600*
2
540*
X zone: 780
J zone: 680
2.5°C
> Tr - Ts ≥ 1.5°C
3. Fan control