Outdoor Fan Control - Fujitsu AB F18LAT Series Service Instruction

1-6. OUTDOOR FAN CONTROL

1. Outdoor Fan Motor
Following table shows the fan speed of the outdoor unit.
Table 6 : Fan speed of the outdoor unit
AO*A18LALL
AO*B18LALL
AO*A24LALL
AO*B24LALL
AO*A18LALL
AO*B18LALL
AO*A24LALL
AO*B24LALL
The outdoor fan speed is changed in the range of the speed shown in the above table,
based on the frequency of the compressor.
(When the compressor frequency increases, the outdoor fan speed is also changed to
higher speed. If the compressor frequency decreases, the outdoor fan speed is changed
to the lower speed as well.)
After starting up the outdoor fan, it operates with the following speed for initial 20 seconds.
Table 7 : Fan speed when starting up outdoor fan
AO*A18/24LALL
AO*B18/24LALL
After operating the defrost control function on heating mode except economy operation,
its speed becomes 1020/ 950rpm (18L) and 1100/ 1050rpm (24L) regardless of the
compressor frequency.
However, it returns to the normal speed control when the defrosting operation does not function
for 240 minutes after releasing the defrost operation or when the outdoor temperature sensor
detection value becomes higher than 5°C.
Outdoor temperature
Over than 12°C
Less than 12°C
Over than 12°C
Less than 12°C
Heating
1020/ 950/ 820/ 750/ 670/ 550/ 450 rpm
1100/ 1050/ 1000/ 730/ 670/ 550/ 450 rpm
Outdoor temperature
Over than 12°C
Less than 12°C
Cooling
860/ 820/ 670/ 500 rpm
400/ 340/ 280/ 250/ 230 rpm
950/ 820/ 670/ 500 rpm
400/ 340/ 280/ 250/ 230 rpm
Fan speed
500 rpm
200 rpm
01-08
Dry
500 rpm
500 rpm