Remove a 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 unit is not hot-swappable. Before removing it, you must turn off the server first. To support redundancy mode or hot-swap, install an additional hot-swap power supply unit.

Safety information for AC power supplies

S035

CAUTION

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.

S002

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.

S001

DANGER

danger

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.

Safety information for DC power supplies

CAUTION

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.

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

S035

CAUTION

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.

S019

CAUTION

The power-control button on the device does not turn off the electrical current supplied to the device. The device also might have more than one connection to dc power. To remove all electrical current from the device, ensure that all connections to dc power are disconnected at the dc power input terminals.

S029

DANGER

danger

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:

Turn OFF subject dc power source(s) and equipment(s) that are attached to this product. Install the power supply unit(s) into the system housing. 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. Connect dc power cord(s) to subject power source(s). Turn ON all the power source(s).

Disconnect or turn off the subject dc power source(s) (at the breaker panel) before removing the power supply unit(s). Remove the subject dc cord(s) and make sure the wire terminal of power cord(s) is insulated. Unplug the subject power supply unit(s) from the system housing.

Attention

• 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.

Watch the procedure

• A video of this procedure is available at YouTube.

Procedure

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
   
   

   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.

   • For 240 V DC power supply units, turn off the server, and 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, make the wire terminal insulated, and keep them in an ESD-safe place.

   Note

   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 LEDs on the power supply unit.
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