Fan Control; Indoor Fan Control - Fujitsu ADUH09LUAS1 Service Manual

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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)
Tr - Ts ≥ 4°F
4°F
(2°C)
> Tr - Ts ≥ 2°F
2°F
3-1. Indoor fan control
Fan mode
ADUH09LUAS1
HIGH
1,260
MED
1,160
LO→
1,060
QUIET
S-LO→
HIGH
1,260
MED
1,160
LO→
1,060
QUIET
Soft quiet
500*
S-LO→
500*
↓ zone: 960
J zone: 960
HIGH mode
(2°C)
MED mode
(1°C)
LOW mode
(1°C) > Tr - Ts
When room
temperature drops
Speed (rpm)
ADUH12LUAS1
1,340
1,240
1,140
960
1,030
500
500
1,340
1,240
1,140
960
1,030
1
500*
2
500*
↓ zone: 1,030
J zone: 1,030
Tr - Ts ≥ 5°F
5°F
3°F
When room
temperature rises
- (04-10) -
ADUH18LUAS1
1,380
1,300
1,220
1,140
600
1,380
1,300
1,220
1,140
1
1
600*
2
2
600*
↓ zone: 1,140
J zone: 1,140
(2.5°C)
(2.5°C)
> Tr - Ts ≥ 3°F
(1.5°C)
(1.5°C) > Tr - Ts
3. Fan control

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