How to set up the GS3

Hello Guys
I have a problem with our new GS3 because the water doesn’t goes up going to the water tank and no water is coming out from the group head,do i need adjust something from the inside of the machine?
looking forward in you guys☺️☺️

is there adequate pressure of water feeding into the machine. Should say in the manual what bar pressure you need, or you’ll need a small external pump.