Dell PE R720XD Owner's Manual page 19

Figure 10. AC Power Supply Status Indicator
1. AC power supply status indicator/handle
Figure 11. DC Power Supply Status Indicator
1. DC power supply status indicator
Power Condition
Indicator
Pattern
Not lit Power is not connected.
Green The handle/LED indicator lights green indicating that a valid power source is connected to the power
supply and that the power supply is operational.
Flashing Indicates a problem with the power supply.
amber
CAUTION: When correcting a power supply mismatch, replace only the power supply with the
flashing indicator. Swapping the opposite power supply 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 power down the system.
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