Troubleshooting in marathon
®
gas and dual fuel burners
dreizler A 3001 E - 18.12.2015 | A 2012 - 1.09 | EN - 23.10.2009
159
NOTICE:
For more information on servomotors, see dreizler
®
operation manuals SQM 50, SQN 30 and SQN 70.
NOTICE:
The waste gas damper must always be open during burner operation.
MIN cam and MAX cam are too
close together.
Select new setting.
Error
Possible cause
Trouble shooting
Error
Possible cause
Trouble shooting
Burner outputs error intermit-
tently during operation.
Air pressure switch switches off.
Check air pressure and set setpoint
to 80% of min. available differential
air pressure from blower. Replace
air pressure switch where required.
Burner management system is
defective.
Replace burner management sys-
tem.
Flame monitoring signal uneven.
Electrode or sensor requires read-
justment.
Decrease in ionisation current due
to invisible cracks in the wire insu-
lation.
Install replacement electrode.
Check valve output pressure with
manometer.
Replace valve drive or compact
actuator where required.
Decrease of ionisation current due
to leakage current.
Check ionisation electrode for mois-
ture residue and replace where
required.
Error
Possible cause
Trouble shooting
Flame pulsation during burner
start-up.
Incorrect installation position of
ignition electrodes.
Check ignition electrodes for correct
installation position.
Pressure surge too high during
burner start-up.
Reduce ignition capacity.
Insufficient pressing of the com-
bustion air blower.
Clean fan impeller.
Check inlet.
Incorrect position of waste gas
damper.
Check position of mechanical or
electric waste gas damper.