Position signal abnormal. The control box is not receiving the needle-position signal from the motor encoder.
What to check
- Switch off; check the encoder plug is tight and undamaged, then restart.
Switch the machine off before touching any connector. If the code comes back after these checks, the fault is usually in the servo motors or control boxes, PCBs and sensors.
Request a repair for this error or WhatsApp the code and your model to +91-9643480908 (Monday to Saturday, 10:00 AM to 8:00 PM (closed Sunday)).
Source
Summarised by Shankar Sewing from the Maintenance Manual (page 2). The manual has the complete procedure and connector numbers for your exact model.
Other Jack error codes
E01 Supply voltage too high · E02 Supply voltage too low · E03 Panel – CPU communication error · E05 Speed controller (pedal) contact fault · E07 Motor plug / locked head / overload · E08 Manual operation over 15 seconds · E10 Solenoid over-current · E14 Encoder signal abnormal · E15 Power module over-current · E17 Head protection switch · E20 Motor failed to start · all Jack codes
Frequently asked questions
What does Jack error E11 mean?
Position signal abnormal. The control box is not receiving the needle-position signal from the motor encoder.
How do I fix Jack error E11?
Switch off; check the encoder plug is tight and undamaged, then restart. If the code stays, the fault is usually in the servo motors or control boxes, PCBs and sensors.
Which Jack machines show E11?
The Maintenance Manual lists E11.