Fan Modules - Cisco Firepower 4100 Series Hardware Installation Manual

Fan Modules

Table 9: Power Supply Module LEDs
No power to all power supplies
Power supply module failure
Includes over voltage, over current, over temperature,
and fan failure
Power supply module warning events
Power supply continues to operate (high temperature,
high power, and slow fan)
Power is present.
3.3 VSB on (power supply module off)
Power supply module is OK and on.

Fan Modules

The Firepower 4100 requires six fan modules, which are hot-swappable. They are installed in the rear of the
chassis. The system supports operation with a single fan failure (N+1 fan redundancy), but do not run the
system for an extended amount of time without all fan modules installed. Keep removal and replacement time
at 3 minutes. Remove and replace one fan module at a time.
If you remove a fan or a fan fails, the other fans operate at full speed, which can be noisy.
The fan modules are numbered left to right, for example, FAN1, FAN2, FAN3, FAN4, FAN5, and FAN6.
See Remove and Replace the Fan Module, on page 58
module.
The following figure shows the location of the fan LED.
Figure 14: Fan LED
Cisco Firepower 4110, 4120, 4140, and 4150 Hardware Installation Guide
20
Amber LED (Fail Green LED (OK Status)
Status)
Off Off
On Off
1 Hz flashing Off
Off 1 Hz flashing
Off On
for the procedure for removing and replacing the fan
Overview