Installation and operating instruction
Oil burner WL20/1-C Z
10 Troubleshooting
83307602 1/2019-04 La
61-84
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. 9.14]
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