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3.3. TROUBLESHOOTING
3.3.1. 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 page 28 or 29 problem
will automatically removed
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 cabeling 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 at first
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
of all
3-) Check all radiator valves are open if they are closed open of all
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 failiure
> 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
of all
3-) Check all radiator valves are open if they are closed open of all
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 at first
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 failiure
> 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
of all
3-) Check all radiator valves are open if they are closed open of all
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 at first
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 at first
2-) Check gas valve cabeling between board and gas valve
E 12
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 cabeling 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 at first
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 at first
