dish washer not rinsing?

Im having trouble with my dishwasher does anyone have a New World. I cant see a model number on it. It may be on the side but its really difficult to get out. Its not the model which has a fault error code and we have lost the instructions.

It seems to be sticking on rinse cycle when turning it on and then stops after a few minutes. Also when we turn it on it continues too beep for about a minute.

Does anyone have experience of this and knows what to do?