The motor is trying to turn but cannot. This is often a mechanical blockage rather than an electrical one. Check if thread is jammed in the hook or bobbin area. Turn the handwheel manually to feel for resistance. Ensure the belt tension (if applicable) isn't too tight. E4: Communication Error
80% of "E" errors are solved by cleaning lint (E-01, E-02) and reseating connectors (E-04, E-06). Only 20% require parts replacement. Always start simple. siruba l818fm1 error list work