Dell EMC DSS8440 - Page 18

Convention Power indicator
pattern
Condition
C Flashing green and
turns o.
When hot-adding a PSU, the PSU handle ashes green ve times at 4 Hz rate and turns
o. This indicates a PSU mismatch with respect to eciency, feature set, health status,
and supported voltage.
CAUTION: If four PSU are installed, the four PSUs must have the same type of
label; for example, Extended Power Performance (EPP) label. Mixing PSU from
previous generations of PowerEdge servers is not supported, even if the PSU
has 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 PSU with the blinking
indicator. Swapping the PSU to make matched pair can result in an error
condition and unexpected system shutdown. To change from a high output
conguration to a low output conguration or vice versa, you must turn o the
system
CAUTION: The 120 V AC PSU is not recommended for this system. Operating at
120 V AC results in the 2400W PSU de-rating to only 1400W, which can aect
power redundancy policy and possibly system throttling.
CAUTION: If four PSUs are used, they must be of the same type and have the
same maximum output power.
D Flashing amber Indicates a problem with the PSU.
E Not illuminated Power is not connected to the PSU.
18 Technical specications