Occurs when machine inertia is too high or the motor encoder signal is interrupted. Solutions include lengthening the deceleration time or checking the encoder connector. E3 (Motor/Machine Lock):
: Ensure all connectors on the back of the control box are seated firmly. Electronic control parameter manual - SiRUBA Sewing Machine siruba+l818fm1+error+list+2021
90% of "Motor Locked" errors are just a stray thread caught in the hook. Remove the bobbin case and clean out any lint. Occurs when machine inertia is too high or
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