DeDietrich MCA 45 User Manual page 46

7. Troubleshooting
Code Faults
L03 DEF.OUTLET S.
L04 DEF.OUTLET S.
L05 STB OUTLET
L06 BACK S.FAILURE
L07 BACK S.FAILURE
L08 BACK S.FAILURE
L09 STB BACK
45
Cause Description
of the
error
PCU The boiler flow sensor is on an open
circuit
PCU Boiler temp too low
PCU Boiler temperature too high
PCU The return temperature sensor has
short-circuited
PCU The return temperature sensor is on
an open circuit
PCU Return temperature too low
PCU Return temperature too high
Checking / solution
Bad connection
Sensor fault
Contact the professional who takes care of
4
maintenance of the appliance
Bad connection
Sensor fault
Contact the professional who takes care of
4
maintenance of the appliance
No water circulation
Vent the air in the heating system
4
Check the circulation (direction, pump,
4
valves)
Check the water pressure
4
Bad connection
Sensor fault
Contact the professional who takes care of
4
maintenance of the appliance
No water circulation
Vent the air in the heating system
4
Check the circulation (direction, pump,
4
valves)
Check the water pressure
4
Bad connection
Sensor fault
Contact the professional who takes care of
4
maintenance of the appliance
Bad connection
Sensor fault
Contact the professional who takes care of
4
maintenance of the appliance
Bad connection
Sensor fault
Contact the professional who takes care of
4
maintenance of the appliance
No water circulation
Vent the air in the heating system
4
Check the circulation (direction, pump,
4
valves)
Check the water pressure
4
Bad connection
Sensor fault
Contact the professional who takes care of
4
maintenance of the appliance
No water circulation
Vent the air in the heating system
4
Check the circulation (direction, pump,
4
valves)
Check the water pressure
4
06/09/2010 - 300024828-001-A
MCA 45 - 65 - 90 - 115