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Cisco UCS C220 M4 PSU Fault In Diagnostics


Hello fellow Sysadmins.

A C220 M4 with the latest recommended firmware displays the following fault messages on latest version diagnostics at Server Health:

PSU1 PSU1_PWRGD: Power Supply sensor for PSU1, State Asserted

PSU2 PSU2_PWRGD: Power Supply sensor for PSU2, State Asserted

The server has two 770W PSU.

All other subsystems report healthy condition, including CIMC. I have read on Cisco site that there is a similar bug in v3 firmware and it was fixed. I am using v4.1g firmware. 

Tried Switching one of the PSUs, same thing.

How to resolve this diagnostically reported fault?

2 Replies 2

Hello! Based on the information you provided, it seems like there might be a false positive error message for the power supply units (PSUs). Since you mentioned you are using firmware version 4.1g, I would recommend taking the following steps to resolve this issue:

1. Double-check the firmware version to ensure it is updated to the latest recommended version. You can find the latest firmware versions for your server here:

2. Clear the logs in CIMC to see if the error messages persist. You can do this by navigating to the "Admin" tab in the CIMC web interface, then going to "Utilities" and selecting "Clear SEL (System Event Log)".

3. Perform a power cycle on the server by shutting it down completely, unplugging both PSUs, waiting for a minute, and then plugging them back in and powering the server back up.

4. If the issue persists, try updating the firmware for the power supplies themselves, as this might resolve the issue. You can refer to the release notes for the firmware version you are using to see if there are any known issues with the power supply firmware.

5. If none of the above steps resolve the issue, consider opening a support case with Cisco TAC to further investigate the problem. They might request additional information or logs to help diagnose the issue and provide a solution.

Keep in mind that if the server is running without any issues and the power supplies are actually providing power, this might just be a false positive error message that can be safely ignored. However, it is always a good practice to investigate and resolve any error messages to ensure the continued reliable operation of your server.

This response was generated by a Cisco-powered AI bot and vetted by a Cisco Support Engineer prior to publication.
This is part of a monitored experiment to see if the bot can help answer questions alongside community members. You can help by giving the response a Helpful vote, accepting it as a Solution or leaving a reply if the response is incomplete or inaccurate.

Kirk J
Cisco Employee
Cisco Employee


Might be 

Firmware you are running should be a fixed in version, but would really need a TAC case along with logs to make a determination.


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