C Tek D250s Dual Pulsating Issue Solved

Just a note for others who may benefit by using the installation diagram at www.ctekbatterychargers.com The main difference is that unlike the install instructions that come with the unit it shows the location of the earth's. The solar has to be earthed to the Dual directly and not to the battery directly. The D250s is earthed to the battery so the solar earth ends up at the battery going via the D250s.

I also did find that the D250S has 3 fuses internally for I assume 3 circuits. The indicator lamps on the unit are shared by the 3 circuits , so in my case it was not apparent that I had blown a internal fuse until I had disconnected the solar and only then did the indicator lamps go out.

Apparently they don't like under hood heat and behind the glove box is the suggested location Worth further investigation if you have not already installed or are having issues.. Mine was mounted in a ute canopy and so heat was not a issue. I had wired my earth from the solar incorrectly and I assume my attempts at fault finding had caused the fuse internally to blow.

The intention of the post is that it may help someone else. I am not sure why the manufacturer has not shown the location of the earth's in the installation sheet that came with the product. I had assume all earth's would go directly to the battery which I now know is not correct