Door reverses to open position immediately after starting to close; no error code shown.

Safety first: Do not force the door closed against resistance; identify and correct the cause.

• Check for obstructions: Inspect the floor, tracks, and around the door for objects, ice, or debris. Remove anything in the path.
• Verify photocells: Ensure the safety beams are aligned and their LEDs indicate normal operation. Clean lenses and adjust brackets as needed.
• Test manual operation: Disconnect the opener and move the door by hand. If it binds or feels heavy, have the door hardware serviced.
• Adjust force settings: If the door moves freely, slightly increase the close force setting on the Cardale control panel, following the manual and safety guidelines. Do not exceed recommended limits.