DE DIETRICH AFC 18 - AFC 24 - AFC 30 - Manual (Page 35)

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 34