Aquabot Bravo stops 20 second after its start

by Deniz
(Istanbul)

Hello,

I have an 3 years old aquabot bravo. uts power supply 240 volt to 24v.

After it is working 15-20 second than 5-10 seconds to opposite side and stops.

I checked debris which can prevent its move but there is nothing.

What could be the reason and do you suggest any solution?

If there is a need to buy a spare part I can also buy from US.

Thank you