• 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.
• If you are replacing the existing power supply with a new power supply:
– Use Lenovo Capacity Planner to calculate the required power capacity for what is configured for your
server. More information about Lenovo Capacity Planner is available at:
https://datacentersupport.lenovo.com/solutions/lnvo-lcp.
– Ensure that the devices that you are installing are supported. For a list of supported optional devices for
the server, go to:
https://serverproven.lenovo.com.
– Attach the power information label that comes with this option on the existing label near the power
supply.
Figure 130. Example power supply unit label on the top cover
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
Chapter 5. Hardware replacement procedures 137
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