We have a two year old dishwasher that stops working at the drain cycle. First the 4 and 6 hour delay lights go on, then they go out, the dishwasher shuts down and the red light above Normal Wash blinks rapidly. I suspect that, because this occurs at the drain cycle, that the machine needs to be cleaned. If I disconnect the power and wait a few minutes and plug it back in, I can then press the Cancel/Drain button twice and the machine drains, but soon returns to the red blinking light over the Normal Wash button. We bought the machine used and so, no manual. Questions: Where can I download a manual? And how do I clean the machine?

Thanks, in advance for any help.