What do the different LED color indicators mean during charging?

Blinking Green indicates charging in Bulk or Absorption stage (the number of blinks shows how far below the Absorption Voltage the battery is). Solid Green means Float stage charging. Solid Orange indicates Equalization stage. Solid Red shows a fault condition (over current, low DC voltage, or operating temperature below 0°C). Blinking Red indicates over-temperature fault. (Page 34)