How to Fix HMS 0700-6000-0002-0001: AMS Internal Communication Error

Bambu Lab HMS error code 0700-6000-0002-0001 falls within the 0700-6000 AMS internal subgroup. While the 0700-0100 subgroup covers communication between the printer and the AMS hub, the 0700-6000 subgroup covers communication that is internal to the AMS unit itself — between the AMS hub board and the individual slot control boards.

What the Error Means

The AMS contains multiple PCBs: a central hub board and individual slot boards (or a combined multi-slot board depending on the model) that control each feed motor and sensor. These communicate over an internal bus. Suffix 0002-0001 in the 0700-6000 group indicates an internal AMS communication failure — one or more slot boards are not responding to the hub board correctly. Causes include a loose internal connector between AMS boards, a failed component on a slot board, or an AMS firmware issue creating protocol incompatibility between the hub and slot firmware.

Step-by-Step Fix

  1. Power off the AMS and printer. Allow both to fully discharge before opening the AMS enclosure.
  2. If comfortable with internal access, open the AMS base or side panel to access the internal PCB connections. Consult the Bambu Lab service wiki for your specific AMS model before disassembly.
  3. Locate and reseat all internal ribbon cable or wire connectors between the hub board and slot boards.
  4. Power on and observe whether the AMS initializes all slots correctly (all slot LEDs should cycle through their startup pattern).
  5. Check the AMS firmware version via the printer’s settings menu. If the AMS firmware is not on the latest version, update it via the printer’s OTA system.
  6. If one specific slot appears inactive while others work, the slot board for that position may have a component fault.
  7. Power cycle the full system (printer and AMS) after each change and test with a filament change cycle.

Parts Required

  • No parts required for connector reseating
  • AMS slot board or hub board if a component-level failure is found

Contact Bambu Lab support for AMS internal PCB replacement — these are not end-user field-replaceable parts in most configurations.