What do the different indicator lights mean on the Opal Ice Maker?

The 'Power' indicator shows the unit is on, the 'Making Ice' indicator signals ice production is active, the 'Cleaning' indicator lights up during the cleaning cycle, the 'Defrosting' indicator shows the unit is defrosting (do not unplug during this process), and the 'Add Water' indicator means the water reservoir is empty or below the minimum fill line and needs to be refilled.