Zyx-j30 Manual Fixed -

Hold the PROG button while powering on. Keep holding for 10 seconds until all LEDs flash. The manual warns this erases all calibration data.

| Error Code | Meaning | Likely Fix (Manual Reference) | |------------|---------|-------------------------------| | | Power supply undervoltage (<19V) | Replace power supply; check for long cables (section 4.2) | | E203 | Communication timeout | Increase timeout value in software or replace USB cable (page 32) | | E215 | Overcurrent on output | Check for shorted motor windings; reduce acceleration (section 5.7) | | E307 | Encoder signal loss | Inspect encoder cable shielding; re-seat connectors (page 41) | | E420 | Firmware mismatch | Re-flash firmware using the recovery mode (appendix C) | zyx-j30 manual

This is a pulse-desulfation mode. Use this if your battery is old, idle for a long time, or won't hold a charge. It can take 8–24 hours to complete. 3. Understanding the Display Hold the PROG button while powering on