Indesit Dif14

Hello everybody,
first of all sorry for my english, I’m Italian, hope I’ll explain clearly what’s happening here.

I own a dishwasher Indesit Mod. DIF14 S/N00625 0737 (COD.37490220900).

It has this problem: it starts, then start loading the water (and it gets in the dishwasher) then, when it should take steps to washing, makes the beep and download all the water.
When I open it I find that first (intensive) and third (soak)washcycle indicator lights (pic attached) are flashing quickly simultaneously.

It happens:
– always if I use the forth program (eco)
– never if I use third program (soak)
– often with first (intensive) and second (normal)

Unfortunately can’t find anywhere what that error message means.

May someone please help help me with this?

thx in advance for your help

cheers Monia