Outdoor Fan Control - Fujitsu ASUH24LPAS Service Manual

3-2. Outdoor fan control

¢ Outdoor fan motor
This outdoor unit has a DC fan motor. (Control method is different between AC and DC motors.)
¢ Fan speed
 Model: AOUH18LPAS1
Fan speed is defined by outdoor temperature and rotation number of compressor.
• Outside air temperature zone selection
Cooling
Fan step
Y zone
S-HIGH2
S-HIGH1 1,050
HIGH 1,050
10
9
8
7
6
5
4
3
2
1
NOTE: After defrost control on the heating mode, the fan speed is kept higher regardless of the
compressor rotation number.
Fan speed after defrost control: 1,100 rpm
3-2. Outdoor fan control
Outside air
temperature rises
69.8°F
( 21°C)
53.6°F
( 12°C)
35.6°F
( 2°C)
17.6°F
( -8°C)
Heating
Y zone
— 1,100
1,100
1,100
— 1,100
920 1,100
840 920
750 920
690 710
560 620
440 560
440 500
440 440
440 440
Outside air
temperature drops
Y zone
Z zone
F zone
G zone
H zone
Dry Cooling or dry at low outdoor temp.
Z zone F zone
— —
— —
— —
— —
920 630
840 630
750 320
690 320
560 320
440 320
440 320
440 320
440 320
- (04-12) -
66.2 °F
(19°C)
50.0 °F
(10°C)
32.0 °F
(0°C)
14.0°F
( -10°C)
Unit: rpm
G zone
— —
— —
— —
— —
320 270
270 250
270 230
270 230
270 230
270 230
270 230
270 230
270 230
H zone
—
—
—
—
270
250
230
230
230
230
230
230
230
3. Fan control