E20
Aquabion
Resin Capacity / Bed Monitoring Fault
Display shows E20 and the Aquabion softener indicates a resin bed or capacity calculation error.
Advertisements
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.
Advertisements
Possible Causes
Incorrect resin volume programmed, Hardness sensor misreading, Flow sensor miscounting, Resin fouling or channeling
How to Fix / Troubleshooting
Safety first: Disconnect power before opening the controller or resin tank connections.
- Verify programming: Confirm that the resin volume and hardness settings match the actual Aquabion resin tank size and water analysis.
- Check sensors: Clean and test the hardness sensor and flow sensor as described in E01 and E09.
- Resin inspection: If water remains hard and E20 persists, the ion exchange resin may be fouled (iron, manganese, organics) or channeled. This often requires professional evaluation, resin cleaning, or replacement.
Warning: Opening the resin tank without proper procedure can cause media loss and flooding. Consider professional service for resin work.
Advertisements
Repair Difficulty
Hard
4/5
Required Part
Ion Exchange Resin
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements