Installation and operating instruction
Oil burner WM-L20/2-A R (W-FM100/200)
10 Troubleshooting
83252902 1/2019-09 La
60-84
10.2 Rectifying faults
The following faults must only be rectified by qualified personnel:
Fault
Cause
Rectification
Burner motor does not run
No voltage
Check voltage supply
Overload relay or motor protection
switch has tripped
Check setting
Motor contactor / frequency converter
defective
Replace motor contactor / frequency
converter
Motor defective
Replace motor
No ignition
Ignition electrodes too far apart or short
circuit
Set ignition electrode [ch. 9.4]
Ignition electrode dirty or wet
Clean and adjust ignition electrode
[ch. 9.4]
Ceramic insulator defective
Replace ignition electrode.
Ignition cable defective
Replace ignition cable
Ignition unit defective
Replace ignition unit
Fuel valve does not open
No voltage
Check voltage supply
Coil defective
Replace coil
Oil pump supplies no oil
Shut off device closed
Open shut off device
Oil supply leaking
Anti siphon valve does not open
Check valve and replace if necessary
Oil filter of oil supply soiled
Clean filter insert or replace
Oil pump defective
Replace oil pump
No oil throughput at the nozzle
Nozzle blocked
Replace nozzle
No flame formation despite igni-
tion and fuel
Ignition electrode set incorrectly
Set ignition electrode [ch. 9.4]
Mixing pressure too high
Correct mixing pressure in ignition
load setting, if necessary adjust
mixing head [ch. 4.3]
Poor start behaviour of burner
Mixing pressure too high
Correct mixing pressure in ignition
load setting, if necessary adjust
mixing head [ch. 4.3]
Ignition electrode set incorrectly
Set ignition electrode [ch. 9.4]
Too much or too little fuel
Correct fuel quantity in ignition posi-
tion via fuel actuator
Combustion manager does not
detect a flame signal
Flame sensor soiled
Clean flame sensor
Flame signal insufficient
Check flame signal
Check flame sensor
Check burner setting
Flame sensor defective
Replace flame sensor
Combustion pulsating or burner
booming
Incorrect combustion air quantity
Check combustion values
Mixing head set incorrectly
Set mixing head [ch. 4.3]
Back pressure from the system
Check flue gas system [ch. 12.2]
Flame failure during operation
Oil supply leaking / suction resistance
too high
Oil nozzle soiled/worn
Replace nozzle
Flame signal insufficient
Check flame signal
Check flame sensor
Check burner setting