Opener shows E13 and will not operate; often after connecting new accessories (keypad, extra photocells, etc.).

Safety first: Turn off mains power before disconnecting or reconnecting any accessory wiring.

• Disconnect all accessories: Remove all low‑voltage accessory connections from the Cardale control board (keypad, photocells, wall station, safety edge interface).
• Restore power and test: If E13 clears with all accessories removed, the fault lies in one of the accessories or its wiring.
• Reconnect one by one: With power OFF, reconnect accessories one at a time, restoring power and testing after each. When E13 reappears, the last connected accessory is suspect.
• Check polarity and wiring: Verify that + and – terminals are correctly wired for each device and that no strands of wire are bridging adjacent terminals.
• Replace faulty accessory: Replace the offending device with a Cardale‑approved accessory or correct model keypad/photocell.