Installation and operating instruction
Oil burner WM-L20/2-A R (W-FM100/200)
10 Troubleshooting
83252902 1/2019-09 La
61-84
The following faults must only be rectified by qualified personnel:
Fault Cause Rectification
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 [ch.12.1]
Oil nozzle atomisation uneven Nozzle soiled/worn Replace nozzle
Combustion head is contamin-
ated with oil or has heavy car-
bon deposits
Oil nozzle defective Replace nozzle
Mixing head set incorrectly Set mixing head [ch.4.3]
Incorrect combustion air quantity Adjust burner
Boiler room ventilated insufficient Ensure sufficient boiler room ventila-
tion
Nozzle assembly and diffuser not
centred
Check centralisation of nozzle as-
sembly to diffuser
Fuel valve does not close tight Dirt particles in the fuel valve Replace fuel valve
Heavy material erosion on the
flame tube
High boiler room temperatures or acidic
combustion air due to ambient condi-
tions
Use H1 flame tube with higher tem-
perature resistance
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