HI keith

Ok the 39 relates to incorrect truck type set and this makes sense with 81 and 83 as they relate to incorrect parameters set.

The 18 relates to armature current error.

Did you have the controller replaced? and after replacing some of these units the other errors occurred?

The best thing to do is first access the controller settings through the display and set the truck type to the type of truck you have, this should eliminate 39,81 and 83 errors. If there is any other problems with the unit or on the truck this may become clear after.

Also if you do require these controllers that can be arranged as i stock these units.