Lenovo x3550 M4 Installation And Service Manual page 280

Figure 167. Power supply removal
Results
If you are instructed to return the power supply, follow all packaging instructions,
and use any packaging materials for shipping that are supplied to you.
Removing a hot-swap dc power supply:
Use this information to remove a hot-swap dc power supply.
About this task
When you remove or install a hot-swap dc power supply, observe the following
precautions.
Statement 29
CAUTION: This equipment is designed to permit the connection of the earthed
conductor of the dc supply circuit to the earthing conductor at the equipment.
This equipment is designed to permit the connection of the earthed conductor of
the dc supply circuit to the earthing conductor at the equipment. If this connection
is made, all of the following conditions must be met:
v This equipment shall be connected directly to the dc supply system earthing
v This equipment shall be located in the same immediate area (such as, adjacent
v The dc supply source shall be located within the same premises as this
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System x3550 M4 Type 7914: Installation and Service Guide
electrode conductor or to a bonding jumper from an earthing terminal bar or
bus to which the dc supply system earthing electrode conductor is connected.
cabinets) as any other equipment that has a connection between the earthed
conductor of the same dc supply circuit and the earthing conductor, and also the
point of earthing of the dc system. The dc system shall not be earthed elsewhere.
equipment.