No fan drive – very little cooling, if any
The failure of the fan drive on your cooling tower is a major issue that will result in unexpected downtime.
On an industrial site this is the loss of production as there is no cooling water for the process line.
On a commercial building this is the entire air-conditioning system shutting down, so many upset occupants.
On a data center this is all the rooms running too hot causing computer failure, as there is no air-conditioning.
On a health care center this is no air-conditioning to cool operation theaters.