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Installing Field Replaceable Units
The power supplies can work together in Redundant Mode, in which each power supply operates at
approximately 50 percent of its capacity, no greater than 60 percent and no less than 40 percent. If one power
supply fails, the other power supply can provide power for the entire system on its own. This is the default
and recommended mode.
Power supply modules LED
The AC and DC power supply modules except the 1600W AC and DC power supply modules, have the
following LEDs:
• Green indicating the power status
• Amber indicating the power supply failure
Table 13: LEDs on the AC/DC power supply modules
LED
Unlit
Green
Amber
The 1600W AC and DC power supply modules have a bi-color (green/amber) LED to indicate the status of
the power supplies.
Table 14: LEDs on the 1600W AC/DC power supply modules
LED Status
Off
Solid amber
Solid green
1Hz blinking amber
2Hz blinking green
Installation Guidelines
• The switch chassis must be installed in a cabinet or rack that is secured to the data center.
Status
Description
Off
No input power.
Blinking
12V aux output is on; 12V main output is off.
Solid
Both 12V aux output and 12V main output are on;
Power supply is functioning normally.
Blinking
Warning detected.
OR
AC power cord is not inserted properly.
Solid
Critical error detected.
Description
No input power.
Critical error detected; PSU 12V main output is off.
Both 12V aux output and 12V main output are on; Power supply is
functioning normally.
Warning detected; PSU 12V main output is on.
PSU 12V main output is off and 12V aux output is on.
Cisco Catalyst 9500 Series Switches Hardware Installation Guide
Installation Guidelines
61
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Troubleshooting
