The AMS does not support certain filaments (such as TPU) and some larger size spools. These filaments will need to be printed on the spool holder behind the printer.
If the filament has already been fed to the toolhead extruder, click on the AMS page of the screen, select the slot in use and press the unload button to unload the filament back to the AMS.
Skip this step if the filament has already been unloaded to the AMS.
Refer to this page to load the new filament from spool holder Loading filament | Bambu Lab Wiki
Previously, AMS users needed to unplug the AMS cable before loading filament from the spool holder to print filament not supported by AMS. This was a problem for people who placed their X1 in a location where the rear of the machine was not easily accessible. To solve that problem, our new firmware provides an option to Enable or Disable the AMS when starting a print.
When the "Enable AMS" option is checked, the AMS will be used for a print. If the option is unchecked, the printer will instead pull filament loaded from the spool holder. Users can now easily switch between the AMS and spool holder without unplugging the cable.
If the filament has already been fed to the toolhead extruder, click on the AMS page of the screen, select the slot in use and press the unload button to unload the filament back to the AMS.
Skip this step if the filament has already been unloaded to the AMS.
NOTE: If you use firmware before OTA 1.0.0.0, you will need to turn OFF the printer first.
Refer to this page to load the new filament from spool holder Loading filament | Bambu Lab Wiki