Main shaft Z-phase sensor error. The control box is not receiving the once-per-turn (Z) signal from the main motor encoder, so it cannot find the needle position.
Shown on JUKI machines including 910N, AMS-210E, AMS-251, APW-895N, APW-896N, DDL-8700B, DDL-9000CF, DDL-9000CS, DDL-900A, DLU-5494N, DP-2100, LBH-1790A and others.
What to check
- Check the encoder cable and its plug on the SDC board for breaks.
- If the cable is good, the encoder or the motor is faulty.
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 LK-1900A engineer manual (page 108); SC 910N instruction manual (page 105); SC-922 instruction manual (page 64); SC-920 instruction manual (page 51); IT-100 instruction manual (page 85). The manual has the complete procedure and connector numbers for your exact model.
Other JUKI error codes
E007 Motor overload · E011 External media not inserted · E012 Read error on external media · E013 Write error on external media · E015 Sewing area exceeded · E016 External media full · E019 File size over · E032 File not compatible · E302 Machine head tilt detected · E703 Panel connected to the wrong machine · E704 System version mismatch · E730 Motor encoder error (A/B phase) · all JUKI codes
Frequently asked questions
What does JUKI error E303 mean?
Main shaft Z-phase sensor error. The control box is not receiving the once-per-turn (Z) signal from the main motor encoder, so it cannot find the needle position.
How do I fix JUKI error E303?
Check the encoder cable and its plug on the SDC board for breaks. If the cable is good, the encoder or the motor is faulty. If the code stays, the fault is usually in the servo motors or control boxes, PCBs and sensors.
Which JUKI machines show E303?
In the manuals we have read, E303 appears on 910N, AMS-210E, AMS-251, APW-895N, APW-896N, DDL-8700B, DDL-9000CF, DDL-9000CS, DDL-900A, DLU-5494N and other models.