Weishaupt WG20-/1-C LN Series - Page 68

Installation and operating instruction
Gas burner WG20…/1-C LN
10 Troubleshooting
83240802 1/2020-01 La
68-96
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
No ignition Ignition electrode set incor-
rectly
Set ignition electrode
[ch.9.5]
Ignition electrode dirty or
wet
Clean ignition electrode
Ceramic insulator defective Replace ignition elec-
trode.
Ignition cable defective Replace ignition cable
Ignition unit defective Replace ignition unit
Double gas valve does not
open
Cable defective Check cable, if necessary
replace
Coil defective Replace coil [ch.9.13]
Combustion manager does
not detect a flame signal
No ionisation current
present or insufficient
Measure ionisation
current [ch.7.1.1]
Set ionisation electrode
[ch.9.5]
Check contact resistance
(terminal, plug)
Correct burner setting
When using an un-
earthed mains supply
(control transformer) the
pole which is to be used
as neutral conductor
must be earthed
Ionisation electrode worn Replace ionisation elec-
trode
Ionisation cable defective Replace cable
Flashing 3 times
Air pressure switch fault
Air pressure switch does
not react
Hoses not attached tightly Check hoses on air pres-
sure switch
Air pressure switch set in-
correctly
Set air pressure switch
[ch.7.3.2]
Cable defective Check cable, if necessary
replace
Air pressure switch defect-
ive
Check air pressure
switch, if necessary re-
place
Burner motor does not run Capacitor defective Replace capacitor
Cable defective Check cable, if necessary
replace
Burner motor defective Check burner motor, if
necessary replace
Flashing 4 times
Flame simulation/
extraneous light
Flame signal prior to or after
operation
Ionisation current present Extraneous light detection
from 0.8µA
Find and eliminate per-
turbation
Ionisation electrode defect-
ive
Check the ionisation
electrode, replace if ne-
cessary