Fan Control; Indoor Fan Control - Fujitsu AUXG36KRLB 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
HIGH
MED+
MED
LOW
QUIET
Cool air prevention
S-LOW
HIGH
MED
LOW
QUIET
Soft quiet
S-LOW
Tr - Ts ≥ 2°C
> Tr - Ts ≥ 1°C
1°C > Tr - Ts
When room
temperature drops
Speed (rpm)
AUXG36KRLB AUXG45KRLB
640
600
560
510
430
300
270
640
560
510
430
1
300*
2
270*
X zone: 430 X zone: 470
J zone: 430 J zone: 470
Tr - Ts ≥
HIGH mode
2.5°C
MED mode
1.5°C > Tr - Ts
LOW mode
When room
temperature rises
- (04-10) -
AUXG54KRLB
670 690
630 680
590 630
530 570
470 480
300 300
270 270
670 690
590 630
530 570
470 480
1
300* 300*
2
270* 270*
X zone: 480
J zone: 480
2.5°C
> Tr - Ts ≥ 1.5°C
1
2
3. Fan control