77
EN
Cod. 3542B230 - Rev. 00 - 02/2022
OMNIA S HYBRID H 3.2
12.4 Boiler fault codes
The screen displays the fault id code in the event of faults or malfunctions.
There are faults which cause permanent blocks (marked with the letter “A”): to reset operation, just press the button for 5 seconds and confirm with the button
or with RESET on the remote timer control (optional), if installed. If the boiler does not restart, the fault must be resolved.
Other faults cause temporary blocks (marked with the letter “F”) which are automatically reset as soon as the value returns to the normal operation range of the boiler.
Fault
code
Fault
Possible cause
Remedy
A01
The burner does not ignite
No gas
“Check that the gas flow to the boiler is normal and that the air has been
eliminated from the pipes”
Detection/ignition electrode fault
“Check the electrode wiring and make sure it is correctly positioned and free
of any deposits. Replace the electrode, if necessary.”
Insufficient mains gas supply pressure
Check the mains gas supply pressure
Siphon clogged
Check and clean the siphon, if necessary
Air/fume pipes clogged
“Unclog the flue, fumes exhaust pipes, air inlet and terminals.”
Incorrect calibration
“Run the calibration procedure [AUTO SETUP].”
Faulty gas valve
“Check and replace the gas valve, if necessary”
A02
Flame signal present with
burner off
Electrode fault
Board fault
“Check the ionisation electrode wiring”
Check the electrode for damage
Electrode grounded
Cable grounded
Check and clean the siphon, if necessary
Check the board
F05
Fan fault
No 230V power
Check the wiring of the 5-pole connector
Tachometric signal interrupted
Fan damaged
“Check the fan and replace it, if necessary”
A06
No flame after ignition
phase
Ionisation electrode fault
“Check the position of the ionisation electrode, remove any deposits and run
the calibration procedure [AUTO SETUP]. Replace the electrode, if neces-
sary.”
Flame unstable
Check the burner
air/fume pipes clogged
“Unclog the flue, fumes exhaust pipes, air inlet and terminals”
Siphon clogged
Check and clean the siphon, if necessary
Incorrect calibration
“Run the calibration procedure [AUTO SETUP].”
Insufficient mains gas supply pressure
Check the mains gas supply pressure
F15 -
A07
High fumes temperature The fumes probe detects an excessive temperature
Check the exchanger
Check the fumes probe
Check the flue material parameter
A08
Overtemperature protec-
tion triggered
Sensor not correctly positioned on the delivery pipe
or damaged
“Check the correct position and operation of the heating sensor and replace it,
if necessary”
“No water circulation in the system”
Check the circulator
Air in the system
Bleed the system
A09
Exchanger protection
triggered
“No water circulation in the system”
“Check the circulator and heating system”
“Poor circulation and abnormal increase in the
delivery probe temperature”
Bleed the system
exchanger clogged
check the exchanger and system
