after reviewing the service manual if there is any problem with the unit at all it will display a DTC code on the Multifunctional Digital Indicator (MDI). Or look on the controller and see if it is flashing any codes.
If the battery charger is giving any problems it has it's own LED's and will flash codes indicating what problems it might be having.
The charger is integrated into the control system so there are no jumper wires to mess with on this model, it is not like the older units.
He needs to see what the code(s) are and come back and let us know.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.