Installation and operating instruction
Oil burner WL5/1-B H-2LN
10 Troubleshooting
83058402 1/2019-04 La
52-72
10.2 Operating problems
The following faults must only be rectified by qualified personnel:
Observation
Cause
Rectification
Poor start behaviour of burner
Mixing pressure too high
Correct mixing pressure
Ignition electrodes set incorrectly
Set ignition electrodes [ch. 9.6]
Mixing head set incorrectly
Set mixing head [ch. 9.9]
Oil pump makes severe mech-
anical noise
Oil pump sucks air
Ensure oil supply is tight
Suction resistance in oil line too high
Clean filter
Check oil supply
Oil nozzle atomisation uneven
Nozzle blocked/soiled
Replace nozzle [ch. 9.4]
Nozzle worn
Flame tube/diffuser has heavy
soot deposit
Oil nozzle defective
Replace nozzle [ch. 9.4]
Mixing head set incorrectly
Set mixing head [ch. 9.9]
Incorrect combustion air quantity
Adjust burner
Boiler room ventilated insufficient
Ensure sufficient boiler room ventila-
tion
Wrong oil nozzle
Check nozzle type [ch. 4.2]
Combustion head sleeve has
heavy soot deposit
Recirculation aperture too small
Increase recirculation aperture
[ch. 9.10]
Combustion pulsating or burner
booming
Mixing head set incorrectly
Set mixing head [ch. 9.9]
Incorrect combustion air quantity
Adjust burner
Wrong oil nozzle
Check nozzle type [ch. 4.2]
CO content too high
Nozzle distance too big
Check nozzle distance, adjust if
necessary [ch. 9.9]
Recirculation aperture too big
Reduce recirculation aperture
[ch. 9.10].
Smoke number and/or CO con-
tent too high on combustion
chamber with reverse flame
Flame enters directly into the boiler flues
Set recirculation aperture (dimen-
sion S3) to +15 … 20 mm [ch. 9.10]
Stability problems
Nozzle distance incorrect
Check nozzle distance, adjust if
necessary [ch. 9.9]
Wrong oil nozzle
Check nozzle type [ch. 4.2]
Recirculation aperture too big
Reduce recirculation aperture
[ch. 9.10].
Restart after flame failure
Burner repeats start process
See error codes flashing 7 times