Ac Power Connection - Oracle Sun Server X4-4 Service Manual

Troubleshoot Hardware Faults

AC Power Connection

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 (see
Server
a two-CPU configured server can operate at either 100-127 VAC or 200-240 VAC. For more
information about the processor subsystem, see
Action: Check that both AC power cords are connected to the server and check that the correct
power is present at the outlets . If necessary, monitor the power to verify that it is within
the acceptable range. You can verify proper connection and operation of a power supply
by checking its indicator panel. Lit green AC OK and DC OK indicators show a properly
functioning PSU. An amber AC OK indicator indicates that the AC power to the PSU is
insufficient.
Prevention: Use the AC power cord 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.
52 Sun Server X4-4 Service Manual • October 2015
Specifications). A four-CPU configured server needs to operate at 200-240 VAC, while
"Processor Subsystem" on page 23.