Need Help! 2030 limit switch alarm

Hi,

I have a Chevalier 2040MV, 16 position tool changer (caroulsel type), Fanuc O-MD control. Getting a 2030 limit switch alarm which my manual says it is tool changer limit switch error. Both switches are fixed. Alarm happens after G91G28Z0 execution when the only movement is Z going home. Tool changer is still in the tool change position. Next command is T__ and then G91G30Z0. I transposed the two switches to make sure it wasn't the switch.

Any suggestions?

Jim