Power supply unit indicator codes
AC and DC PSUs have an illuminated translucent handle that serves as an indicator. The indicator shows if power is present or if
a power fault has occurred.
Figure 190. AC PSU status indicator
1. AC PSU handle
2. Socket
3. Release latch
Table 70. AC and DC PSU status indicator codes
Power indicator codes Condition
Green Indicates that a valid power source is connected to the PSU and the PSU is operational.
Blinking amber Indicates an issue with the PSU.
Not powered on Indicates that the power is not connected to the PSU.
Blinking green Indicates that the firmware of the PSU is being updated. Do not disconnect the power cable
or unplug the PSU when updating firmware.
CAUTION: If firmware update is interrupted, the PSUs will not function.
Blinking green and powers off When hot-plugging a PSU, it blinks green five times at a rate of 4 Hz and powers off. This
indicates a PSU mismatch due 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 power on the system. AC PSUs support both 240 V and 120 V input
voltages except for Titanium PSUs, which support only 240 V. When two identical
PSUs receive different input voltages, they can output different wattage, and
trigger a mismatch. When correcting a PSU mismatch, replace the PSU with
the blinking indicator. Swapping the PSU to make a matched pair can result in
an error condition and an unexpected system shutdown. To change from a high
output configuration to a low output configuration or the opposite way, you must
power off the system.
CAUTION: If two PSUs are used, they must be of the same type and have the
same maximum output power.
Drive indicator codes
The LEDs on the drive carrier indicate the state of each drive. Each drive carrier has two LEDs: an activity LED (green) and a
status LED (bicolor, green, and amber). The activity LED blinks whenever the drive is accessed.
System diagnostics and indicator codes
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