Oracle Exadata Storage Server X7-2 EF Service Manual page 38

Troubleshoot Hardware Faults Using the Oracle ILOM Web Interface
Power Issue
AC Power
Connection
Power
Supplies
(PSUs)
Top Cover
38 Oracle Exadata Storage Server X7-2 EF and HC Service Manual • May 2018
Description
The AC power cords are the
direct connection between the
server power supplies and the
power sources. The server
power supplies need separate
stable AC circuits. Insufficient
voltage levels or fluctuations
in power can cause server
power problems. The power
supplies are designed to
operate at a particular voltage
and within an acceptable range
of voltage fluctuations (refer to
"Electrical Requirements" in
Oracle Servers X7-2 and X7-
2L Installation GuideOracle
Exadata Storage Server
X7-2 EF and HC Installation
Guide).
The server power supply
units (PSUs) provide the
necessary server voltages from
the AC power outlets. If the
power supplies are inoperable,
unplugged, or disengaged from
the internal connectors, the
server cannot power on.
Note - Use the Velcro straps
on the back of the server
to secure the power cord
connectors to the back of
the power supplies. The
Velcro retaining straps
minimize the risk of accidental
disconnection.
The server top cover maintains
the air pressures inside the
server, prevents accidental
exposure to hazardous
voltages, and protects internal
components from physical and
environmental damage.
Action
Verify that both AC power
cords are connected to the
server. Verify that the correct
power is present at the outlets
and monitor the power to
verify that it is within the
acceptable range. You can
verify proper connection and
operation by verifying the
power supply (PS) indicator
panels, which are located at
the back of the server on the
power supplies. Lit green
AC OK indicators show a
properly functioning power
supply. An amber AC OK
indicator indicates that the AC
power to the power supply is
insufficient.
Verify that the AC cables
are connected to both power
supplies. Verify that the power
supplies are operational (the
PSU indicator panel must have
a lit green AC OK indicator).
Ensure that the power supply
is properly installed. A power
supply that is not fully engaged
with its internal connector does
not have power applied and
does not have a lit green AC
OK indicator.
Do not operate the server
without the top cover
installed unless you are
hot-plugging a fan module,
and then ensure that you
complete the operation and
replace the cover within 20
seconds. For instructions
for properly replacing fan
Prevention
Use the AC power cord Velcro
retaining clips and position
the cords to minimize the risk
of accidental disconnection.
Ensure that the AC circuits that
supply power to the server are
stable and not overburdened.
When a power supply fails,
replace it immediately. To
ensure redundancy, the server
has two power supplies. This
redundant configuration
prevents server downtime,
or an unexpected shutdown,
due to a failed power supply.
The redundancy allows the
server to continue to operate
if one of the power supplies
fails. However, when a
server is being powered by
a single power supply, the
redundancy no longer exists,
and the risk for downtime
or an unexpected shutdown
increases. When installing a
power supply, ensure that it is
fully seated and engaged with
its connector inside the drive
bay. A properly installed power
supply has a lit green AC OK
indicator.
Be careful to avoid bending
or otherwise warping the top
cover.