Outdoor Fan Control - Fujitsu ASTG30KMTC 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: AOTG30KMTC
Fan speed is defined by outdoor temperature and compressor frequency.
• Outside air temperature zone selection
Fan step
Y zone
S-HIGH2
S-HIGH1
HIGH3
HIGH2
HIGH1
MED2
MED1
LOW2
LOW1
NOTE: After defrost control on the heating mode, the fan speed is kept higher regardless of the
compressor frequency.
Fan speed after defrost control: 900 rpm
3-2. Outdoor fan control
Outside air
temperature rises
21°C
12°C
2°C
-8°C
Cooling
Heating
Z zone
— —
— —
800 —
800 500
750 400
700 360
620 320
500 280
400 250
Outside air
temperature drops
Y zone
Z zone
F zone
G zone
H zone
Dry Cooling or dry at low outdoor temp.
Y or Z zone F zone
900 —
900 —
— —
830 —
830 320
800 —
620 280
550 —
450 280
- (04-11) -
19°C
10°C
0°C
-10°C
Unit: rpm
G zone
— —
— —
— —
— —
350 300
— —
250 230
— —
230 200
H zone
—
—
—
—
230
—
200
—
200
3. Fan control