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Table 14. AC PSU status indicator codes (continued)
Power indicator codes
Blinking green
Blinking green and turns
off
DC PSU status indicator
1. DC PSU status indicator
Table 15. DC PSU status indicator codes
Power indicator codes
Green
Blinking amber
Not illuminated
Blinking green
22
Dell EMC PowerEdge R640 overview
Condition
When the firmware of the PSU is being updated, the PSU handle blinks green.
CAUTION:
Do not disconnect the power cord or unplug the PSU when updating
firmware. If firmware update is interrupted, the PSUs do not function.
When hot-plugging a PSU, the PSU handle blinks green five times at a rate of 4 Hz and turns off.
This indicates a PSU mismatch with respect to efficiency, feature set, health status, or supported
voltage. If two PSUs are installed, both the PSUs must have the same type of label; for example,
Extended Power Performance (EPP) label. Mixing PSUs from previous generations of PowerEdge
servers is not supported, even if the PSUs have the 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 the PSU with the blinking
indicator. Swapping the 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. AC PSUs
support both 240 V and 120 V input voltages with the exception of Titanium PSUs,
which support only 240 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. Combining AC and DC PSUs is not supported and triggers a
mismatch.
Condition
A valid power source is connected to the PSU and the PSU is operational.
Indicates a problem with the PSU.
Power is not connected to the PSU.
When hot-plugging a PSU, the PSU indicator blinks green. This indicates that there is a PSU
mismatch with respect to efficiency, feature set, health status, or supported voltage.
CAUTION:
If two PSUs are installed, both the PSUs must have the same type of
label; for example, Extended Power Performance (EPP) label. Mixing PSUs from
previous generations of PowerEdge servers is not supported, even if the PSUs
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