"Cannot Adjust Fusing Unit"

I have recently replaced my fusing unit. Upon powerup with the new unit I tried to run the fuser adjustment procedure. It started and after a few moments failed. I entered the Maintanence menu and tried to run the fuser adjustment and I got the message "Cannot Adjust, See Manuel". After looking at the manuel it said I had to make sure I had plenty of toner, so I put in all new toner cartriges. Still no luck getting the fuser to adjust and even my IKON guy was confused. Got any suggestions. I also have the same problem. I replaced the fuser unit according to the instructions but I gat a message telling me to adjust the fuser unit in the maintenance menu. When I try this, it fails and says "Cannot adjust, see users guide". The users guide does not explain why this is happening nor how to correct this. Someone suggested to set the transfer belt to the home position. I'm not sure how to do this. The manuals do not even mention a transfer belt anywhere on the printer. Any help would be appreciated