Fujitsu AOUH18LMAS1, 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 Fan mode
Speed (rpm)
AOUH18LMAS1 AOUH24LMAS1
Heating
PO→ERFUL 1,490 1,280
HIGH 1,390 1,180
MED+ 1,320 1,040
MED 1,210 900
LO→ 960 770
QUIET 810 680
Cool air prevention 680 550
S-LO→ 540 450
Cooling/Fan
PO→ERFUL 1,460 1,160
HIGH 1,360 1,060
MED 1,180 900
LO→ 960 770
QUIET 810 680
Soft quiet
680*
1
550*
1
S-LO→
540*
2
450*
2
Dry
↓ zone: 860
J zone: 810
↓ zone: 680
J zone: 640
*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)
When room
temperature rises
When room
temperature drops
Tr - Ts ≥ 4°F (2 °C)
HIGH mode
MED mode
LOW mode
4°F (2 °C) > Tr - Ts ≥ 2°F (1 °C)
2°F (1 °C) > Tr - Ts
Tr - Ts ≥ 5°F (2.5 °C)
5°F (2.5 °C) > Tr - Ts ≥ 3°F (1.5 °C)
3°F (1.5 °C) > Tr - Ts
3-1. Indoor fan control
- (04-9) -
3. Fan control
C
O
N
TR
O
L
A
N
D
FU
N
C
TI
O
N
S
C
O
N
TR
O
L
A
N
D
FU
N
C
TI
O
N
S