Dani...
Of course, if the fans are not needed, then there is no need to use them. Again, what determines this is your company's SOP.
Just a reminder...and I think you are already aware of this...the certification criteria for an RTO on the SA Airbus limits the brake temps to 150 degrees C. Above this, you may or may not be able to stop in the distance dtermined by the charts.
Fly safe,
PantLoad