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I have Riello RLS 100 dual fuel burner, operating on oil.
I am getting intermittent lockout prior to ignition, indicated by the "downward" facing arrow on the LFL burner control
I feel the issue is being caused by an air damper servo motor end switch not supplying voltage at the correct time after pre-purge, and prior to ignition.
I can measure the current from the flame detector and am confident that the lockout is not being caused by the flame detector "seeing" light during the pre-purge cycyle
Has anyone else experienced a similar issue?