Dell PowerEdge R840 EMC Installation and Service Manual - Page 170

Table 50. AC PSU status indicator codes continued, Power Performance EPP label. Mixing PSUs

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Table 50. AC PSU status indicator codes (continued) Power indicator codes Condition condition and unexpected system shutdown. To change from a high output configuration to a low output 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 125. DC PSU status indicator 1. DC PSU status indicator Table 51. DC PSU status indicator codes Power indicator codes Green Blinking amber Not illuminated Blinking green 170 System diagnostics and indicator codes 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.

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Table 50. AC PSU status indicator codes (continued)
Power indicator codes
Condition
condition and unexpected system shutdown. To change
from a high output configuration to a low output
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 125. DC PSU status indicator
1.
DC PSU status indicator
Table 51. 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.
170
System diagnostics and indicator codes