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Each power supply module has three status LEDs. These are located next to the input connector, as
shown by the following figure.
Location
Purpose
A (left)
Power Good LED
(green)
B (center)
Fault LED (amber)
C (right)
AC OK LED (green)
NOTE
Proper system cooling requires that a power supply be installed in each
power supply bay at all times.
Intel® Server Platforms SR4850HW4 & SR4850HW4/M Product Guide
A
B
C
Description
This green LED is driven by internal circuitry and is lit whenever the
power is turned on.
This amber LED is driven by internal circuitry and is lit when a power
rail has failed. The LED is lit even if the power supply is in a latched
state. The only time (during a fault) when it is not lit is if the +3.3VSB is
lost.
The LED is not lit when the power supply is turned off by powering
down the platform.
This green LED is driven by internal circuitry and is lit whenever the AC
power cord is plugged in to an active AC power source.
Figure 6. Power Supply Indicators
TP01402
41
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Troubleshooting
