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Dell PowerEdge R720 and R720xd Owner's Manual

Power Indicator Codes

Each AC power supply has an illuminated translucent handle and each DC power supply (when available) has an LED that serves as an indicator to show whether power is present or whether a power fault has occurred.
Figure 1. AC Power Supply Status Indicator The figure shows AC power supply status indicator/handle.
  1. AC power supply status indicator/handle
Figure 2. DC Power Supply Status Indicator The figure shows DC power supply status indicator.
  1. DC power supply status indicator
Power Indicator Pattern
Not lit
Power is not connected.
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 amber
Indicates a problem with the power supply.
  • 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.
  • CAUTION: AC power supplies support both 220 V and 110 V input voltages with the exception of Titanium power supplies, which support only 220 V. When two identical power supplies receive different input voltages, they can output different wattages, and trigger a mismatch.
  • CAUTION: If two power supplies are used, they must be of the same type and have the same maximum output power.
  • CAUTION: Combining AC and DC power supplies is not supported and triggers a mismatch.
Flashing green
When hot-adding a power supply, this indicates that the power supply is mismatched with the other power supply (in terms of efficiency, feature set, health status, and supported voltage). Replace the power supply that has the flashing indicator with a power supply that matches the capacity of the other installed power supply.

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