How can I get rid of soap suds in my dishwasher?

I have a 2 drawer Delonghi dishwasher which was ex-display & came with no manual. I loaded it up this morning with some very greasy bbq shelves & thought I'd help it along a bit with a liberal squirt of washing up liquid as well as a couple of dishwash tabs. Half an hour into the cycle it started bleeping & flashing with an F1 error message, which I believe is due to the amount of soap suds in the machine! How can I get it fixed before my husband comes home!!!