Obviously something is shorting out. Could be any one of many reasons. Anything from a damaged wire touching a metal part of the machine through to shorted out pump, motor, element, inlet valves etc. If you don't have the test equipment to check with or the knowledge of how & where to look then you are better off calling someone in. To try to describe how & what to check via a site like this would be too involved.
Lincoln Appliance NZ, September 2009