Replacing A Power Supply Unit - Fujitsu Primergy N800 Manual

System expansions
LED LED
green yellow
(1) (2)
OFF OFF
blinking OFF
ON OFF
OFF ON
ON blinking/
none
latch
ON OFF
Table 25: Power supply unit status monitoring
8.3.1

Replacing a power supply unit

If a power supply unit fails the yellow power supply failure LED on the front panel
turns on. The defective power supply unit can be replaced without turning the
server power off.
V
CAUTION!
Because of chassis airflow disruption, the power supply unit bay should
not be vacant and/or not covered for more than five minutes when server
power is on. Exceeding the five-minute limit may cause damage to
certain drives.
Ê Look at the yellow LED (2) on the back side of the server (see figure 22 on
page 94) to determine which power supply unit is defective.
U41243-J-Z156-1-76
LED Description
yellow
(3)
OFF No AC power.
OFF No AC power; standby outputs on.
OFF DC outputs on. Power supply unit okay.
OFF Power supply unit failure.
OFF Current limit.
blinking/ „Predictive Failure": The power supply unit
latched is about to fail in the near future because
the fan is performing poorly. The power
supply unit should be exchanged as soon
as possible.
Power supply units
95