LG Dishwasher. My LG Dishwasher Model: LD 14AW2 Electronic stand alone keeps on coming up with an

Question

My LG Dishwasher Model: LD 14AW2 Electronic stand alone keeps on coming up with an error E1? I am not sure what it is because we have no instruction manual. The dishwasher is about 2 1/2 years old. I am doing a standard (Normal) wash. It starts to put the water in side then comes up with the error.