E12
SMEG
Communication Bus Failure
Ice maker shows a communication error between display and main control board.
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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
Loose harness between user interface and main PCB, Damaged communication cable, Faulty display board, Defective main PCB communication circuit
How to Fix / Troubleshooting
Safety first: Disconnect the appliance from mains power before removing the control panel.
Steps:
- Access control panel: Remove the screws securing the front control panel or top cover to expose the display board and wiring.
- Check connectors: Locate the multi-pin connector linking the display to the main PCB. Unplug and replug it several times to clean contacts. Ensure it is fully seated.
- Inspect cable: Follow the cable route and look for pinched, cut, or burnt sections. Replace the harness if damaged.
- Board substitution: If wiring is intact, the fault may lie in either the display board or main PCB. In practice, technicians often replace the main PCB first, then the display if the error persists.
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Repair Difficulty
Hard
4/5
Required Part
User Interface Board
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