Display shows code 14, opener will not run, courtesy light may flash, beeping heard.

Safety first: Disconnect power before altering accessory wiring. Ensure all safety devices are functional before returning the opener to service.

• Identify accessories: Note any wired key switches, keypads, safety edges, or loop detectors connected to the Merlin opener.
• Isolate devices: One by one, disconnect accessory wires from the opener terminals (not the safety beams). Restore power and test after each removal to see if the error clears.
• Check for shorts: Inspect accessory cables for crushed insulation or water ingress. Replace damaged cables.
• Verify wiring per manual: Confirm that each accessory is wired to the correct terminals and that normally open/closed contacts match the Merlin wiring diagram.
• Replace faulty accessory: If removing a specific device clears the code, repair or replace that accessory before reconnecting.