Converter will not charge batteries

I first want to thank everyone who gave me advice. I was so confused with the converter and the fact that the 12v system was intact as well as the 120v system. However, with the converter turn on and the battery disconnected, the converter should have operated the 12v system but it did not. I therefore thought there was a problem with 12v circuit board. I then removed it completely, pulled the board out and then rewired. While I was rewiring it, I check all the fuses. The fuses for the individual circuits were good. When I checked the two 30A fuses to protect from reverse polarity, then were burnt. These were the only fuses I did not check. I always thought the problem was the TC. When I replaced the two 30A fuses the converter started to charge the battery and when I disconnected the battery, the converter ran the 12v as well. Just to say I did not check the most obvious problem first. Thanks everyone for helping.