Brick Fan Units (Rear View) - Alcatel-Lucent 1200 User Manual

To Perform a Hot Swap of a Fan Unit
Figure 12

Brick Fan Units (Rear View)

While removing and replacing a fan unit, keep in mind that the single fan unit must always
be installed on the left side of the opening for the fan assemblies, and that the dual fan unit
must always be installed on the right side of the opening.
When a fan unit is removed while the Brick is running, a temperature sensor within the
CPU monitoring the internal operating temperature invokes the remaining fan(s) to run at
full speed and generates a visual fan alarm, indicating a missing fan unit. Once the
replacement fan unit is installed, the alarm is cleared and the fans return to normal
operating speed.
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