The same thing happened to me!I took the risk of invalidating my warranty and opened up the pedal box.the wires to the brake pots are very thin,and are maintained in place,by sliding them into a tight - and very sharp edged - slot on a lug, I recently moved my computor and CH pedals upstairs and on setting them up I found the right brake did not work!What had happened is that in lifting them upstairs,somehow the wires had streched against these sharp edges,severing the fine wire!
The solution was to repair the wire,I was succesful but I would not recommend doing this yourself,as your problem may be different and you will invalidate the warranty,once the seal is broken.
I would contact CH.