Fan Control; Indoor Fan Control - Fujitsu ARXG45KMLA 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
¢ Fan operation
Airflow can be switched in 5 steps such as AUTO, QUIET, LO→, MED, HIGH while indoor unit fan
only runs.
→hen 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, LO→, MED, HIGH as shown in "Fan speed" above.
Airflow change over (Cooling: Auto)
2°C
3-1. Indoor fan control
Fan mode
HIGH
MED
LO→
QUIET
S-LO→
HIGH
MED
LO→
QUIET
S-LO→
HIGH
MED
LO→
QUIET
Soft quiet
Tr - Ts ≥ 2°C
> Tr - Ts ≥ 1°C
1°C > Tr - Ts
When room
temperature drops
ARXG36KMLA
1,270
980
790
630
420
1,130
980
790
630
420
1,270
980
790
630
420
↓ zone: 630
J zone: 630
Tr - Ts ≥
HIGH mode
2.5°C
MED mode
1.5°C > Tr - Ts
LOW mode
When room
temperature rises
- (04-9) -
Speed (rpm)
ARXG45KMLA
1,300
1,020
840
670
420
1,310
1,020
840
670
420
1,310
1,020
840
670
420
↓ zone: 670
J zone: 670
2.5°C
> Tr - Ts ≥ 1.5°C
3. Fan control