131
Control unit
message
System characteristics
Cause
Measures
F.463
Burner in a fault state
Ionisation current too low
during calibration
Check ionisation electrode and
connecting cable. Check plug-in
connection for loose connections.
Heat generator installation
and service instructions
Check flue system or flue gas re-
circulation.
Reset 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 device.
Troubleshooting
Fault messages on the gas condensing…
(cont.)
5853335
Diagnosis