System Cooling Fans; Checking A Fan Status Indicator - NEC Express5800 series User Manual

System Cooling Fans

Your system includes four fan modules that can be easily installed or removed
from the side of the system.
Don't remove a fan module while the server is powered on
unless you have a replacement unit available. Once you
remove a fan module from the system, replace it within five
minutes. Vacant spaces alter airflow patterns in the server
system and can cause overheating and damage to system
components

Checking a Fan Status Indicator

Fault LEDs for each fan module are located on the fan board (Figure 4-31). The
LEDs are visible through a cutout in the housing of each module. The red LEDs
light to indicate a fan failure; during normal operation, the LEDs remain unlit. A
fan failure is also indicated by the general system fault LED located on the front
panel.
A Fan Board
4-42 Upgrading Your System
! CAUTION
A
B Fan Status LEDs
Figure 4-31. Fan Status LEDs
B