I have the same problem. I have the H100x ELITE, and a 220T case. I plugged the pump fan into the motherboard pump header, and the RGB into the 220T lighting node that came with the case. So the result is the cooling side works fine, but no RGB on the pump. Fans work just fine on the lighting node too. Problem gets a little worse for me though. The port I plugged the pump RGB into is now dead too, so I went from 6 down to 5 working lighting node ports.
I tried plugging the pump RGB into another port but no luck. Just glad when I tried, the other port didn't die.