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Cause of fault
Burner trips during pre-aeration:
Air sensor faulty or incorrectly set.
Ignition load incorrectly set.
Gas pressure too low.
Pulsations at start-up:
Ignition electrodes incorrectly set.
Gas pressure too high.
Flue gas side blocked.
Burner pulsates during operation:
Burner incorrectly set.
Burner dirty.
Incorrect chimney.
Burner functioning properly but with occasional blockage:
Ionisation current too low.
UV cell incorrectly positioned.
Voltage drop at certain times.
Incorrectly set or faulty air sensor.
Ignition electrode overload.
Burner control ambient temperature too high.
Ignition spark too weak.
Poor combustion:
Poor draught conditions.
Flue gas temperature too high.
CO2 content too low.
CO content too high:
Surplus air when using natural gas and liquefied
petroleum (propane, butane).
Poor air supply.
Holes in gas nozzle clogged.
Poor fresh air intake.
Flame at incorrect angle due to combustion head out of
position.
Condensation build up in boiler and chimney:
Flue gas temperature too low or gas volume too low.
Action
Increase/decrease air setting. Reduce air volume.
Increase/decrease gas supply Reduce airflow.
Increase pressure. If necessary, contact gas supplier.
Adjust .
Check and adjust using pressure gauge and pressure control valve.
Check the chimney flue.
Adjust.
Clean the burner.
Check and modify dimensions if necessary.
Check. Must be at least 6µA, but should ideally lie between 8-20µA.
Adjust.
Must not drop below 15% of rated voltage. Contact an electrician if
necessary.
Check the settings and reset, or replace.
Replace.
Insulate for heat, Max. 60 °C.
Check the transformer.
Check the chimney.
Boiler overloaded Decrease the gas volume, sweep the chimney if
necessary.
Choke the air supply. Check the boiler for any leakages. Choke the
draught if too high.
Choke the air supply.
Open the air supply. Check flue gas damper.
Clean.
Check and increase.
Check the combustion head and readjust.
Raise the flue gas temperature by increasing gas volume Insulate
the chimney.
39
Bentone
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