Ferroli SKY ECO F 11, Instructions For Use, Installation And Maintenance, Page: 48 / 52

3.4 FAULTS
The heater is equipped with an advanced self-diagnostic system. If a problem arises with
the unit, the fault symbol will flash on the screen and the respective code will be displayed.
Some faults, identified with the letter “A,” will block unit operation.
To restore operation, simply press the RESET key (4 - fig. 1) for 1 second. If the heater
does not reset, the fault must be resolved.
Faults identified by the letter “F” cause temporary blocks that are automatically resolved
when the value returns to the heater's normal operating range.
3.4.1 LIST OF FAULTS
Fault code Fault Possible cause Solution
A01
The burner does not
ignite.
Lack of gas
Make sure gas is
flowing properly to the
heater, and no air is
present in the pipes.
Faulty detection/
ignition electrode
Make sure the
electrode is properly
installed, connected,
and free of deposits.
Faulty gas valve
Check the gas
valve and replace if
necessary.
Gas valve wiring
interrupted
Check the wiring.
Ignition power too
low Adjust the ignition
power.
A02
Flame signal present
while the burner is off
Faulty electrode
Check the ionization
electrode wiring.
Faulty card Check the card.
A03 Protection activated
Faulty DHW sensor
Check the position
and operation of the
DHW sensor.
No water is
circulating.
Check the flow switch.
A06
No flame is present after
the ignition phase.
Low pressure on the
gas network Check the gas
pressure.
Minimum burner
pressure adjustment
Check the pressures.
A09 Faulty gas valve
Wiring interrupted Check the wiring.
Faulty gas valve
Check the gas
valve and replace if
necessary.
A16 Faulty gas valve
Wiring interrupted Check the wiring.
Faulty gas valve
Check the gas
valve and replace if
necessary.
A21
Bad combustion fault
Fault F20 generated
6 times in the last
10 minutes
See fault F20.
A41 Sensor position
DHW sensor
detached from the
pipe Check the position
and operation of the
sensor.
A51 Bad combustion fault
Obstruction of
the aspiration/
evacuation duct
Check the flue.
F04
Card setting fault
Incorrectly
configured card
setting Check the card
setting and change if
necessary.
F05
Card setting fault
Incorrectly
configured card
setting Check the card
setting and change if
necessary.
Faulty fan
Wiring interrupted Check the wiring.
Faulty fan Check the fan.
Faulty card Check the card.
F07 Card setting fault
Incorrectly
configured card
setting Check the card
setting and change if
necessary.
Fault code Fault Possible cause Solution
F10 Faulty DHW 1 sensor
Defective sensor
Check the wiring or
change the sensor. Short-circuited
wiring
Wiring interrupted
F14 Faulty DHW 2 sensor
Defective sensor
Check the fan and the
respective wiring. Short-circuited
wiring
Wiring interrupted
F20 Combustion control fault
Faulty fan
Check the fan and the
respective wiring.
Incorrect diaphragm
Check the diaphragm
and replace if
necessary.
Flue badly sized or
obstructed
Check the flue.
F34
Supply voltage under
180 V. Problems in the
electrical network Check the electrical
installation.
F42 Faulty DW sensor Defective sensor Change the sensor.
F50 Faulty gas valve
Modulating actuator
wiring interrupted
Check the wiring.
Faulty gas valve
Check the gas
valve and replace if
necessary.
48
EN
SKY ECO F
code A73022090