Fan Control; Indoor Fan Control - Fujitsu AMUG30LMAS 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)
Tr - Ts ≥ 4°F
4°F (2°C) > Tr - Ts ≥ 2°F
2°F
¢ Dry operation
During dry operation, fan speed setting can not be changed as shown in "Fan speed" above.
3-1. Indoor fan control
Fan mode
AMUG30LMAS
HIGH
MED
LOW
QUIET
S-LOW
HIGH
MED
LOW
QUIET
Soft quiet
300*
S-LOW
300*
HIGH mode
(2°C)
MED mode
(1°C)
LOW mode
(1°C) > Tr - Ts
When room
temperature drops
Speed (rpm)
AMUG36LMAS
870 1,200
730 740
590 590
310 490
300 480
870 1,200
730 740
590 590
310 490
1
480*
2
480*
310 490
Tr - Ts ≥ 5°F
5°F
3°F
When room
temperature rises
- (04-9) -
AMUG48LMAS
1,640
1,020
820
590
480
1,640
1,020
820
590
1 1
480*
2 2
480*
590
(2.5°C)
(2.5°C) > Tr - Ts ≥ 3°F (1.5°C)
(1.5°C) > Tr - Ts
3. Fan control