E15
Certikin
Communication Fault Between Controller and Remote Panel / BMS
Controller shows E15 and pump stops; alarm log may show 'Communication Error'.
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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
Broken communication cable, incorrect bus termination, mismatched baud rate or address, electrical interference on comms line
How to Fix / Troubleshooting
Safety: Isolate low‑voltage circuits before rewiring communication cables.
- Inspect comms cable: Check RS‑485 or other communication cables between the Certikin controller and remote devices for damage or loose plugs.
- Verify settings: Ensure baud rate, parity, and address settings match on all devices on the bus.
- Check termination: Fit or enable termination resistors at the ends of long RS‑485 runs as per Certikin documentation.
- Test locally: Disconnect external comms and run the pump in local mode. If it runs normally, the issue is with the external communication network.
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Repair Difficulty
Medium
3/5
Required Part
Certikin controller communication module
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