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2.3. TROUBLESHOOTING
2.3.1. Failure Codes Table
Error
Code
Description of the Error Malfunction Probable Cause Solution(s)
E 01
Intervention of exhaust
Thermostat (Open
Combustion Chamber
boiler )
Boiler does not work,
E01 error code flashing on
the screen
> Flue Sensor faulty 1-) Reset & Restart boiler
2-) Call for authorised service at first
E 02 Low water pressure in the
system/system parameter
wrongly setted
Boiler does not work,
E02 error code flashing
on the screen
> Water pressure in the boiler not
enough
1-) Fill the boiler 1,2-1,5 bar according to manual
2-) Check if the system pressure 1,2 - 1,5 bar from the manometer
located right & bottom of the boiler
3-) If problem persist Call for authorised service
4-) Reset & Restart boiler
E 03 High water pressure in
the system
Boiler does not work,
E03 error code flashing
on the screen
> High Water pressure in the
boiler higher than > 2,8 bar
1-) Call for authorised service at first
2-) Check intermittent contacts or open contacts on harness carefully
3-) Check Domestic heating water temperature sensor ressistance
according to page 95 at section 4.30 if its out of tolerance replace
NTC
4-) Check Cabling and connectors between double NTC and board
5-) Reset & Restart boiler
E 04
Domestic heating water
temperature sensor faulty
Boiler does not work on
DHW mode but still work
on Central heating mode,
E04 error code flashing on
the screen
> Domestic heating water
temperature sensor faulty
1-) Call for authorised service
E 05 Central heating FLOW
temperature sensor faulty
Boiler does not work,
E05 error code flashing
on the screen
> Central heating FLOW
temperature sensor faulty
1-) RESET boiler at first check if problem removed
2-) Check other gas devices if they are working
3-) Check main gas suppy valve is open or not
4-) Check boiler gas suppy valve bellow the boiler is open or not
5-) RESET boiler at first check if problem removed
6-) Call for authorised service at first
E 06 No ignition Boiler does not work,
E06 error code flashing
on the screen
> Gas supply failure 1-) RESET boiler at first check if problem removed
2-) Check boiler central heating valves are open if they are closed
open all
3-) Check all radiator valves are open if they are closed open
minimum 3 meters of radiator must be open
4-) RESET boiler and check if problem removed
5-) Call for authorised service at first
E 07
Safety thermostat
intervention
Boiler does not work,
E07 error code flashing
on the screen
> Lack of water on the system
> Pump blockage
> Pump failure
> Pump harness
> Installation blockage
1-) RESET boiler at first check if problem removed
2-) Check boiler central heating valves are open if they are closed
open all
3-) Check all radiator valves are open if they are closed open
minimum 3 meters of radiator must be open
4-) RESET boiler and check if problem removed
5-) Call for authorised service at first
E 08 Flame circuit failure False flame signal from
combustion or electrode
> Water blokage on syphon
> Electronic board
1-) Call for authorised service
E 09 No water circulation
in the system
Boiler does not work,
E09 error code flashing
on the screen
> Lack of water on the system
> Pump blockage
> Pump failure
> Pump harness
> Installation blockage
1-) RESET boiler at first check if problem removed
2-) Check boiler central heating valves are open if they are closed
open all
3-) Check all radiator valves are open if they are closed open
minimum 3 meters of radiator must be open
4-) RESET boiler and check if problem removed
5-) Call for authorised service at first
E 10
Central heating
temperature RETURN
sensor faulty
Boiler does not work,
E10 error code flashing
on the screen
> Central heating RETURN
temperature sensor faulty
1-) Call for authorised service
E 11 Gas valve modulator
disconnected
Boiler does not work,
E11 error code flashing
on the screen
> Gas valve harness 1-) Call for authorised service
2-) Check gas valve cabling between board and gas valve
DHW temperature Probe,
in storage tank mode, fault
Boiler does not work,
E12 error code flashing
on the screen
> Domestic heating water
temperature sensor in storage tank
faulty
1-) Call for authorised service at first
2-) Check intermittent contacts or open contacts on harnesscarefully
3-) Check Domestic heating water temperature sensor ressistance
4-) Check Cabling and connectors between NTC and board
5-) Reset & Restart boiler
E 13 Exhaust temperature
probe over-temperature
alarm
Boiler does not work,
E13 error code flashing
on the screen
> Over temperature flue gas outlet
value > 105 C°
1-) Call for authorised service
E 14 Exhaust ( FLUE )
temperature probe fault
Boiler does not work,
E14 error code flashing
on the screen
> Central heating FLUE temperature
sensor faulty
1-) Reset & Restart boiler
2-) Call for authorised service
E 15 Fan failure (feedback/
supply)
Boiler does not work,
E15 error code flashing
on the screen
> Fan harness 1-) Reset & Restart boiler
2-) Call for authorised service
E 16 Central heating
temperature RETURN
sensor faulty
Boiler does not work,
E10 error code flashing
on the screen
> Central heating RETURN
temperature sensor faulty
1-) Reset & Restart boiler
2-) Call for authorised service
E 17
Temperature difference
between FLOW and LIMIT
NTC (Double Heating
Probe) faulty
FLOW and LIMIT sensor
(DOUBLE NTC)
malfunction
> FLOW and LIMIT Sensor
( double NTC ) faulty
1-) Reset & Restart boiler
2-) Call for authorised service