Installation and operating instruction
Oil burner WL5/1-B H
10 Troubleshooting
83272102 1/2019-03 La
53-76
The following faults must only be rectified by qualified personnel:
Fault codes
Fault
Cause
Rectification
Flashing 7 times
Flame failure during opera-
tion
Flame has failed
Oil supply leaking
Check oil supply
Suction resistance in front
of pump too high
Oil nozzle soiled
Replace oil nozzle
Flame signal insufficient
Burner setting incorrect
Check burner setting
Check flame signal
[ch. 7.1.1]
Flame sensor soiled
Clean flame sensor
Flame sensor defective
Check flame sensor, if
necessary replace
Flashing 8 times
Release contact fault
Actuator limit switch does
not close
Actuator defective
Check actuator, replace if
necessary
Contact X3:2 not closed
Bridging plug No. 2 is miss-
ing
Plug in bridging plug No.
2
Temperature switch does
not close
Heat exchanger defective
Check temperature
switch and heat ex-
changer, if necessary
replace [ch. 9.8]
Temperature switch defect-
ive
Flashing 10 times
Combustion manager fault
Burner does not start
Parameters have been
changed
Combustion manager de-
fective
Reset burner [ch. 10.1.2],
if fault reoccurs replace
combustion manager
10.1.3 Illuminated push button flashes
An irregularity is present. The burner does not go to lockout. Once the fault has
been rectified, the error code ceases.
Error codes without lockout
The following faults must only be rectified by qualified personnel:
Fault codes
Cause
Rectification
Flashing green/red
Extraneous light prior to heat demand
Find and eliminate extraneous light
source
Flashing red/orange with pause Excess voltage
Check voltage supply
Flashing orange/red
Low voltage
Check voltage supply
Internal unit fuse (F7) faulty
Replace fuse [ch. 9.15]
Combustion manager fault
Replace combustion manager
Flashing green
Flame sensor soiled
Clean flame sensor
Flame sensor defective
Replace flame sensor
Burner operation with weak flame signal
(< 45 µA)
Adjust burner whilst observing the re-
commended flame signal [ch. 7.1.1]
Glimmering red
OCI mode activated (not used)
Press illuminated push button for
more than 5 seconds
Combustion manager changes to op-
erating mode