Outdoor Fan Control - Fujitsu ASU18RLB Service Instructions Manual

6. OUTDOOR FAN CONTROL

1. Outdoor Fan Motor
The Table 7 shows the type of the outdoor fan motor.
The control method is different between AC motor and DC motor.
( Table 7 : Type of motor )
AOU18RLB
AOU24RLB
2. Fan Speed
( Table 8 : Outdoor fan speed )
AOU18RLB
AOU24RLB
Refer to Fig. 8
( Fig. 8 : Outside air temperature zone selection )
Outside air
temperature rises
70°F
(21°C)
54°F
(12°C)
36°F
(2°C)
* The outdoor fan speed mentioned above depends on the compressor frequency.
(When the compressor frequency increases, the outdoor fan speed also changes to the higher
speed. When the compressor frequency decreases, the outdoor fan speed also changes to the
lower speed.)
* After the defrost control is operated on the heating mode, the fan speed keeps at the higher speed
as Table 9 without relating to the compressor frequency.
( Table 9 : Outdoor fan speed after the defrost )
AOU18RLB
AOU24RLB
AC Motor DC Motor
Zone Cooling
Y 1050/ 870/ 720/ 530
Z 870/530/300
F 300
G
250/ 200
Y 1050/ 870/ 720/ 530
Z 870/530/300
F 300
G 250/ 200
Outside air
temperature drops
Y zone
Z zone
F zone
G zone
Fan speed
1100rpm
1100rpm
1100/ 1000/ 780/ 720/ 590/ 480
1100/ 1000/ 780/ 720/ 590/ 480
66°F
(19°C)
50°F
(10°C)
32°F
( 0°C)
01-06
Heating Dry
530
530
(rpm)