Since my heating and hot water system was replaced my dishwasher has stoppe?

we have a bosch dishwasher and has stopped working since we upgraded our heating and hot water system with a pressurised tank and a new boiler.

No water comes in and the machine stops after a 30 secs. I have checked water supply and the filter at the water inlet side.
I feel it has to be something simple but do not want to open up any other bits