Dolphin M5 issue with drive motor, any ideas?

[Dunlapjc]

Good morning,
I have a dolphin M5 that has an issue. One sides drive motor will not go backwards.
1) in one direction it travels straight and both tracks spin.
2) in the opposite direction only one track spins
3) the corresponding turn only works in one direction
4) this happens whether you are in auto mode or remote control mode

Obviously this makes the unit perform marginally at best. Does anyone have any ideas or thoughts on potential root cause and fixes?

Thanks,
Jon

 

[duraleigh]

My experience with Maytronics tech support has been decent. Have you called them?

 

[scotty409]

I hope it's ok if i copy and paste your description into a new thread because that is EXACTLY what mine is doing. Unfortunately, after putting new motors in - it still does it. My only conclusion is the circuit board located on the bottom side of the motor box lid has malfunctioned.