S1: Does the mower automatically switch between NRTK and RTK modes? If not, how can I switch it manually?

No. It works in only one mode at a time, it does not auto‑switch. You can manually switch between them via Settings > Manage RTK.

 

Important: NRTK can work without the RTK being plugged. However, the RTK module must be powered on and binded to the mower otherwise it cannot change from NRTK to RTK.