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96 Sun Fire 280R Server Owner’s Guide • January 2001
on the back panel). You may connect the second power supply to the same AC
circuit as the first supply. However, for increased system redundancy you should
connect each power supply to a separate circuit.
Removing and replacing a power supply should only be performed by a qualified
service provider. For information about removing and installing power supplies, see
the Sun Fire 280R Server Service Manual.
Power supplies in a redundant configuration feature a hot-swap capability. This
means that you can remove and replace a faulty power supply without turning off
the system power or even shutting down the operating system. If the system is
running on one power supply, you can also add a second supply without
interrupting processing.
Three LED indicators on the front of the power supply display AC and DC status,
and fault conditions. For additional details, see “Power Supply Failure” on page 195.
Note – Sun Fire 280R power supplies shut down automatically in response to
certain over-temperature and power fault conditions. To recover from an automatic
shutdown, you must disconnect the AC power cord, wait roughly 10 seconds, and
then reconnect the power cord.