Dell PowerEdge R930 Owner's Manual page 19

Figure 9. AC PSU status indicator
1 AC PSU status indicator or handle
Table 9. Redundant AC PSU status indicator
Convention Power Indicator
Pattern
A Green
B Flashing green
C Flashing green and
turns off
D Flashing amber
Condition
A valid power source is connected to the PSU and the PSU is operational.
When the PSU firmware 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. You must
roll back the PSU firmware by using Dell Lifecycle Controller. For more
information, see Dell Lifecycle Controller User's Guide at Dell.com/idracmanuals.
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.
NOTE: Ensure that both the PSUs are of the same capacity.
NOTE: Mixing PSUs from previous generations of Dell PowerEdge servers can
result in a PSU mismatch condition or failure to turn the system on.
Indicates a problem in the PSU.
CAUTION: When correcting a PSU mismatch, replace only the PSU with the
flashing indicator. Swapping the other 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: AC PSUs support both 220 V and 110 V input voltages with the
exception of Titanium PSUs, which support only 220 V. When two identical
PSUs receive different input voltages, they can output different wattages, and
trigger a mismatch.
About the PowerEdge R930 19