Each AC power
supply unit (PSU) has an illuminated translucent handle and each DC
power supply unit (when available) has an LED that serves as an indicator
to show whether power is present or a power fault has occurred. Figure 1. AC power supply
unit status indicator
AC power supply unit status indicator/handle
Table 1. Power indicatorpower indicator
Convention
Power
indicator pattern
Condition
A
Green
The handle
indicator lights green indicating that a valid power source is connected
to the power supply unit and that the power supply unit is operational.
B
Flashing green
When updating
the firmware of the power supply unit, the power supply unit handle
flashes green.
C
Flashing green and turns off
When hot-adding
a power supply unit (PSU), the power supply unit handle flashes green
five times at 4 Hz rate and turns off. This indicates that the power
supply unit is mismatched with the other power supply unit (in terms
of efficiency, feature set, health status, and supported voltage).
Replace the power supply unit that has the flashing indicator with
a power supply unit that matches the capacity of the other installed
power supply unit.
NOTE:For AC power supplies, use only PSUs with the Extended Power Performance
(EPP) label on the back. Mixing PSUs from previous generations of
servers can result in a PSU mismatch condition or failure to power
on.
D
Flashing amber
Indicates
a problem with the power supply unit.
CAUTION:When
correcting a power supply unit mismatch, replace only the power supply
unit with the flashing indicator. Swapping the opposite power supply
unit to make a matched pair can result in an error condition and unexpected
system shutdown. To change from a High Output configuration to a Low
Output configuration or vice versa, you must power down the system.
CAUTION:AC power supplies support both 220 V and 110 V input voltages with
the exception of Titanium power supplies, which support only 220 V.
When two identical power supplies receive different input voltages,
they can output different wattages, and trigger a mismatch.
CAUTION:If two power supplies are used, they must be of the same type and
have the same maximum output power.
CAUTION:Combining
AC and DC power supplies is not supported and triggers a mismatch.
E
Not lit
Power
is not connected.
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