Acer Altos R5250 - Manual (Page 60)

3 System upgrade 42
Replacing a system fan
Altos R5250 system includes six dual-rotor easy-swap system fan
modules to provide adequate airflow and keep system running cool.
To replace the system fan:
1 Perform the pre-installation instructions described on page 28.
Warning! The system fan becomes very hot when the
system is on. Allow it to cool off first before handling.
2 Identify the defective fan.
3 Disconnect the system fan cable from the backplane board.
4 Grasp the fan and pull it up and away from the chassis.
5 Install the new fan by sliding the new fan into the chassis.
6 Connect the system fan cable to the fan cable connector on the
backplane board.
7 Observe the post-installation instructions described on page 28.