Manual

Code Faults Cause
of the
fault
Description Checking / solution
L00 PSU FAIL
PCU The PSU integrated in the SU is
defective
Parameters faulty
4 Contact the professional who takes care of
maintenance of the appliance
L01 PSU PARAM FAIL
PCU The safety parameters are incorrect Parameters faulty
4 Contact the professional who takes care of
maintenance of the appliance
L02 STB OUTLET
SU Boiler temperature too high Bad connection
Sensor fault
4 Contact the professional who takes care of
maintenance of the appliance
No water circulation
4 Vent the air in the heating system
4 Check the circulation (direction, pump,
valves)
4 Check the water pressure
L03 DEF.OIL.SENSOR
SU The oil pressure measurement
sensor is faulty
Bad connection
The oil pressure measurement sensor is faulty
4 Contact the professional who takes care of
maintenance of the appliance
L04 BURNER FAILURE
SU Burner start-up failure No ignition
4 Contact the professional who takes care of
maintenance of the appliance
No flame signal.
Air present in the oil circuit.
4 Check that the oil valve is actually open
4 Contact the professional who takes care of
maintenance of the appliance
Presence of the flame but insufficient ionization
(<3 µA)
4 Check that the oil valve is actually open
4 Contact the professional who takes care of
maintenance of the appliance
L05
DEF.INTERNAL
SU Internal SU fault The safety control box on the burner is defective
4 Contact the professional who takes care of
maintenance of the appliance
L06 DEF.SPEED.MOT
SU Fault on the burner motor The safety control box on the burner is defective
4 Contact the professional who takes care of
maintenance of the appliance
The burner motor is defective
4 Contact the professional who takes care of
maintenance of the appliance
L07 DEF.T.WARM UP
SU Preheating period exceeded The reheat fuel oil is defective
4 Contact the professional who takes care of
maintenance of the appliance
The safety control box on the burner is defective
4 Contact the professional who takes care of
maintenance of the appliance
L08 PARASIT FLAME
SU Detection of a parasite flame Signal present whilst there is no flame
4 Contact the professional who takes care of
maintenance of the appliance
L09 OIL.PRES FAIL.
SU Oil pressure over limit
4 Contact the professional who takes care of
maintenance of the appliance
AFC 18 - AFC 24 - AFC 30 6. Troubleshooting
09/01/2014 - 300026440-001-03
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