E16
Aquabion
Display-to-Main Board Communication Failure
Display shows E16 and the Aquabion softener reports a communication error between display and main board (on modular models).
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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 ribbon cable between display and control board, Damaged communication cable, Failed display module, Faulty main control board communication port
How to Fix / Troubleshooting
Safety first: Disconnect power before removing the display or controller covers.
- Inspect communication cable: On Aquabion models with a separate display, remove the front panel and locate the ribbon or data cable. Ensure it is fully seated at both ends.
- Check for damage: Look for kinks, cuts, or corrosion on the cable and connectors. Replace the display cable if any damage is found.
- Module substitution: If possible, test with a known-good display module. If the error clears, replace the display. If not, the main control board may be at fault.
Warning: Handle ribbon cables by the connectors only; pulling on the cable can break internal conductors.
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Repair Difficulty
Medium
3/5
Required Part
Display Module Cable
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