Kromschroder L-Module 74960677

The Kromschroder L-Module 74960677 is a control module designed for use in burner management systems of the BCU560, BCU565, and BCU580 series with air management function (F3). It is part of the controller's electronic circuit, handling flame monitoring, air damper adjustment, and capacitive element control. The module supports flame detection via ionisation, UV, or IR methods. It is an original component from Kromschroder, identified by article numbers 74960677 and 624.103.171.

Parts of this type are selected by exact series and type designation, supply voltage, safety and pre-purge times, and the flame detection method. The module is typically mounted on a base or directly plugged into a wiring harness. Before ordering, verify the supply voltage and flame detection method against the existing control, and check the connector pattern or base plate for mechanical fit. Replacement must match the original part number exactly to avoid safety hazards.

When modules of this kind fail, the burner may fail to ignite, lock out on flame failure, or exhibit erratic operation of the air damper. The equipment may show error codes related to flame supervision or air control. Check the module for visible damage, loose connections, or signs of overheating, and verify that the flame detector signal is reaching the module correctly.