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240012994 Rev. B [08/31/2020]
13 - TROUBLE SHOOTING
13.1 Error Messages and Resetting the Boiler - continued
Anomalies Only Displayed in the Fault History
E62
Anti-wind activation with increase of the minimum
fan speed
Check the position of the terminal of the ue duct.
E63/E65 Combustion level out of range Check ue recirculation and combustion levels.
E65
Maximum value of the speed reached / correction of
the ame signal
Check ue recirculation on the ue duct.
E67 Anti-wind activation at maximum power Check the position of the terminal of the ue duct.
E69 Combustion level out of range Check ue recirculation and the combustion levels.
E70
Flame signal problem/micro interruption of the
ame signal
Check cable and integrity of the sensing electrode, verify the
continuity between burner and earth.
E73 Combustion adjustment / modied during operation Review and monitor other codes such as E53 and E92
Error Description Operation
162/317 Incorrect power supply frequency. Incorrect power supply frequency.
169 Flue pressure switch (contact open)
Check pressure switch and cable.
Check obstruction on ue pipe
164/384
Fault ame (parasitic ame). Check correct operation of T. gas valve.
165/385 Input voltage too low. Check power supply
E178
Low return water temperature / anti-freeze
function active
Check the return water sensor, check the circulator, check the
correct circulation of the water. Boiler will exit status when
condition is resolved.
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