Motor encoder signal is missing or corrupted. Often requires a cable check or motor replacement. Module Abnormal
The synchronizer cannot find the needle position. Check the needle positioner (synchronizer) on the handwheel. Ensure the cable is plugged in. Position Detector Error
Follow the wire originating from the motor's rear or the handwheel back to the control panel box.
Tangled thread under the fabric usually means the upper tension is not engaged. Rethread with the presser foot to ensure the thread seats in the tension discs. Quick Reset Procedure Power down the control box. Allow 10–15 seconds for the capacitors to discharge.
This comprehensive guide breaks down the core digital and mechanical errors you might encounter while working with this machine, what they mean, and how to resolve them quickly to get your assembly line back to work. Core Electronic & Motor Error Codes siruba l818fm1 error list work
Review common troubleshooting steps for industrial lockstitch machines at Manuals.plus Are you seeing a specific code on a digital display, or is the machine having a physical problem like thread bunching? Siruba L818F-BM1BH1 Instruction Manual.pdf
Disconnect the encoder connector, inspect the pins for corrosion or dust, and plug it back in firmly.
(If your unit shows other codes, treat them as controller-specified — power-cycle first, then consult manual.)
: Confirm the main fuse inside the control box hasn't blown due to an electrical short circuit. Always isolate power before checking internal fuses. Motor encoder signal is missing or corrupted
If errors persist after troubleshooting, refer to a qualified technician for further electronic repairs.
Is your machine using an or an under-table control box ?
Verify that the power supply voltage meets the machine's requirement.
Check the encoder cable port on the back or side of the motor/control assembly. Firmly tighten any loose screw-on connectors. Check the needle positioner (synchronizer) on the handwheel
The motor is not rotating properly. This is typically due to a mechanical obstruction (like jammed thread in the hook) or a motor connection issue.
The is a high-speed, 1-needle lockstitch industrial sewing machine frequently used in garment manufacturing due to its efficiency, automatic thread trimming, and reliable direct-drive servo motor. However, like all computerized industrial machinery, it can encounter electrical or mechanical issues, displaying error codes to prevent damage.
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An extraordinary signal has been inputted into the control system, or the motor connector is not properly plugged in.