Asus AP140R - Manual (Page 34)

34 Chapter 4: Hardware Options
Chassis Fans
Also included in the server cooling system are chassis fans
that help maintain efficient air circulation among the
components within the chassis. The chassis fans are attached
to the metal bracket between the disk drives and the
motherboard components.
3.3 Cooling System
Make sure that the chassis fan cables are connected to the
chassis fan connectors on the motherboard to prevent
thermal monitoring problems.
IMPORTANT
Chassis Fan 2 Chassis Fan 1 CPU Blower
Rear View
Front View