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Remove a power supply unit

Follow the instructions in this section to remove a power supply unit.

About this task

shock hazard
Electrical current from power, telephone, and communication cables is hazardous.

To avoid a shock hazard:

  • Connect all power cords to a properly wired and grounded electrical outlet/source.
  • Connect any equipment that will be attached to this product to properly wired outlets/sources.
  • When possible, use one hand only to connect or disconnect signal cables.
  • Never turn on any equipment when there is evidence of fire, water, or structural damage.
  • The device 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.
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.
240VA shock hazard

Hazardous energy present. Voltages with hazardous energy might cause heating when shorted with metal, which might result in spattered metal, burns, or both.

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.

  • Read Installation Guidelines and Safety inspection checklist 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.

The following tips describe the information that must be considered for the removal of a power supply with dc input.
  1. 240 V dc input (input range: 180-300 V dc) is ONLY supported in Chinese Mainland.

  2. Power supplies with 240 V dc are not hot-swappable. To remove the power cord, ensure you have turned off the server or disconnected the dc power sources at the breaker panel.

  3. In order for the ThinkSystem products to operate error free in both a DC or AC electrical environment, a TN-S earthing system which complies to 60364-1 IEC 2005 standard has to be present or installed.

Figure 1. Power supply unit label
Power supply unit label
This type of power supply unit is hot-swap only when two power supplies are installed for redundancy. If only one power supply unit is installed, you must power off the server first before removing the power supply.

240 V dc warning statement


NEVER CONNECT AND DISCONNECT THE POWER SUPPLY CABLE AND EQUIPMENT WHILE YOUR EQUIPMENT IS POWERED ON WITH DC SUPPLY (hot-plugging). Otherwise the equipment and result in data loss may be damaged, the damages and losses result from incorrect operation of the equipment will not be covered by the manufacturers’ warranty.


  1. Locate the power supply unit on the rear of the server; then, disconnect the power cord from the power supply unit.
  2. Remove the power supply unit.
    1. Press and hold the release tab in the direction as shown.
    2. At the same time, carefully pull the handle to slide the power supply unit out of the chassis.
      Figure 2. Removal of a power supply unit or PSU filler
      Power supply unit removal

After this task is completed

  1. Install a replacement unit or filler, see Install a power supply unit.

    To ensure proper cooling during normal server operation, both of the power supply bays must be occupied either with a power supply unit or a PSU filler.
  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.