Cisco Firepower 4100 Series Hardware Installation Manual page 67

Maintenance and Upgrades
The system supports operation with a single fan failure (N+1 fan redundancy), but do not run the system
Note
for an extended amount of time without all fan modules installed. Keep removal and replacement time at
3 minutes. Remove and replace 1 fan module at a time.
Step 1
To remove a fan module, face the rear of the chassis, and grasp the handle of the fan module.
Step 2 Squeeze the handle to disengage the latches on the left and right of the fan module.
Step 3 Pull the fan module out of the chassis.
Figure 42: Remove the Fan Module
Step 4
To replace a fan module, hold the fan module in front of the fan slot.
Step 5 Push the fan module into the chassis until it is properly seated and the latches snap into place.
If the system is powered on, listen for the fans. You should immediately hear the fans operating. If you do not hear the
fans, make sure the fan module is inserted completely into the chassis and the faceplate is flush with the outside surface
of the chassis.
Step 6 Verify that the fan is operational by checking the fan module LED. See
of the fan LEDs.
Remove and Replace the Fan Module
Front Panel LEDs, on page 7
Cisco Firepower 4100 Series Hardware Installation Guide
for a description
63