Oracle EXADATA X6-2, Service Manual

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Troubleshoot Hardware Faults Using the Oracle ILOM Web Interface
36 Oracle Server X6-2 Service Manual • June 2016
Power Supplies (PSUs)
The server power supplies (PSUs) provide the necessary server voltages from the AC power
outlets. If the PSUs are inoperable, unplugged, or disengaged from the internal connectors, the
server cannot power on.
Note -
The reclosable retaining straps shown in the following figure should be used to secure
the power cord connectors to the rear of the power supplies. The reclosable retaining straps
minimize the risk of accidental disconnection.
Action : Check that the AC cables are connected to both PSUs. Check that the PSUs are
operational (the PSU indicator panel should have a lit green AC OK indicator). Ensure that the
PSU is properly installed. A PSU that is not fully engaged with its internal connector does not
have power applied and does not have a lit green AC OK indicator.
Prevention : When a power supply fails, replace it immediately. To ensure redundancy, the
server has two PSUs. This redundant configuration prevents server downtime, or an unexpected
shutdown, due to a failed PSU. The redundancy allows the server to continue to operate if one
of the PSUs fails. However, when a server is being powered by a single PSU, the redundancy
no longer exists, and the risk for downtime or an unexpected shutdown increases. When