Ferroli ATLAS D 50 UNIT Instructions D'utilisation, D'installation Et D'entretien page 46

4.4 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 that cause permanent shutdowns (marked with the letter "A"): to restore
operation, 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 necessary
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.
Table. 4 - List of faults
Fault
Fault Possible cause
code
Pump blocked
Faulty electric motor
Faulty oil valve
No fuel in tank, or water on bottom
Oil line feed valves closed
Dirty filters (line-pump-nozzle)
Pump unprimed
Ignition electrodes not properly
adjusted, or dirty
Nozzle clogged, dirty or deformed
Unsuitable head and shutter adjust-
A01 Burner block ments
Faulty electrodes or earthed
Faulty ignition transformer
Faulty electrode wires or earthed
Electrode wires deformed by high
temperature
Faulty valve or transformer electri-
cal connections
Broken pump-motor joint
Pump inlet connected to return pipe Correct the connection
Faulty photoresistance
Dirty photoresistance
Photoresistance short circuit
Flame present signal with
A02
Extraneous light strikes the photore-
burner off
sistance
Heating sensor damaged
Overtemperature protection
A03
activation No water circulation in the system
Air in the system
A04 Card parameter fault Wrong card parameter setting
Preheater fault (the contact
F07 does not close in 120 sec- Wiring disconnected
onds)
F09 Card parameter fault Wrong card parameter setting
Sensor damaged
F10 Delivery sensor 1 fault Wiring shorted
Wiring disconnected
Sensor damaged
F11 DHW sensor fault Wiring shorted
Wiring disconnected
F12 Card parameter fault Wrong card parameter setting
Sensor damaged
F14 Delivery sensor 2 fault Wiring shorted
Wiring disconnected
F16 Card parameter fault Wrong card parameter setting
F34 Supply voltage under 170V. Electric mains trouble
F35 Faulty mains frequency Electric mains trouble
46
EN
Fault
code
Cure
Replace
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
Replace and protect
Check
Replace
Replace
Clean the photoresistance
Replace the photoresistance
Eliminate the light source
Check the correct positioning and
operation of the heating sensor
Check the circulating pump
Vent the system
Check the card parameter and modify
it if necessary
Check the wiring
Check the card parameter and modify
it if necessary
Check the wiring or replace the sensor
Check the wiring or replace the sensor
Check the card parameter and modify
it if necessary
Check the wiring or replace the sen-
sor
Check the card parameter and modify
it if necessary
Check the electrical system
Check the electrical system
cod. 3541I330 - Rev. 00 - 04/2016
ATLAS D 50 UNIT
Fault Possible cause
Pressure too low
Incorrect system water pres-
F37
sure
Sensor damaged
Probe damaged or wiring shorted
F39 External probe fault
Probe disconnected after activating
the sliding temperature
Incorrect system water pres-
F40 Pressure too high
sure
Delivery sensor not inserted in boiler
A41 Sensor positioning
shell
F42 Heating sensor fault Sensor damaged
System water pressure sen-
F47 Wiring disconnected
sor fault
Cure
Fill the system
Check the sensor
Check the wiring or replace the sen-
sor
Reconnect the external sensor or dis-
able the sliding temperature
Check the system
Check the safety valve
Check the expansion tank
Check the correct positioning and
operation of the heating sensor
Replace the sensor
Check the wiring