Dell DSS 1510 Owner's Manual page 16

Figure 8. AC PSU status indicator
1. AC PSU status indicator/handle
Figure 9. AC PSU status indicator
1. AC PSU status indicator/handle
Table 8. AC PSU status indicator
Convention Power Indicator
Pattern
A Green
B Flashing green
C Flashes green and
turns off
16 Dell DSS 1510 system overview
Description
A valid power source is connected to the PSU and the PSU is operational.
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.
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.