Fan Control; Indoor Fan Control - Fujitsu GENERAL ASHG18KMTE 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, 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)
1.5°C
3-1. Indoor fan control
Fan mode
PO→ERFUL
HIGH
MED+
MED
LO→
QUIET
Cool air prevention
S-LO→
PO→ERFUL
HIGH
MED
LO→
QUIET
Soft quiet
S-LO→
Tr - Ts ≥ 1.5°C
> Tr - Ts ≥ 0.5°C
0.5°C > Tr - Ts
When room
temperature drops
Speed (rpm)
ASHG18KMTE
1,400
1,300
1,230
1,130
900
760
650
520
1,400
1,260
1,080
900
760
1
650*
2
520*
↓ zone: 760
J zone: 670
Tr - Ts ≥
MED mode
2.5°C
LOW mode
1.5°C > Tr - Ts
LOW mode
When room
temperature rises
- (04-9) -
ASHG24KMTE
1,570
1,470
1,230
1,130
900
760
650
520
1,570
1,470
1,130
900
760
1
650*
2
520*
↓ zone: 760
J zone: 670
2.5°C
> Tr - Ts ≥ 1.5°C
3. Fan control