99
Displayed fault
code
System characteristics Cause Measures
F.463 Burner in a fault state Contaminated combustion
air, flue gas recirculation
Heat generator installation
and service instructions
Check flue system for contamina-
tion and flue gas recirculation.
Clean flue system if required.
Reset the burner.
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 de-
tergents, cleaning agents, toilet-
ries, deposits in the ventilation air
supply (chimney).
If burner gauze assembly and ioni-
sation electrode have been re-
placed, also clean fan unit, gas/air
channel and Venturi extension.
Reset the appliance.
Troubleshooting
Fault messages (cont.)
5593201
Diagnosis
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