Sorry for the delay here, didn't realize that you had commented.
I've gotten this Cross3 error a few more times since this post, and most of the time the fix is:
(1) reset BIOS settings to "KUKA Default" values (2) replace the CMOS battery in the Motherboard of the PC of the Controller
To reset the BIOS, power down the controller and then turn it back on.
- As soon as the first black screen appears, there will be a message that says "hit DEL to run set up". This is the black screen that pops up before Windows starts. Hit the "DELETE" button as instructed. This will take you to the BIOS menu.
- Once you're in the BIOS menu - and the structure of the BIOS set up varies between hard drives - go to DEFAULT > KUKA > LOAD KUKA DEFAULT VALUES? > YES.
- To exit BIOS and resume boot up hit ESC > SAVE CHANGES AND EXIT > ENTER
Hopefully this helps! Feel free to private message me with further questions so that I'm notified of your response.