Bosch SVM40E10 after the start goes to the end of the wash. ⇐ Bosch

[Sciper]

Good afternoon everyone. After starting, the Bosch SVM40E10 alternately turns on the circulation pump and pump several times and goes to End without even drawing water. What could it be? The water error does not light up. Does this machine have any technical menu or diagnostics?

[Luntik]

Start small, look at the pressure, blockages, hoses no lower than 40cm from the floor, reset

[Luntik]

Forgot, the door closes until it clicks? Is the castle ok?

[Sciper]

Yes, of course, everything is ok with the water supply, even the filter is almost clean. The door also closes well. The fact is that the machine does not even attempt to open the water supply valve (it should click) and starts the circulation pump. Yes, if there was no water supply, then a water error would pop up, but here everything is in order. The impression is that the machine mistakenly understands the presence of water in the pan, starts the circulation pump, and then, not detecting pressure, discharges the water into the sewer. If only I could find a schematic diagram or at least know the self-test algorithm when starting the machine. I checked the tens. I sinned on them. Resistance is about 21 ohms. It does not supply short-term voltage to the tens for diagnostic purposes. What kind of sensors does this car even have to check?

[Luntik]

Perhaps the inlet valve has failed or the water level sensor is faulty, maybe there is something wrong with the control module, the leakage protection system may be faulty, you can look for a diagram on the Internet.

[Sciper]

The intake valve rings (4.2 kilo-ohms). I searched for the diagram and couldn’t find it. I would be grateful if you provide a link. If only there was some technical information on it. And so complete zero! It’s as if such a car doesn’t exist. Where is the water level sensor installed in this machine? And on what principle does it work? By the way, the car did not die immediately, but gradually. Sometimes it wouldn’t start

Sent after 4 minutes 8 seconds:
It has a pulse water filling sensor installed

[Luntik]

Well, how can I tell you where the water sensor is installed? Should I disassemble my PMM and send photos of all the sensors? All the diagrams are on the Internet, should I look for them? They told you what to watch first.

[Sciper]

Well, how can I tell you where the water sensor is installed? Should I disassemble my PMM and send photos of all the sensors? All the diagrams are on the Internet, should I look for them? They wrote to you what to watch first.

Sorry for contacting the wrong address. I thought that you were an expert and that you could tell me something sensible.

And I figured out the dishwasher. Maybe this will help someone. It turns out that third generation dishwashers do not have a water sensor. The role of this sensor is performed by the circulation pump. The algorithm is as follows. When the washing process starts, the machine briefly starts the circulation pump. If the current consumption is small, then the motor spins at idle, which means there is no water in the pan. If there is water, then the load increases and the current increases. So, if there is no water, then the machine begins the washing process. If there is water, the pump turns on for about 20 seconds. Then the circulation pump starts again, and if the load is high, the machine understands this as a pump malfunction. On machines with a display, an error appears, but in my case, End just lights up.
Hence the conclusion. The circulation pump is severely worn, and the rotor scrapes against the housing, increasing the load.
In short. I removed the circulation pump and disassembled it. Replaced the graphite inserts that act as bearings. (There are offers on the Internet for purchasing them) assembled and installed. Everything worked. True, the shaft was also offered. I turned it out and put a caprolon bushing on it. Of course, this is a half measure, but 19 tr. I was not ready to pay for a circulation pump. I’ll see how long it lasts after such repairs.
So the topic can be closed.

[Twinkle]

Sciper, you have a second generation dishwasher. You must have a pressure switch and a flow sensor.