E16
BWT Perla
Regeneration Time-Out Fault
Display shows E16 and the unit indicates an abnormal regeneration duration
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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
Valve not reaching positions due to mechanical jam, Insufficient water pressure during regeneration, Blocked drain or brine line slowing flow, Incorrect cycle time parameters
How to Fix / Troubleshooting
Safety first: Unplug the unit and close isolation valves before mechanical work.
- Check water pressure: Verify that inlet pressure meets BWT Perla specifications. Low pressure can extend regeneration steps beyond allowed time.
- Inspect valve movement: Start a manual regeneration and observe whether the valve motor moves smoothly through all positions. If it stalls, refer to valve positioning fault procedures (similar to E04).
- Check drain and brine lines: Ensure both lines are free of blockages and correctly routed to allow proper flow rates.
- Verify programming: In the installer menu, confirm that regeneration step times are set to factory defaults unless specifically adjusted by a technician.
- Service valve head: If mechanical resistance is felt or the motor overheats, the valve head may need cleaning or replacement.
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Repair Difficulty
Hard
4/5
Required Part
Valve Head Assembly
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