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Remove a hot-swap power supply unit

Follow instructions in this section to remove a hot-swap power supply unit.

disconnect all power
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.

For -48V dc power supply, electrical current from power cords is hazardous.

To avoid a shock hazard:

  • To connect or disconnect -48V dc power cords when you need to remove/install redundancy power supply unit(s).
To Connect:To Disconnect:
  1. Turn OFF subject dc power source(s) and equipment(s) that are attached to this product.
  2. Install the power supply unit(s) into the system housing.
  3. Attach dc power cord(s) to the product.
    • Ensure correct polarity of -48 V dc connections: RTN is + and -Vin (typical -48 V) dc is -. Earth ground should be connected very well.
  4. Connect dc power cord(s) to subject power source(s).
  5. Turn ON all the power source(s).
  1. Disconnect or turn off the subject dc power source(s) (at the breaker panel) before removing the power supply unit(s).
  2. Remove the subject dc cord(s) and make sure the wire terminal of power cord(s) is insulated.
  3. Unplug the subject power supply unit(s) from the system housing.
shock hazard

Never remove the cover on a power supply or any part that has this label attached. 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.

About this task

Read Installation Guidelines and Safety inspection checklist to ensure that you work safely.
  • 240 V dc input (input range: 180-300 V dc) is supported in Chinese Mainland ONLY.
  • Power supply with 240 V dc input cannot support hot-plugging power cord function. Before removing the power supply with dc input, please turn off server or disconnect dc power sources at the breaker panel or by turning off the power source. Then, remove the power cord.


  1. Disconnect both ends of the power cord and keep it in an ESD-safe place.
  2. Remove the power supply unit.
    1. Press and hold the orange release tab.
    2. Grasp the handle, and pull the power supply unit out of the server.
      Figure 1. Power supply unit removal
      • A CFFv4 power supply is used as an example for illustration. The replacement procedure for CRPS power supply is similar.
      • The color of the CRPS handle might be different from the illustration.

      Power supply unit removal

After you finish

  1. Install a power supply as soon as possible. See Install a hot-swap power supply unit.
  2. If you are instructed to return the component or optional device, follow all packaging instructions, and use any packaging materials for shipping that are supplied to you.

Demo video

Watch the procedure on YouTube