Flahing lights on Hotpoint FDL 570p?

I have a hotpoint fld 570p Dishwasher and it stopped halfway through a program(the residual water was dirty) the salt, rinseaid,washing and drying lights were all flashing. I unpluged the unit and waited 5 minutes and restarted the program, after a few minutes the same thing occured. I removed all the water by hand, refilled the salt, checked both the inlet and outlet pipes were clear and restarted with the unit empty, it filled with clean water which started to heat as it was temid when after about 15 minutes it stopped again ( it had not reached the point in the program where the tablet is released)?