AC power supply
units (PSUs) have an illuminated translucent handle that serves as
an indicator. The indicator shows
whether power is present or a power fault has occurred. Figure 1. AC PSU status
indicator
AC PSU status indicator/handle
Table 1. AC PSU status
indicatorsThis table describes the AC PSU status indicators
and what condition is the PSU when the power indicator light is green,
flashing green, flashing amber, and when it is not lit.
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.
CAUTION Do not disconnect the power cable or unplug the PSU when updating firmware. if firmware update is interrupted, the PSUs do not function.
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 a PSU mismatch with respect to
efficiency, feature set, health status, and supported voltage.
CAUTION If four PSU are installed, the four PSUs must have the same type of label; for example, Extended Power Performance (EPP) label. Mixing PSU from previous generations of PowerEdge servers is not supported, even if the PSU has same power rating. This results in a PSU mismatch condition or failure to turn the system on.
CAUTION When correcting a PSU mismatch, replace only PSU with the blinking indicator. Swapping the PSU to make 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 The 120 V AC PSU is not recommended for this system. Operating at 120 V AC results in the 2400W PSU de-rating to only 1400W, which can affect power redundancy policy and possibly system throttling.
CAUTION If four PSUs are used, they must be of the same type and have the same maximum output power.
D
Flashing amber
Indicates
a problem with the PSU.
E
Not
illuminated
Power is not connected to the PSU.
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