Fuse out

I overhauled my S95 after water damage (steam shut-off valve shot transformer) --> new transformer, new diaphragm regulator, new steam shut-off valve, new seals (it's definitely all in the right place).
Machine in operation, brewing group positioned, then came rinsing, since no water came, the instruction steam press, system fill.
I tried three times, but came nothing - only the punpe was heard. In the hoses a few bubbles circulated, in the hose behind the stop valve nothing at all. I pulled the hose from the membrane regulator to the steam heater, there was some pressure on it and some water flowed out. I put the hose back on and knocked a bit on the stop valve.
After that I connected the machine again to try it again.
It immediately flew out the main fuse (not the socket fuse).
Both heaters are hot.
Bin with my Latin at the end, who can help

Isloation measurement on the heaters, the drainage magnet and the solenoid valve.

Faulty current at the solenoid! Complained and the broken valve reinstalled. Now everything runs again