After all, I wrote above that it can crystallize again.
I don't understand what is the matter with not knowing the problem? We try to help my colleague somehow, I can confirm what you wrote above.
However, Man gave guidelines with diagrams - algorithms for dealing with errors indicated by the computer.
It is clearly shown what to do.
I open my printed book, error number, I walk like a child on the line, checking e.g. the injector, if it is clogged, changing to a new one or changing the cable.
If the two above-described printscreen errors are active, checking the pump number - the tip is correct - replace the cable plus.
Here we give some hints, because the author of the topic will not buy a bag with the inscription man to check how the pump will inflate it with air.
He will not buy himself a bottle of acid and stick it on the back of the cabin - you can make a connection from a transparent hose, disconnect the air and give hot water under a pressure of 6 to 12 bar and fire the tab in man cats. I do it every day in the service, but I give advice on how to approach a peasant to save a few thousand. PLN at home. I do not know if Man will take this action under a warranty for a customer who does not service the car on the site. It doesn't matter to me, I go to the warehouse and take the pump, replace it and the client goes and doesn't come back - I had a quiet period at work and I allowed myself to open the pumps, clean these 3 membranes inside and they came to life. Of course, these were not yet recommended by Man to replace the pumps, which were already in the container to be returned to the headquarters - but another went to this place, so there was no problem with the number two. It was before their exchange action that came into force, at least with us, as I remember well about a year, I am writing about because I do not remember exactly.
The system is simple and almost maintenance-free - the float tank, which also freezes and needs to be started or replaced - also error and limitations.
Return line flushing or replacement.
Pump and a small filterek at the entrance.
Metal wire or injection.
There are no filters to replace on the staff - decent diagnosis 1.5 hours. I am writing about delivering adblue fluid to the pump and feeding it to the injection - sensor monitoring plus clogged dpf is not moved here.
PS not knowing the problem? If you thought, buddy, that it is for you - absolutely not.
If it's for me, I learn hard, but every day.