How to troubleshoot the below alarm log observed for PSU on any member of VC or on standalone switch :

Major FPC X PSU Y Output Failure

• Below chassis alarm is observed during the issue state on switch :

root@Core> show chassis alarms no-forwarding

1 alarms currently active

Alarm time        Class Description

20XX-0X-0X XX:XX:XX EDT Major FPC 0 PSU 1 Output Failure

MESSAGE LOGS :

May X XX:XX:XX.995 2023 Core alarmd[2034]: %DAEMON-4: Alarm set: Pwr supply id=1694564356, color=RED, class=CHASSIS, reason=FPC 0 PSU 1 Output Failure

CHASSISD LOGS :

May X XX:XX:XX send: red alarm set, device Power Supply 1, reason FPC 0 PSU 1 Output Failure

Please follow the steps below to overcome the error :

• Verify the chassis environment to check the power supply status:

root@Core> show chassis environment no-forwarding

Class Item              Status   Measurement

Power FPC 0 Power Supply 0      OK

    FPC 0 Power Supply 1      Failed

• Verify if PEM is detected on chassis:

root@Core> show chassis hardware

<snip>

Power Supply 0 REV 04 740-046876 xx JPSU-350-AC-AFI-A

Power Supply 1 REV 04 740-046876 xx JPSU-350-AC-AFI-A

<snip>

Resolution Steps :

 

• Try power draining the device to rule out transient hardware issue on the chassis.

• Reseat the PEM, while re-seating, have you tried cleaning it and verified the status?

• Also verify the external power source for the device and ensure there are no issues in the power/environment of the device.

• If the above does not work, perform a spare test - Replace the PEM with another spare working PEM and check if that comes up without error. If yes, then we can conclude that the issue lies with the PEM. If not, then it is most likely that the issue is with the PEM slot and we need to process the RMA accordingly.