Eaton Fuller automated transmission problem

[bigben]

I have a Eaton Fuller automated transmission 18 speed on Cummins x 15 and [/size] lately every morning I turn the key on the F sign comes on and says transmission fault service. I turned the key on and off couple of times and it goes away. I changed the transmission fuse and sometimes it failed to start the truck. Any help will be appreciated. [size=medium]