I need help here please, I have been running a Pheonix Multiplus 12/3000/120/16 firmware version no. 1909112 HEX on our boat for 12yrs now and over the last couple of years there has been issues with batt temp error codes, stuck in bulk charge with internal temp light flashing but with no charge current and certainly not getting warm, these issues are becoming more constant, is this unit just getting too old? the batteries are 4 x Lifeline 6v GPL-16T connected in series for 12v to give 880 amp hrs, I believe I can not update this firmware as the unit is too old, is that correct? I do have a new Multiplus on board as a spare unit with firmware no. 2609430 and are wondering if I can just replace the old unit with the new one straight out of the box with or without updating the firmware? if I should have to update the new Multi's firmware would it be Version 2609485? would there to be any parameters that may need to be changed in the new Multi as I'm not that savvy on how to do that, we also run a 6kva generator and from what I can see the standard battery charge parameters would be fine, can somebody assist me please.
regards Rod.