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Power supply unit indicator codes
Each AC power supply unit (PSU) has an illuminated translucent handle and each DC PSU (when
available) has an LED that serves as an indicator to show whether power is present or a power fault has
occurred.
Figure 11. AC PSU status indicator
1. AC PSU status indicator/handle
Convention Power indicator
pattern
Condition
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.
C Flashing 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. Replace the PSU with a PSU that matches the capacity of
the other PSU.
CAUTION: For AC PSUs, use only PSUs with the Extended
Power Performance (EPP) label on the back. Mixing PSUs from
previous generations of Dell PowerEdge servers can result in a
PSU mismatch condition or failure to power on.
D Flashing amber Indicates a problem with the PSU.
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