Dell PowerVault MD3000 - Manual (Page 19)

About Your System
19
Table 1-5. Power Supply/Cooling Fan Module LED Indicators
Type Color Icon Function
DC power Green On: DC output voltages are within specifications.
Off: No power or voltages not within specifications.
Power
supply/cooling fan
fault Amber On: DC output voltages are not within specifications or
one (or both) fans are in fault.
Off: No fault condition is present.
AC power Green On: AC input voltage is within specifications.
Off: No power or voltages not within specifications.