Diplomat slimline integrated dishwasher stops after 5 mins?

Hi Guys.

Great forum, I’ve searched through trying to find my model type and problem but to no avail.

Its a slimline integrated Diplomat dishwasher fitted about 8 years ago.

I press a program it starts normal, drains water if there’s any, fills up and it then goes into the program wash perfect, however it will stop for no reason after about 3 mins?? .

It has done this before but by starting and stopping, switching the machine off, I somehow managed to get it to work, however today its just not working!!?
I’ve cleaned the arms as there was few bits stuck in it, tried pouring hot water inside it, switched it off for few mins and tried various cycles, each time stopping after few mins?

I’m not sure of my model but it has one red/white push power button on left, and 4 wash cycle leds, with a black programe button on right.

Also inside on the right side there is a blue arrow dial thing that is pointing at no.3 any ideas what this is?

Thanks in advance.