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Water leak problems

Use this information to resolve water leak problems with the Processor Neptune® Core Module.

If the water is observed outside of the chassis, make sure the power supplies have been disconnected. If no water is observed outside of the chassis, but there is a suspicion of a water leak in the chassis, complete the following steps to determine the source of the leak. The water loop is equipped with leakage sensor to assist in detecting any water leaks.
Note
A small leak may not be detected by leakage sensor, so visual confirmation might be necessary.

Suspicious leakage symptoms​

The following situations might occur due to leakage problems:

  • Processor over temperature error indicated by the System Error "!" LED being solid ON at the front of the server

  • The green LED on the leakage sensor will remain solid when there’s no leakage and will blink at 1 Hz if a leak is detected

  • A Lenovo XClarity Controller event may report the following event:

    • FQXSPUN0019M: Sensor Liquid Leak has transitioned to critical from a less severe state. This event indicates there could be leakage detected.

  • If the "leak detect" persists, the affected water loop will need to be replaced

Complete the following steps in order until you are able to isolate the cause of the potential leak:

  1. Check Lenovo XClarity Controller messages to see if any leakage warnings have been reported. See XClarity Controller events for more information.

  2. Remove the node from the chassis, and place it on a stable work surface. See Remove a node from the chassis.

  3. Locate the water loop indicated by the message.

  4. Use a flashlight to visually inspect the system board for any moisture.

  5. Check the water loop for any moisture.

  6. If you identify the problem in the steps above, replace the water loop (see Remove the Lenovo Processor Neptune® Core Module).
    Note
    It is important to visually inspect the bottom of the chassis with a flashlight prior to installing the Processor Neptune® Core Module into the chassis.

  7. After replacing the water loop, run AC cycle and check if the event has been deasserted.

  8. If you are unable to identify the problem, run AC cycle and check if the issue still exist. Contact Product Engineer for the further assistance.