An open loop cooling system means the ambient air enters the cabinet and is passed over the heat producing components to keep hot spots from forming and is then expelled from the enclosure. Even in the cleanest environments, enclosure cooling fans should have some type of air filtration to keep particulates from entering the enclosure.
Enclosure cooling fan issues often go unnoticed until electrical components begin to malfunction and eventually fail. Regular inspections and routine filter maintenance usually help keep potential problems from happening but issues can arise even if maintenance is regularly done. Read More >>