Error 201 means the access 2 module is getting voltages that are too low or too high. I would check the cables running to the access 2 module for shorting.
If the cables are good, put a dvom on the battery positive and battery negative terminals on the access 2. If voltage is equal to the battery voltage then you will have to calibrate the battery (service menu, calibration, C3.4)
If it is lower than the battery voltage there may be an issue with the pump contactor
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.