Dishlex Global 450 dishwasher blowing the circuit breaker?

I have a problem with a dishplex global 450 dishwasher it gets part way through it cycle and then it pops the circuit breaker in the mains switch board. Any ideas, is there anywhere I can find out what is happening at any given part of the cycle? I am wondering whether it is the heating element but don't it would be nice to have more evidence before pulling it apart.

E1a
November 2009