E14
BFT
Photocell Power Supply or Bus Communication Fault
BFT garage door opener shows E14 and the courtesy light flashes; door may not move.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Short circuit on photocell power supply, Incorrect wiring on BFT BUS (2-wire) safety devices, Failed BUS photocell or interface, Reversed polarity on BUS terminals
How to Fix / Troubleshooting
Safety: Disconnect power before modifying BUS or photocell wiring.
- Identify BUS devices: List all BFT BUS-connected devices (photocells, key selectors, etc.) on the 2-wire bus.
- Isolate devices: Disconnect all BUS devices from the control board. Reconnect them one by one, powering up each time, to identify which device triggers E14.
- Check polarity: Ensure BUS+ and BUS− wires are correctly connected on all devices and at the control board.
- Inspect for shorts: Look for crushed cable sections or water ingress in junction boxes.
- Replace faulty device: If one BUS device consistently causes E14 when connected, replace that device.
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Repair Difficulty
Medium
3/5
Required Part
BFT BUS Photocell or BUS Accessory
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