98
Fault code dis-
played
System characteristics
Cause
Measures
EA
Burner in a fault state
Ionisation current too low
during calibration. Differ-
ence compared to previ-
ous value not plausible.
Check ionisation electrode and
connecting cable. Check plug-in
connections for loose contacts.
Check whether there is a lot of
dust in the ventilation air (e.g. from
construction work).
Check flue system; remove flue
gas recirculation if required.
Check system for condensate
backup.
Note
To prevent water damage, detach
fan unit before removing the burn-
er.
Replace coding card if fault is per-
manent.
Note
Deposits on the electrodes indicate
foreign bodies in the combustion
air. Check the installation room and
flue system for causes of the de-
posits. For example: laundry deter-
gents, cleaning agents, toiletries,
deposits in the ventilation air sup-
ply (chimney).
If burner gauze assembly and ioni-
sation electrode have been re-
placed, also clean fan unit, gas/air
channel and Venturi extension.
Press reset button
R
.
Troubleshooting
Fault codes
(cont.)
5789 302 GB
Diagnosis
Summary of Contents for B2TB
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