Panel – CPU communication error. The operation panel cannot communicate with the control box.
What to check
- Switch off and check the panel cable and its plug are tight; if they are, the panel or the control board is faulty.
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
E01 Supply voltage too high · E02 Supply voltage too low · 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 E03 mean?
Panel – CPU communication error. The operation panel cannot communicate with the control box.
How do I fix Jack error E03?
Switch off and check the panel cable and its plug are tight; if they are, the panel or the control board is faulty. If the code stays, the fault is usually in the control boxes, PCBs and sensors.
Which Jack machines show E03?
The Maintenance Manual lists E03.