Dell PowerEdge R740xd2 EMC Installation and Service Manual - Page 176
Table 48. DC PSU status indicator codes, DC PSU status indicator
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Figure 147. DC PSU status indicator 1. DC PSU status indicator Table 48. 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 power 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 from a High Output configuration to a Low Output configuration or conversely, you must to power off the system. 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. 176 System diagnostics and indicator codes
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