Installation and operating instruction
Oil burner WL40Z-A
10 Troubleshooting
83298002 3/2019-11 La
85-112
10.3 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 in ignition
load, if necessary set P
0
different to
P
1
Ignition electrodes set incorrectly
Set ignition electrodes [ch. 9.5]
Mixing head set incorrectly
Set mixing head [ch. 9.7]
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
Nozzle worn
Flame tube/diffuser has heavy
soot deposit
Oil nozzle defective
Replace nozzle
Mixing head set incorrectly
Set mixing head [ch. 9.7]
Incorrect combustion air quantity
Adjust burner
Boiler room ventilated insufficient
Ensure sufficient boiler room ventila-
tion
Wrong oil nozzle
Check nozzle type
Combustion pulsating or burner
booming
Mixing head set incorrectly
Set mixing head [ch. 9.7]
Incorrect combustion air quantity
Adjust burner
Wrong oil nozzle
Check nozzle type
CO content too high
Nozzle distance too big
Check nozzle distance, adjust if
necessary [ch. 9.7]
Stability problems
Nozzle distance incorrect
Check nozzle distance, adjust if
necessary [ch. 9.7]
Wrong oil nozzle
Check nozzle type
No display at operating panel
Plug from operating panel not properly
plugged in
Plug in plug on combustion manager
correctly
Operating panel defective
Replace operating panel
Flame sensor LFS1 (optional)
flashes green
Burner operation with weak flame signal
(< 10 μA)
Decrease mixing pressure
Fit larger nozzle and reduce pump
pressure.
Check setting dimension flame
sensor RAR9 [ch. 9.17], adjust if re-
quired.
Check combustion head extension,
maximal 200 mm.
