Table 14. AC PSU status indicator codes (continued)
Power indicator codes
Condition
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.
DC PSU status indicator
1. DC PSU status indicator
Table 15. DC PSU status indicator codes
Power indicator codes
Condition
Green
A valid power source is connected to the PSU and the PSU is operational.
Blinking amber
Indicates a problem with the PSU.
Not illuminated
Power is not connected to the PSU.
Blinking green
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 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.
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.
22
Dell EMC PowerEdge R640 overview
