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