Asus AP2500 Hardware Reference - Page 15
Chassis Circulation System, Rear Cooling Fans
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II. Components II. System Components Chassis Circulation System The circulation system cools the hard disk drives by bringing fresh air in from the side of the server and forcing the hot air out through the back. The server's air circulation system is comprised of two 3 inch (8 cm) fans mounted in a removable module which brings cool air in from the outside to cool the hard disk drives. Another set of two 2 1/4 inch (6 cm) cooling fans mounted on the chassis, forces the warm air out of the chassis. The two fans in each module provides redundancy in order to increase air flow as well as insure continued circulation if one fan should fail. This circulation system should ensure that the air surrounding the hard disk drives are kept below 122˚F (50˚C) to prevent hard disk failures. Rear Cooling Fans The system fan modules on the rear is held by two screws and four latches on the interior of the chassis. There are four screws used to secure the fan into the individual frames. The fan module's operating status can be viewed through the ASUS ASMA software. If an individual fan fails, remove the fan and send it back to the vendor for replacement. If both fans fail, it may be that the fan control board needs replacing. If the fans do not work after replacing both of them, remove the control board and send it back to your vendor for replacement. Four Latches Top Fan Two Screws Bottom Fan Air flows out through the back Rear fan modules Screw Locations Usually, the rotation of the fan sends air toward the manufacturer's label on the center of the fan. Individual fan with frame AP2500 Hardware Reference Guide 15