Boil, Boil, Toil and Trouble
Posted 08-14-2017 at 05:49 PM by Diamond DW
Remember the battery boiling incident? Unplugged the converter charger to stop that and decided the battery needed a regular charge with my portable charger. Was really having a hard time even getting up to 13.0 volts so I popped the caps off and saw the top of the battery plates. Not good. Ended up adding 700 ml of distilled water to that unit and another 100 ml to the second battery. Furthermore, turns out that with the converter disconnected and the trailer still plugged into shore power the fridge (which was cooling on the AC setting) still needs DC power to the controller board to function. Ran that boiled battery down so even the inside lights wouldn't work anymore. The fridge stopped working as well. Sigh. What's more, the second battery (which had dropped to 12.4 volts) wasn't even helping and wasn't getting charged at all while the first battery was on the charger. Strange. Visual inspection of the 50 amp fuses for both batteries showed all the fuse elements intact. Scratching my head. Came back after the first battery had some time to recover on the charger. Started pulling the 50 amp fuses to scrub the caps and scour the clips. Fuse cap to the second battery came apart in my fingers as I was cleaning it. Element was still fused and intact, just wasn't connected up inside the cap which was impossible to see. This finally explains everything. Next purchase, a full set of 4 replacement 50 amp fuses (plus a few spares). Time to yank and inspect all the other fuses as well.
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