Figure 49: HVDC Power Feeds
Power feed for PSU-12Power feed for PSU-21
Step 5 Set the HVDC disconnect switch in the circuit to ON.
In a system with multiple power supplies, connect each power supply to a separate HVDC power source. In
the event of a power source failure, if the second source is still available, it can maintain system operation.
Caution
Step 6 Verify power supply operation by checking the power supply LED on the front of the chassis.
See Power Supply Modules, on page 26 for the LED values.
Remove and Replace the Fan Module
You can remove and replace fan modules while the system is running. The airflow moves from front to back.
See Fan Modules, on page 28 for more information about the fan module.
Cisco Firepower 9300 Hardware Installation Guide
75
Installation, Maintenance, and Upgrade
Remove and Replace the Fan Module
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