Installation and operating instruction
Oil burner WL20/2-C Z
10 Troubleshooting
83307702 1/2019-04 La
55-80
Error codes with lockout
The following faults must only be rectified by qualified personnel:
Fault codes
Fault
Cause
Rectification
2 x flashing
No flame,
end of safety time
Oil pump supplies no oil
Oil supply leaking
Check oil supply
Anti siphon valve does not
open
Check valve, if necessary
replace
Shut off device closed
Open shut off device
Pre-filter strainer soiled
Replace pre-filter strainer
Oil pump defective
No oil throughput at the
nozzle
Oil nozzle blocked
Replace nozzle
No ignition
Ignition electrode dirty or
wet
Clean ignition electrode
Ignition electrode spark gap
too big or short circuited
Set ignition electrode
[ch. 9.5]
Ceramic insulator defective
Replace ignition elec-
trode.
Ignition cable defective
Replace ignition cable
Ignition unit defective
Replace ignition unit
Solenoid valve does not
open
Coil defective
Replace coil
Combustion manager does
not detect a flame signal
Flame sensor soiled
Clean flame sensor
Flame sensor defective
Replace flame sensor
Illumination insufficient
Check burner setting
Burner motor does not run
Oil pump seized
Capacitor defective
Replace capacitor
Burner motor defective
Replace burner motor
[ch. 9.12]
No flame formation despite
ignition and oil supply
Nozzle distance incorrect
Check nozzle distance,
adjust if necessary
[ch. 9.7]
Mixing pressure too high
Check mixing pressure
[ch. 7.1.2]
Flashing 4 times
Flame simulation/
extraneous light
Flame signal prior to or after
operation
Extraneous light source
present
Extraneous light detection
from 13 μA
Find and eliminate ex-
traneous light source
Flame sensor defective
Check flame sensor, if
necessary replace
Flame formation during pre-
purge
Solenoid valve leaking
Flashing 6 times
Actuator fault
Actuator does not reach tar-
get position within 10
seconds
Actuator plug unplugged
Plug in actuator plug
Actuator defective
Check actuator, replace if
necessary
Setting of limit switches in-
correct
Check position of limit
switches
Air damper/angle drive
blocked
Check freedom of move-
ment of air damper and /
or angle drive