I want to pass along some info about this bosch dishwasher (SHP65TL). I have had a couple of these in the field with beeping issues (may affect more bsh models) during the wash cycle. I wasted over an hour at a house with no help from tech line the first time...The second customer, I called tech line and told them that it was the second one in a week with the issue. He then decided to tell me that they have an issue with their black braided lines breaking down inside and clogging the screen at the valve. He said the exact reason for the beeping is because the circulation pump doesn't feel enough resistance and tells the computer their isn't enough water in the machine.
So at the second house I get off of the phone with tech line, and un install the dishwasher. There was nothing in the screen... I am still at a loss on this as the dishwasher fills eventually and the water pressure in the house is fine... I am going to try to get more info within the next couple days