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Boiler cleaning
1.
Disconnect the power supply to the boiler.
2.
Remove the front top and bottom panel.
3.
Open the door by undoing the knobs.
4.
Clean the inside of the boiler and the entire path of exhaust fumes, using a tube
brush or compressed air.
5.
Then close the door, securing it with the knob.
To clean the burner, refer to the Manufacturer's instructions.
Accessing the electrode and nozzle
•
Disconnect the transformer electrode cables and remove the photoresistance 1, and
the union 2 connecting the oil pipe to line 3 of the nozzle. Loosen the screws 4 and
pull out the nozzle-baffle-electrode flange assembly.
•
Undo the screw 5 to remove the baffle and screw 6 to remove the electrodes. Proper
cleaning of the nozzle is obtained by removing the filter and cleaning the slots and
spraying hole with petrol, rinsing it with fuel oil. When reassembling everything, pay
attention to the correct positioning of the electrodes-baffle.
6
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.
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 3.
Table. 3- 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
34
EN
3
4
1
2
4
fig. 31
5
fig. 32
Flame Flashing
-
Burner on with indication of NOT
optimal flame
cod. 3541Q964 - Rev. 01 - 11/2022
ATLAS D ECO 56 UNIT
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
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
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 sen-
sor
Check the wiring or replace the sen-
sor
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
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
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