Dell PowerEdge R840 EMC Technical Specifications - Page 31

Power Performance EPP label. Mixing PSUs from, DC PSU status indicator

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Power indicator codes Condition configuration or conversely, you must turn off the system. CAUTION: 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 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. CAUTION: Combining AC and DC PSUs is not supported and triggers a mismatch. Figure 24. DC PSU status indicator 1. DC PSU status indicator Table 29. DC PSU status indicator codes Power indicator codes Green Blinking amber Not illuminated Blinking green Condition A valid power source is connected to the PSU, and the PSU is operational. Indicates a problem with the PSU. Power is not connected to the PSU. When hot-plugging a PSU, the PSU indicator blinks green. This indicates that there is a PSU mismatch about 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 turn on the system. CAUTION: When correcting a PSU mismatch, replace only the PSU with the blinking indicator. Swapping the PSU to make a matched pair can result in an error condition and unexpected system shutdown. To change System diagnostics and indicator codes 31

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Power indicator codes
Condition
configuration or conversely, you must turn off the
system.
CAUTION:
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 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.
CAUTION:
Combining AC and DC PSUs is not supported
and triggers a mismatch.
Figure 24. DC PSU status indicator
1.
DC PSU status indicator
Table 29. DC PSU status indicator codes
Power indicator codes
Condition
Green
A valid power source is connected to the PSU, and the PSU is
operational.
Blinking amber
Indicates a problem with the PSU.
Not illuminated
Power is not connected to the PSU.
Blinking green
When hot-plugging a PSU, the PSU indicator blinks green. This
indicates that there is a PSU mismatch about 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 turn on the system.
CAUTION:
When correcting a PSU mismatch, replace
only the PSU with the blinking indicator. Swapping the
PSU to make a matched pair can result in an error
condition and unexpected system shutdown. To change
System diagnostics and indicator codes
31