Figure 8. AC PSU status indicator
1.
AC PSU status indicator/handle
Table 7. AC PSU status indicators
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.
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.
NOTE: Ensure that both the PSUs are of the same capacity.
CAUTION: For AC PSUs, use only PSUs with the Extended Power
Performance (EPP) label on the back.
NOTE: Mixing PSUs from previous generations of Dell PowerEdge servers can
result in a PSU mismatch condition or failure to turn the system on.
D
Flashing amber
Indicates a problem with the PSU.
CAUTION: When correcting a PSU mismatch, replace only the PSU with the
flashing 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: 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.
CAUTION: If two PSUs are used, they must be of the same type and have the
same maximum output power.
18
