: The machine stalls during its initial startup power-on self-test.
Check for lens holder obstructions; may indicate a stuck motor. Edging wheel movement error Manually check for obstructions; run self-tests T1–T7. A08 Access-door operating error Inspect door sensor alignment or motor for stripped gears. A254 General routine check error essilor kappa error codes
2. Centering and Optical Module Errors (The "A" and "N" Series) : The machine stalls during its initial startup