¶ What it is
HMS_0700-2000-0002-0004: The AMS slot 1's filament may be broken in the toolhead.
After unloading the filament, the filament has already been pulled back to AMS, but the detection switch of the extruder still detects the filament, and then the printer determines that the filament is broken in the extruder.
Possible causes:
1. A filament is broken near the detection switch and keeps it triggered.
2. The magnet’s torsion spring is stuck, preventing it from returning properly. As a result, the magnet remains close to the Hall sensor even without filament, causing a false detection.
¶ X1/P1 detection switch position
¶ H2D detection switch position
The H2D filament detection switches are located on the dual extruder idlers (on the side of the dual extruder unit).
 The Hall sensor and magnet (left extruder) are on the back of the PCB. |
 The Hall sensor and magnet (left extruder) are revealed with the Hall effect sensor flipped. |
Regardless of the model, the filament detection switch consists of a magnet and a Hall sensor.
¶ Working principle (X1 as an example)
When the filament is inserted, the magnet moves closer to the Hall sensor and automatically springs back when there is no filament. The printer determines whether the filament is inside the extruder based on the detected Hall value.
The magnet moves closer to the Hall sensor after inserting the filament.
When the display screen shows a green dot as shown below, it indicates that the extruder has detected a filament inside. When there is no filament, it shows a white dot. So you can also judge whether there is a filament broken in the extruder by the dot color.
¶ Safety warning and Machine state before starting operation
Always power off the printer before performing any maintenance.
¶ Operation guide
1. Please refer to the links below to remove the filament detection switch and check if there is a broken filament. Also, please check whether the magnet of the detection switch can spring back smoothly.
Hall sensor replacement - P1 Series
Hall sensor replacement - X1 Series
Replace H2D Dual Extruder Idlers and Filament Sensor
If there is something wrong with the detection switch, please contact the customer support team for further help.
2. If you find the filament stuck inside the extruder, you need to remove the extruder for unclogging. You can refer to the videos in this wiki to check and unclog it:
How to Disassemble and Assemble H2D Extruder
3. If you find that the filaments are broken in the tube, please refer to Wiki: Filament break in the path.
¶ Error message:
"The AMS slot[n] filament may be broken in the toolhead."
The error codes below share the same issue as this one:
0700-2000-0002-0004
0700-2100-0002-0004
0700-2200-0002-0004
0700-2300-0002-0004
0701-2000-0002-0004
0701-2100-0002-0004
0701-2200-0002-0004
0701-2300-0002-0004
0702-2000-0002-0004
0702-2100-0002-0004
0702-2200-0002-0004
0702-2300-0002-0004
0703-2000-0002-0004
0703-2100-0002-0004
0703-2200-0002-0004
0703-2300-0002-0004
¶ End Notes
We hope the detailed guide provided has been helpful and informative.
If this guide does not solve your problem, please submit a support ticket. We will answer your questions and provide assistance.
If you have any suggestions or feedback on this Wiki, please leave a message in the comment area. Thank you for your support and attention!