¶ Fault Code Meaning
Extruder Unload Failure (Unload Timeout - 15 s)
¶ Possible Causes
- Filament broken inside the PTFE tube
- Filament detection board false trigger
- Unload time exceeds 15 seconds and the unloaded length is less than 120 mm
¶ Troubleshooting Steps
¶ Check for Broken Filament in the PTFE Tube and 4-in-1 Hub Assembly
- Turn off the printer power switch and unplug the power cord.
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- Check the PTFE tube for broken filament.
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- If the filament is broken on the CANVAS side, use tweezers to gently press the end of the PTFE tube connector. Wait until the PTFE tube loosens, then pull it out and remove the broken filament.
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- If the filament is broken on the 4-in-1 hub side, disassemble the 4-in-1 hub to remove the broken filament.
- If the filament is broken on the CANVAS side, use tweezers to gently press the end of the PTFE tube connector. Wait until the PTFE tube loosens, then pull it out and remove the broken filament.
¶ How to Disassemble the 4-in-1 Hub
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Use 2.0 mm and 2.5 mm Allen keys to remove the screws securing the Tool head communication cable / Tank chain. Unplug the Tool head communication cable connector and remove the Tank chain.
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Use a 2.0 mm Allen key to remove the two screws securing the 4-in-1 hub assembly. Disconnect and remove the 4-in-1 hub assembly.
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Check the 4-in-1 hub assembly / Gear box for broken filament.
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If no broken filament is found in the Tool head or PTFE tube after inspection, proceed to further troubleshooting below.
¶ Check the Filament Detection Board
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Unplug any PTFE tube from the upper side of the CANVAS.
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Manually feed filament into the PTFE tube and continue pushing until it cannot advance any further.
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Access the control menu on the Tool head and check whether the Tool head icon lights up green. (The icon lights up green when filament passes through the 4-in-1 hub into the Tool head. The green light turns off after the filament is withdrawn.)
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If the icon does not light up green, the Filament detection board may have an assembly issue. Refer to the guide below to reinstall the Filament detection board:
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If the Tool head icon still does not light up green when feeding filament after reinstalling the Filament detection board, replace the Filament detection board with a new one.
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