DeDietrich Innovens MCA 25 BIC User Manual page 37

MCA 25/28 BIC
Code Faults
L07 BACK S.FAILURE
L08 BACK S.FAILURE
L09 STB BACK
L10 DEP-RET>MAX
L11 RET-DEP>MAX
L12 STB OPEN
15/06/12 - 300022162-001-01
Cause Description
of the
fault
PCU The return temperature sensor is on
an open circuit
PCU Return temperature too low
PCU Return temperature too high
PCU Difference between the flow and
return temperatures insufficient
PCU Difference between the flow and
return temperatures too great
PCU Maximum boiler temperature
exceeded (STB thermostat
maximum)
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
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
No water circulation
Vent the air in the heating system
4
Check the circulation (direction, pump,
4
valves)
Check the water pressure
4
6. Troubleshooting
36