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Remove a hot-swap power supply unit

Use this information to remove a power supply unit.

About this task

  • If the power supply unit to be removed is the only one installed, the power supply is non-hot-swap and before removing it, you must turn off the server first. To support redundancy mode or hot-swap, install an additional hot-swap power supply.

  • You don’t need to set the power redundancy mode yourself. The BMC of the server can automatically set it based on the installed power supply unit quantity.

    • When only 1 power supply unit is installed, the redundancy mode is set to Non-redundant mode.

    • When 2 power supply units are installed, the redundancy mode is set to Redundant N+N. If one of the power supply units fails or has been removed, the BMC will report an event and set the redundancy mode to Non-redundant mode automatically.

  • Read Installation Guidelines to ensure that you work safely.

  • Prevent exposure to static electricity, which might lead to system halt and loss of data, by keeping static-sensitive components in their static-protective packages until installation, and handling these devices with an electrostatic-discharge wrist strap or other grounding system.


  1. If the server is in a rack, adjust the cable management arm (CMA) to gain access to the power supply bay.
    Figure 1. CMA adjustment
    Adjusting the CMA to get access to the power supply

    1. Press down the stop bracket 1 and rotate it to the open position.

    2. Rotate the CMA out of the way to gain access to the power supply.

  2. Disconnect the power cord from the hot-swap power supply and the electrical outlet.
    • For 240 V DC power supply units, turn off the server, then, disconnect both ends of the power cord and keep it in an ESD-safe place.

    • For AC power supply units, disconnect both ends of the power cord and keep it in an ESD-safe place.

    • For –48V DC power supply units:

      1. Disconnect the power cords from the electrical outlet.

      2. Use a slotted screwdriver to loosen the captive screws on the power supply terminal block.

      3. Disconnect the power cords from the power supply unit and keep them in an ESD-safe place.

    If you are replacing two power supplies, replace them one by one to ensure that the power supply to the server is not interrupted. Do not disconnect the power cord from the secondly replaced power supply until the power output LED for the firstly replaced power supply is lit. For the location of the power output LED, refer to Rear view LEDs.
  3. Press the release tab toward the handle and carefully pull the handle at the same time to slide the hot-swap power supply out of the chassis.
    Figure 2. Hot-swap power supply removal
    Hot-swap power supply removal

After you finish

  1. Install a new power supply or install the power-supply filler to cover the power supply bay. See Install a hot-swap power supply unit.

    To ensure proper cooling during normal server operation, both of the power supply bays must be occupied. This means that each bay must have a power supply installed; or one has a power supply installed and the other has a power supply filler installed.
  2. If you are instructed to return the old hot-swap power supply, follow all packaging instructions and use any packaging materials that are provided.

Demo video

Watch the procedure for YouTube