Hi, I had the same problem shortly after I bought it and I sent it to the repair shop under warranty and they are sending me a new one. Have a nice day.

Hi, I have the same problem with my Mop 2S.
If it helps anyone I have performed the following tests:
1) I directly powered the bowl with 12V and it works regularly, the pump starts and the water comes out regularly.
2) I fixed two wires in the spring contacts of the robot so that they come out. I inserted the tray into its compartment and closed the lid, leaving the two wires outside.
3) I connected a tester to the two wires to measure the voltage.
4) When I started the wash, the tester briefly read 4.31V during positioning and then went to 0V.

It seems that in my case the problem is that the robot is not supplying the 12V that goes to activate the tank pump.

Same thing myself. I activated the insurance

I feel the same way.

This can happen if your water is very hard ... in this case you should try to free the 3 small nozzles under the microflora with a needle and a little anti-scale product, also fill the tank with a little anti-scale and let it work to clean the small pump ... if it does not work you should replace the tank if more warranty