Ferroli ATLAS D ECO 34 COND UNIT Instructions D'utilisation, D'installation Et D'entretien page 44

3.4 Troubleshooting
Diagnostics
The boiler is equipped with an advanced self-diagnosis system. In case of a boiler fault,
the display will flash together with the fault symbol (detail 22 - fig. 1) indicating the fault
code.
There are faults the cause permanent shutdowns (marked with the letter "A"): to restore
operation, just press the RESET button (detail 8 - fig. 1) for 1 second or use the RESET
on the remote timer control (optional) if installed; if the boiler does not restart, it is nec-
essary to eliminate the fault indicated in the operation LEDs.
Other faults cause temporary shutdowns (marked with the letter "F") which are automat-
ically reset as soon as the value returns within the boiler's normal working range.
ATTENTION
From software version 23, an additional feature has been introduced to facilitate burner
calibration, i.e. flame flashing on the display to indicate that the burner is on but with in-
dication of non-optimal flame.
For the various software versions, the meanings of the symbols shown on the display
can be found in the table 1.
Table. 5- Flame symbol indications
Indication on the display and meaning
Software
Flame Off Flame On Steady
Version
Burner off Burner on
22
Burner on and indication of stable
Burner off
23
flame
Table. 6 - List of faults
Fault
Fault Possible cause
code
Pump blocked
Faulty electric motor
Faulty oil valve
No fuel in tank, or water on bot-
tom
Oil line feed valves closed
Dirty filters (line-pump-nozzle)
Pump unprimed
Ignition electrodes not properly
adjusted, or dirty
Nozzle clogged, dirty or
deformed
A01 Burner block Unsuitable head and shutter
adjustments
Faulty electrodes or earthed
Faulty ignition transformer
Faulty electrode wires or earthed Replace
Electrode wires deformed by
high temperature
Faulty valve or transformer elec-
trical connections
Broken pump-motor joint
Pump inlet connected to return
pipe
Faulty photoresistance
Dirty photoresistance
Photoresistance short circuit
Flame present
A02 signal with burner
Extraneous light strikes the pho-
off
toresistance
Heating sensor damaged
Overtemperature
A03 protection activa-
No water circulation in the sys-
tion
tem
Air in the system
Card parameter
A04 Wrong card parameter setting
fault
Preheater fault Preheater fault
(the contact does
F07
not close in 120
Wiring disconnected
seconds)
Card parameter
F09 Wrong card parameter setting
fault
Sensor damaged
Delivery sensor 1
F10 Wiring shorted
fault
Wiring disconnected
44
EN
ATLAS D ECO COND UNIT
Fault
code
F11
F12
F14
F16
F34
F35
F37
F39
Flame Flashing
-
F40
Burner on with indication of NOT
optimal flame
A41
F42
Cure
Replace
F47
Replace
Replace
Refill with fuel or suck the
water
Open
Clean
Prime and find the cause of
unpriming
Adjust or clean them
Replace
Adjust
Replace
Replace
Replace and protect
Check
Replace
Correct the connection
Replace
Clean the photoresistance
Replace the photoresist-
ance
Eliminate the light source
Check the correct position-
ing and operation of the
heating sensor
Check the circulating pump
(See table 7)
Vent the system
Check the card parameter
and modify it if necessary
Check the preheater
Check the wiring
Check the card parameter
and modify it if necessary
Check the wiring or replace
the sensor
cod. 3541Q464 - Rev. 00 - 12/2021
Fault Possible cause
Sensor damaged
DHW sensor fault Wiring shorted
Wiring disconnected
Card parameter
Wrong card parameter setting
fault
Sensor damaged
Delivery sensor 2
Wiring shorted
fault
Wiring disconnected
Card parameter
Wrong card parameter setting
fault
Supply voltage
Electric mains trouble
under 170V.
Faulty mains fre-
Electric mains trouble
quency
Pressure too low
Incorrect system
water pressure
Sensor damaged
Probe damaged or wiring shorted
External probe
Probe disconnected after activat-
fault
ing the sliding temperature
Incorrect system
Pressure too high
water pressure
Sensor position- Delivery sensor not inserted in
ing boiler shell
Heating sensor
Sensor damaged
fault
System water
pressure sensor Wiring disconnected
fault
Cure
Check the wiring or replace
the sensor
Check the card parameter
and modify it if necessary
Check the wiring or replace
the sensor
Check the card parameter
and modify it if necessary
Check the electrical system
Check the electrical system
Fill the system
Check the sensor
Check the wiring or replace
the sensor
Reconnect the external sen-
sor or disable the sliding
temperature
Check the system
Check the safety valve
Check the expansion tank
Check the correct position-
ing and operation of the
heating sensor
Replace the sensor
Check the wiring