Siemens SN65M030GB Cycle lasting 2 minutes

I have a new Siemens Dishwasher.

We have used it once, so it has worked, but now when we run a programme it makes a few noises, lasts about a minute, bleeps, lasts another minute, and then finishes.

I have done a programme reset and that isn’t the problem.

I think it might not be getting water into the machine, but the sink is working, and i know it has washed, so there is water getting to the machine.

I have booked an engineer visit, but anything obvious to help & mean no visit would be great.

Thanks