I've never seen that model, but on other controllers I've seen adjustment pots for several functions. Possibilities are the LVC, as you mentioned, others are the throttle zero calibration, current limit, and PWM frequency.
It's nice to know what they do.
I'd be real careful when tweaking the pots. The motor could suddenly start.
One method I've used is to carefully mark the original position of the pot, then write down the amount turned (so you can put it back to the starting point). Some pots are multi-turn.
Adjust one pot at a time, slightly, then test the controller to see what changed.
If you can't figure out what changed, tweak it a bit more.
If nothing seems to change, put the pot back to the original position and tweak the next one.
If you raise the current limit, there's a chance of blowing it up under high load.