Hot-Swapping Power Supplies - NEC Express5800/180Rb-7 User Manual

Do not press on the perforated metal bracket of the carrier
when you push the assembly into the bay. Otherwise you
may damage the metal fingers of the bracket.

Hot-Swapping Power Supplies

Note:
hot-swap a supply. If you have only two supplies installed,
they must occupy the left and center bays (as you face the
back of the server — see Figure 4-4).
When the yellow power supply failure LED on the front panel turns on, you can
determine which power supply is defective by checking the three status LEDs
on the back of each supply. If a power supply fails, the yellow FAIL LED on
the back of the power supply will be on continuously. You must hot-swap the
power supply—remove and replace it—with a good one. If the server contains
three power supplies, you DO NOT need to shut down the server to hot-swap a
failed power supply.
Green PWR (Power) LED—when blinking, AC is applied to the power
!
supply and standby voltages are available. When on continuously, all
power outputs are ready.
Yellow FAIL (Power Supply Failure) LED—when on continuously,
!
the power supply has failed and it must be replaced; when blinking the
power supply current limit has been reached.
Yellow PR_FL (Predictive Failure) LED—when blinking, the power
!
supply is about to fail in the near future because the fan is performing
poorly.
In a fully configured server, the power system contains three 750 watt auto-
ranging power supplies; the third one is redundant. If a single power supply
fails in the redundant power system, the yellow power supply failure LED on
the front panel turns on. You can easily hot-swap the defective power supply
without turning the server power off.
Note:
configurations with three power supplies.
Because of chassis airflow disruption, the power supply bay
should not be vacant for more than five minutes when server
power is on. Exceeding the five-minute limit may cause
damage to certain peripheral components. Before replacing
a power supply in a two-power supply configuration, you
must turn off power to the server.
4-10 Upgrading Your System
CAUTION
You must have three power supplies installed to
Power supplies are hot-swappable only in
WARNING