¶ Issue Description
The extruder motor, located in the center of the toolhead, is utilized to drive the extruder gears. When the printer is powered on, the extruder motor will run a self-check. If a short circuit is detected in the motor, the printer will stop and prevent printing until the issue is resolved.
Extruder motor control circuit diagram
**Possible causes: **
- Motor short circuit
- Malfunction of the driver on the TH board
¶ Troubleshooting
¶ Tools, Equipment and Materials
- H2.0 hex screwdriver
- H1.5 hex screwdriver
¶ Troubleshooting Workflow
¶ Troubleshooting Steps
Users may adjust the order of the following steps if necessary.
¶ Step 1. Disassemble the Toolhead to Expose the TH Board and Check the Motor Cable Connection
Refer to the Wiki guide: Replace the H2S Extruder Unit, Steps 1–3, to expose the TH board.
Unplug the extruder motor cable
¶ Step 2. Check if the toolhead functions normally
Power on the printer again and check whether the error still appears or not:
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If the error message persists → The problem likely lies with the TH board. Proceed to Step 3.
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If no error appears → Power off the printer again, reconnect the extruder motor cable, and continue with Step 4.
¶ Step 3. Replace the TH Board
If the TH board is identified as faulty, replace it by following the official guide: Replace H2S TH Board.
¶ Step 4. Power-On Test
Once the TH board or cable has been reconnected, power on the printer again; it will automatically run the self-check:
If the error still appears, the problem may be with the extruder motor. Continue to Step 5.
¶ Step 5. Replace the Extruder Motor
If the cable connection is confirmed to be secure but the issue persists, follow the Wiki guide: Replace the H2S extruder motor to replace the extruder motor.
If the above steps do not resolve your issue, please submit a ticket and upload your printer logs
¶ Conclusion
We hope this guide will provide you with useful information and help you solve problems.
To ensure that you operate safely and effectively, if you have any doubts or questions about any steps in the guide, please contact our Customer Support team before starting the operation.
We are always happy to answer your questions and provide support.
Click here to contact online technical support (service hours 9:00-21:00)