Fan Control; Indoor Fan Control - Fujitsu AUXG18KVLA Service Manual

3. Fan control

Tr: Room temperature
Ts: Setting temperature

3-1. Indoor fan control

¢ Compact cassette type
 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)
AUXG18KVLA AUXG22KVLA
830
770
730
630
500
400
300
730
630
540
460
1
400*
2
300*
X zone: 460 X zone: 500
J zone: 460 J zone: 500
Tr - Ts ≥
HIGH mode
2.5°C
MED mode
1.5°C > Tr - Ts
LOW mode
When room
temperature rises
- (04-12) -
AUXG24KVLA
880 960
850 930
800 880
740 740
580 580
400 400
300 300
860 960
770 850
650 650
500 500
1
400* 400*
2
300* 300*
X zone: 500
J zone: 500
2.5°C
> Tr - Ts ≥ 1.5°C
1
2
3. Fan control