The " brake pot module" discussed here is actually a regen module but a valid part of this discussion. You will need the EV 100 handset to see if function 22 ( Brake resistor module) is set to 47. There are 3 operational procedures that must be done to complete the cal.If you don't have the manual, let us know. Just remember to verify the basics before diving in, the brake and accel control switch adjustments are most common.