Hi. I too have an IDL500. Sometimes when it and the washing machine is running it will trip. It's always during the day -on a weekend. I think it is just when there is a big demand for electric. I think anyway - I live in a block of flatted appartments. I just let the water in a dishwasher cool and after an hour, switch it back on and it's fine. Happens 2 or 3 times a year here. Not sure if that is helpful at all.
STEPHEN MAC, May 2011
