This prompt will pop up when unloading from the spool holder if the filament is not pulled out of the extruder in time. If you don’t pull out the filament, the extruder hall sensors will always be triggered, and the system will think that the “unload” instruction has not been completed, thus blocking all subsequent instructions.
HMS_07FF_2000_0002_0004 Please pull the external filament from the extruder.
This message appears when printing with the spool holder because printing with the spool holder does not complete the automatic unloading process and you need to manually pull the filament out of the tool head to complete the unloading process.
This message appears when printing with the AMS, this is due to the last time the spool holder was used for printing, as printing with the spool holder does not allow for the automatic unloading process and the filament may not have been manually pulled out of the tool head, so we recommend checking to make sure that the filament has been pulled out of the tool head first, and that the PTFE tubes that are connected from the AMS to the printer are all connected.
Expand knowledge: If the filament in the current tool head is coming from one of the AMS slots, before the filament is loaded through the AMS, the AMS will automatically unload the filament from the tool head, return it to the AMS and re-load the tool head, and the prompt will not appear either.
If the error persists after you remove the filament, there may be a broken filament inside the extruder, or the extruder's filament detection switch is triggered abnormally, please refer to the Wiki for troubleshooting: HMS_0700_2000_0002_0004: The AMS slot1's filament may be broken in the tool head | Bambu Lab Wiki
You can also use the dot color on the control page of Bambu Studio or the display screen to determine if there is a filament inside the extruder.