E40 displayed, unit may not start; often linked to gas type or configuration mismatch.

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.

Possible Causes

Incorrect gas type setting, Wrong injector set fitted, PCB not configured after conversion, Incompatible gas supply

Safety: Only qualified gas engineers should alter gas type or injectors.

Check data plate: Confirm the appliance is approved for the gas type in use (e.g., G20 natural gas or G31 LPG).
Verify configuration: Access installer menu (per manual) and check gas type parameter. Correct if necessary.
Inspect injectors: If the unit was converted, ensure the correct Chaffoteaux injector kit is installed.
Commissioning: A professional must perform combustion checks and adjust settings after any gas type change.

Professional Required 5/5

Gas Injector Kit

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