Replacing a power supply unit

You can replace either of the two hot-swap redundant power supplies in an enclosure. These redundant power supplies operate in parallel, one continuing to power the canister if the other fails.

DANGER

When working on or around the system, observe the following precautions:

Electrical voltage and current from power, telephone, and communication cables are hazardous. To avoid a shock hazard:

If Lenovo supplied a power cord(s), connect power to this unit only with the Lenovo provided power cord. Do not use the Lenovo provided power cord for any other product.
Do not open or service any power supply assembly.
Do not connect or disconnect any cables or perform installation, maintenance, or reconfiguration of this product during an electrical storm.
The product might be equipped with multiple power cords. To remove all hazardous voltages, disconnect all power cords.
Connect all power cords to a properly wired and grounded electrical outlet. Ensure that the outlet supplies proper voltage and phase rotation according to the system rating plate.
Connect any equipment that will be attached to this product to properly wired outlets.
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.
Disconnect the attached power cords, telecommunications systems, networks, and modems before you open the device covers, unless instructed otherwise in the installation and configuration procedures.
Connect and disconnect cables as described in the following procedures when installing, moving, or opening covers on this product or attached devices.
To disconnect:
1. Turn off everything (unless instructed otherwise).
2. Remove the power cords from the outlets.
3. Remove the signal cables from the connectors.
4. Remove all cables from the devices.
To connect:
1. Turn off everything (unless instructed otherwise).
2. Attach all cables to the devices.
3. Attach the signal cables to the connectors.
4. Attach the power cords to the outlets.
5. Turn on the devices.
Sharp edges, corners and joints might be present in and around the system. Use care when handling equipment to avoid cuts, scrapes and pinching. (D005)

Attention:

Even though many of these components are hot-swappable, they are intended to be used only when your system is not active (no I/O operations). If your system is powered on and processing I/O operations, go to the management GUI and follow the fix procedures. Initiating the replacement actions without the assistance of the fix procedures can result in loss of data or loss of access to data.

Be careful when you are replacing the hardware components that are located in the back of the system that you do not inadvertently disturb or remove any cables that you are not instructed to remove.

Ensure that you are aware of the procedures for handling static-sensitive devices before you replace the power supply.

Attention: Do not remove a power supply unit from an active enclosure until a replacement power supply unit is ready to be installed. While a power supply unit is not installed, airflow through the enclosure is reduced and the enclosure can overheat. It is recommended that a replacement power supply is fitted within 5 minutes of replacing a faulty unit. Ensure that you have read and understood these instructions, and have the replacement available and unpacked before you remove the existing power supply.

To replace the power supply, perform the following steps:

Read the safety information in Preparing to remove and replace parts.
Confirm that you know which power supply needs to be replaced. Go to Procedure: Identifying which enclosure or canister to service.
Disconnect the power cord from the electrical outlet and the power supply that you are replacing.
On the left side of the power supply, press the orange release tab to the right just enough to release the handle (no more than 6 mm [0.25 in.]) as you rotate the handle downward.
Using the handle, gently slide the power supply out of the enclosure.
Figure 1. Removing the power supply unit from the left side of the enclosure
Hold the new power supply so that the handle is fully extended.
Gently slide the power supply into the enclosure until it stops. Rotate the handle upward into the closed position until it clicks.
Connect the power cord to the power supply and to a properly grounded electrical outlet.
Note: After the power cord is connected to the electrical outlet, make sure that the AC power (green) LEDs are lit and the fault (amber) LED is off.