Installation and operating instruction
Gas burner WG20…/1-C Z-LN
10 Troubleshooting
83054602 1/2020-01 La
73-96
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 Flame signal at heat demand Find and eliminate perturbation
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.9.16]
Combustion manager fault Replace combustion manager
Flashing red Low gas Check gas connection pressure
Set gas pressure switch [ch.7.3.1]
Check gas pressure switch
orange, after 5seconds red Air pressure switch does not react Set air pressure switch [ch.7.3.2]
Check air pressure switch
With ducted air intake air pressure
switch, check air supply
Flashing green Burner operation with weak flame signal Minimum ionisation current 1.5 μA
Check burner setting
Ionisation electrode soiled Clean ionisation electrode
Ionisation electrode defective Replace ionisation electrode
Glimmering red OCI mode activated (not used) Press illuminated push button for
more than 5 seconds
Combustion manager changes to op-
erating mode
10.2 Operating problems
The following faults must only be rectified by qualified personnel:
Observation Cause Rectification
Poor start behaviour of burner Mixing pressure too high Reduce mixing pressure in ignition
position
Ignition electrode set incorrectly Set ignition electrode [ch.9.5]
Mixing head set incorrectly Set mixing head [ch.9.4]
Ignition load set incorrectly Set ignition load [ch.7.2]
Combustion pulsating or burner
booming
Mixing head set incorrectly Set mixing head [ch.9.4]
Incorrect combustion air quantity Adjust burner
Stability problems Mixing pressure too high Decrease mixing pressure
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