This should never happen, but it does. The printer driver is configured in such a way that it will only print color and the printer should never asks for the black ink. What did happen is that the printer got confused and jumped out of its graphical mode into text mode. As the printer still receives data that is supposed to be printed in graphics mode, the output will be garbage. At this stage the only thing you can do is to cancel your print job.
Nothing happens There are a few things to check.
Next check if you can preview the file. These files are not supposed to print anything. Well, you come and coulds aks me, but still better have a look at the logfile of the printers. You might discover some problems there.