IBM System x3550 M4 Installation And Service Manual page 294

v These power supplies are designed for parallel operation. In the event of a
Statement 5
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.
Statement 8
CAUTION:
Never remove the cover on a power supply or any part that has the following
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.
To install a hot-swap ac power supply, complete the following steps:
Procedure
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IBM System x3550 M4 Type 7914: Installation and Service Guide
power-supply failure, the redundant power supply continues to power the
system. The server supports a maximum of two power supplies.
1. Read the safety information that begins on "Safety" on page vii and
"Installation guidelines" on page 33.
2. Touch the static-protective package that contains the hot-swap power supply
to any unpainted metal surface on the server; then, remove the power supply
from the package and place it on a static-protective surface.