WMF Combination S various problems

Hello,

I got me a WMF Combination from the bay because there is a lot of coffee consumed in the house.

The machine works so far very well and has already achieved a lot and replaced some parts.

Some problems remain though.

1.
When normalizing the flow the error occurs:
"Error. No steam Pos."
Comes from the espresso nozzle?

2.
When starting the machine, so immediately after sizing comes up BW NW HZ OK SP
The machine does not pass directly to the draw but remains stuck at SP.
Only if I pull the set container and plug it in again, you can get it.

3.
I have a brown water when using hot water (for tea, etc...). Even after I completely cleaned and decalcified the boiler. After a few days the brown water comes back. That could be anything if I see it right. I don't know if there's something rusting together or if there's coffee leftovers in the kettle, anyway.


Is there a service manual for the machine in any way? I'm not technically just untalented but at these three points I get stuck

Can anyone help me? It would be a shame if you had to say goodbye to such a good device.

Dear greetings

You ever call WMF? I'm sure they have operating instructions. Then one would at least know what the messages mean. Otherwise, this is a Gastro device, there you will probably not get much help here.
MfG Paul

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KVA:WMF 800 ST: Lelit Bianca PL 162