DE DIETRICH INNOVENS MCA 25_28 BIC - Manual (Page 36)

Code Faults Cause
of the
fault Description Checking / solution
L00 PSU FAIL PCU PSU PCB not connected Bad connection
PSU PCB faulty
4 Contact the professional who takes care of
maintenance of the appliance
L01 PSU PARAM FAIL PCU The safety parameters are incorrect Bad connection
PSU PCB faulty
4
Contact the professional who takes care of
maintenance of the appliance
L02 DEF.OUTLET S. PCU The boiler flow sensor has short-
circuited
Bad connection
Sensor fault
4
Contact the professional who takes care of
maintenance of the appliance
L03 DEF.OUTLET S. PCU The boiler flow sensor is on an open
circuit
Bad connection
Sensor fault
4 Contact the professional who takes care of
maintenance of the appliance
L04 DEF.OUTLET S. PCU Boiler temp too low 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
L05 STB OUTLET PCU 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
L06 BACK S.FAILURE PCU The return temperature sensor has
short-circuited
Bad connection
Sensor fault
4
Contact the professional who takes care of
maintenance of the appliance
L07 BACK S.FAILURE PCU The return temperature sensor is on
an open circuit
Bad connection
Sensor fault
4
Contact the professional who takes care of
maintenance of the appliance
L08 BACK S.FAILURE PCU Return temperature too low 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
6. Troubleshooting MCA 25/28 BIC
35 31/08/2011 - 300024163-001-B