Bosch tankless water heater dripping?

[Nokaoi1]

Just noticed this thing dripping today, anyone know the cause and how to fix it? Here is where it is dripping from:

 

[mike fiore]

not positive but looks like where condensate would come out. look at manual it will show in a diagram what that is. It could also be leaking from inside of unit . take cover off and take a look inside.