Table 11. AC PSU status indicator
Convention
Power Indicator
Pattern
Description
A
Green
A valid power source is connected to the PSU and the PSU is
operational.
B
Flashing green
When the firmware of the PSU is being updated, the PSU handle
flashes green.
CAUTION: Do not disconnect the power cord or unplug the
PSU when updating firmware. If firmware update is
interrupted, the PSUs will not function. You must roll back the
PSU firmware by using Dell Lifecycle Controller. See
Dell
Lifecycle Controller User’s Guide
at Dell.com/idracmanuals.
C
Flashes green
and turns off
When hot-adding a PSU, the PSU handle flashes green five times at
4 Hz rate and turns off. This indicates that there is a PSU mismatch
with respect to efficiency, feature set, health status, and supported
voltage.
CAUTION: For AC PSUs, use only PSUs with the Extended
Power Performance (EPP) label on the back.
NOTE: Ensure that both the PSUs are of the same capacity.
NOTE: Mixing PSUs from previous generations of Dell
PowerEdge servers can result in a PSU mismatch condition or
failure to turn the system on.
D
Flashing amber
Indicates a problem with the PSU.
CAUTION: When correcting a PSU mismatch, replace only the
PSU with the flashing indicator. Swapping the other PSU 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 turn off the system.
CAUTION: AC PSUs support both 220 V and 110 V input
voltages with the exception of Titanium PSUs, which support
only 220 V. When two identical PSUs receive different input
voltages, they can output different wattages, and trigger a
mismatch.
CAUTION: If two PSUs are used, they must be of the same type
and have the same maximum output power.
CAUTION: Combining AC and DC PSUs is not supported and
triggers a mismatch.
E
Not lit
Power is not connected.
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