re: lift.
ha welcome to our world.our official title is 'lift mechanic'!
to the problem i too dont know what a 300c controler is, ie is it a 401, 411,301 etc. the easy way to test if your water is an issue is to disconnect the line and short the cct to the board out. i wouldnt have thought a safety cct has a serial data system but at least you can move fwd.also clearly the lift doesnt know where it is in the shaft as its showing '0' as an error. does the lift level into floor when you reset the lift from above which would indicate at least terminal slowing to stop works. check this out and let us know how you go.
