PMM Siemens S9VT1S does not take on water ⇐ Siemens

[Evgeniy 1999]

Good afternoon. Please help. PMM Siemens S9VT1S pr. number SE66T372EU/01 stopped draining water. I took it apart and washed the float chamber. During disassembly, water remained in the pan. At startup, Aquastop worked. I took it all apart again and dried it. Still, it doesn’t pour water, the aquastop doesn’t open, I try to apply 220 volts directly to the aquastop valves, it opens and the hose is blown out. When starting, the PMM hums, but there is no voltage on the contacts of the aquastop, and there is also no voltage on the microswitch (with three terminals, water level sensor in the pan). The PMM does not produce any errors. I removed the brains, visually like new. Tell me, maybe there is some other sensor in the circuit: an aquastop valve - a water valve in the sump or a problem in the brain, they do not supply power to this circuit.