Supply voltage too high. At power-on the control box measured a mains voltage above its limit.
What to check
- Switch off and measure the supply; use a stabiliser if the voltage is high or unstable.
Switch the machine off before touching any connector. If the code comes back after these checks, the fault is usually in the 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
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 · E11 Position signal abnormal · 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 E01 mean?
Supply voltage too high. At power-on the control box measured a mains voltage above its limit.
How do I fix Jack error E01?
Switch off and measure the supply; use a stabiliser if the voltage is high or unstable. If the code stays, the fault is usually in the control boxes, PCBs and sensors.
Which Jack machines show E01?
The Maintenance Manual lists E01.