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Replacing a hot-swap power supply

Use this information to replace a hot-swap power supply.

Note

  1. Make sure the devices you are installing are supported. For a list of supported optional devices for the server, see the Lenovo ServerProven website.

  2. Do not install two power supply units with different wattages. Related information is available from the following:

  • Read the label on top cover for maximum wattage output of installed power supply units. Only replace the existing units with those with the same wattage as marked on the label.


    labels that indicate wattage of power supply units

  • Check the rear of the node to make sure there’s no length difference between the two installed units. If there’s visible difference in length, it means the two units come with different wattages, and one of them have to be replaced. Also, error message PSU_Mismatch would appear in this case.


    PSUs of the same/different wattage(s).
Statement 5
Graphic illustrating Safety Statement 5
CAUTION
The power control button on the device and the power switch on the power supply do not turn off the electrical current supplied to the device. The device also might have more than one power cord. To remove all electrical current from the device, ensure that all power cords are disconnected from the power source.

Graphic illustrating power cord disconnection
Statement 8
Graphic illustrating Safety Statement 8
CAUTION
Never remove the cover on a power supply or any part that has the following label attached.
Graphic illustrating Safety Statement 8
Hazardous voltage, current, and energy levels are present inside any component that has this label attached. There are no serviceable parts inside these components. If you suspect a problem with one of these parts, contact a service technician.

Read the safety information in Safety and Installation guidelines.

To replace or install a hot-swap power supply, complete the following steps.

  1. Slide the hot-swap power supply into the bay until the release latch clicks into place.
    Important
    During normal operation, each power-supply bay must contain either a power supply or power-supply filler panel for proper cooling.
    Figure 1. Hot-swap power supply installation
    Hot-swap power supply installation
  2. Connect one end of the power cord for the new power supply into the ac connector on the back of the power supply; then, connect the other end of the power cord into a properly grounded electrical outlet.
  3. If the server is turned off, turn on the server.
  4. Make sure that the ac power LED on the power supply is lit, indicating that the power supply is operating correctly. If the server is turned on, make sure that the dc power LED on the power supply is lit also.