0700_0300
Moderate
Bambu Lab · FDM 3D Printers
AMS Hub Communication Error - Data Link Between AMS and Printer Failed
Quick Answer
Error code 0700_0300 on your Bambu Lab FDM 3D Printers means: AMS Hub Communication Error - Data Link Between AMS and Printer Failed. This is usually fixable — see the step-by-step guide below.
Likely Causes
How to Fix It
1
Power off the printer and AMS, then reseat the communication cable at both ends
2
Ensure both the printer and AMS are updated to the latest firmware via Bambu Studio
3
Try connecting the AMS to a different AMS port on the printer if available
4
Check the AMS status LEDs for error indication patterns (refer to Bambu Lab wiki for LED codes)
5
If the issue persists after reseating cables and updating firmware, contact Bambu Lab support for possible hardware replacement
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Replacement AMS communication cable
Replacement AMS hub board (if hardware fault confirmed)
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