170 091 16 15-01
3(3)
Cause
Remedy
The burner is operating correctly but locking out now and
then
The ionisation current is too low
Check. Must be at least 4 µ A according to
the relay manufacturer but should be 8-20 µ A.
The UV-cell is in a wrong position
Adjust
Voltage drop at certain times
Must not drop more than 15% of the rated
current. Contact the electricity authorities if
necessary.
Air pressure switch defective or incorrectly adjusted
Spark-over in ignition electrodes
Replace the electrodes
The ambient temperature of the gas relay is too high
Heat insulate, max. 60° C.
The ignition spark is too weak
Check the transformern
Bad combustion
Bad draught conditions
Check the chimney
The flue gas temperature is too high
The boiler is overloaded. Reduce the
quantity of gas.
The CO2-content is too low
Check the boiler with regard to leaks. Choke
the draught if it is too high.
The CO-content is too high
Excess air when using natural gas and gasoil (propane, butane)
Choke the air.
Air shortage
Open the air supply. Check the flue gas
damper.
The holes in the gas nozzle are clogged
Clean
The fresh air intake is too small
Check and enlarge.
The flame is not burning straight because the burner head is out of
position
Check the burner head and readjust.
Condensation in boiler and chimney
The flow gas temperature is too low or the quantity of gas is not
sufficient
Increase the flue gas temperature by
increasing the gas supply. Insulate the
chimney
Summary of Contents for STG 146
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