E11
Weishaupt
Communication failure between WCM system controller and W-FM burner control
Controller indicates communication error with burner module
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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 bus cable, Damaged communication wiring, Incorrect addressing or configuration, Defective control module
How to Fix / Troubleshooting
Safety: Disconnect power before unplugging control cables.
Steps:
- Check bus connections: Locate the communication cable between the WCM system controller and the W-FM burner control. Ensure all plug connectors are fully seated and locked.
- Inspect cable: Look for mechanical damage, crushed sections, or moisture ingress in junction boxes.
- Power cycle: Turn off power for 30 seconds, then restore. Some transient communication errors clear after a reset.
- Configuration: Verify (via display or manual) that the correct burner type and address are configured in the WCM controller. This is typically a technician task.
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Repair Difficulty
Hard
4/5
Required Part
WCM System Controller
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