Ron,
I don't see anything obviously wrong... Your Power Center is different than the ones I have seen before.. The old ones have a fuse in a fuse holder stuck away in the corner... I like this one..
Logic says that the problem have to be with the transformer or the circuit card.. In 60 years of doing this stuff I have never seen a bad transformer that was not initially connected wrong.. Generally, wired for 120 and connected to to 240... Power Transformers just don't go bad unless someone screws them up.. That leaves the board.. The board takes the 24 to 28 AC input volts and changes it into about 40 DC volts..
I am not sure if the fuse is in the input AC side or the DC output side..
If this is a new unit, I would contact the seller and tell them it does not work...
If it was not under warranty, I would recommend that you measure the 28 volts AC out of the transformer and see what it reads...
Thanks,
Jim R.