Bosch SGV57T23EU - When pressing ON, only the floor lamp blinks ⇐ Bosch

[Palmer]

Good evening!
Dishwasher Bosch SGV57T23EU.
The RCD that powered the dishwasher (also a stove and microwave) suddenly went out.
Now, when you press the power button, the floor red light flashes once a second ( PMM built-in). The indicator on the door does not light up at all, the program buttons, etc.
does not react.
If you press ON/OFF again, it stops blinking. Once again ON/OFF - flashes again. Moreover, regardless of whether the door is open or closed.
I removed the side left wall, lifted the red float lever (responsible for overflowing water inside the PMM) - the pump turned on and all the water that was inside poured out.
I searched everything on the Internet, I don’t even know where to dig(
After all, there are no error codes. I tried all sorts of RESETs - it doesn’t help.
Help, please!

[Palmer]

I checked the heating element, everything is fine with it.