Lenovo ThinkSystem SD550 V3 User Manual page 74

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.
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.
CAUTION:
High touch current. Connect to earth before connecting to supply.
Attention:
• Read "Installation Guidelines" on page 43
you work safely.
• The following notes describe the type of power supply that the chassis supports and other information
that you must consider when installing a power supply:
– For redundancy support, an additional hot-swap power supply must be installed, if one is not installed
in the chassis.
– Make sure that the devices that you are installing are supported. For a list of supported optional
devices for the chassis, see
Procedure
Step 1. Make preparations for this task.
a. Make sure that the power supply unit to be installed is of the same wattage and same vendor
(for CRPS models) as the installed ones. Otherwise, complete the following steps:
1. Power off the node; then, disconnect the power cords.
ThinkSystem SD550 V3 User Guide
64
and "Safety inspection checklist" on page 44
https://serverproven.lenovo.com .
to make sure that