I looked up the error in the operating manual and it states:

The magazine does not rotate although the magazine start command has been issued. Or the magazine shifted. Either a sensor error or mechanism trouble is presumably the the cause ( Timer 5: sec).

Under the DGN column it lists #1002.7

I assume DGN is for diagnose. Looking at #1002 it is 10011101 and I assume the .7 implies bit 7 which is currently set as 1.

When I push the button to home the carousel it lights but the carousel doesn't move at all. I'm suspecting a stuck sensor someplace.

Before I simply start blindly removing panels I figured it would be best to ask where I should start looking first.