DE DIETRICH INNOVENS MCA 15 - MCA 25 - MCA 25_28 MI - Manual (Page 38)

Code Faults Cause
of the
fault Description Checking / solution
D03
D04 OUTL S.B FAIL.
OUTL S.C FAIL. SCU Circuit B flow sensor fault
Circuit C flow sensor fault
Remarks:
The circuit pump is running.
The 3-way valve motor on the circuit
is no longer powered and can be
adjusted manually.
Bad connection
Sensor fault
4 Contact the professional who takes care of
maintenance of the appliance
D05 OUTSI.S.FAIL. SCU Outside temperature sensor fault
Remarks:
The boiler operates on BOILER
MAX
temperature.
The valve setting is no longer
ensured but monitoring the
maximum temperature of the circuit
after the valve is ensured.
Valves may be manually operated.
Reheating the domestic hot water
remains ensured.
Bad connection
Sensor fault
4
Contact the professional who takes care of
maintenance of the appliance
D07 AUX.SENS.FAIL. SCU Auxiliary sensor fault Bad connection
Sensor fault
4
Contact the professional who takes care of
maintenance of the appliance
D09 DHW S.FAILURE SCU Domestic hot water sensor fault
Remarks:
Heating of domestic hot water is no
longer ensured.
The load pump operates.
The load temperature of the dhw
tank is the same as the boiler.
Bad connection
Sensor fault
4
Contact the professional who takes care of
maintenance of the appliance
D11
D12
D13 ROOM S.A FAIL.
ROOM S.B FAIL.
ROOM S.C FAIL. SCU A room temperature sensor fault
B room temperature sensor fault
C room temperature sensor fault
Note:
The circuit concerned operates
without any influence from the room
sensor.
Bad connection
Sensor fault
4 Contact the professional who takes care of
maintenance of the appliance
D14 MC COM.FAIL SCU Communication failure between the
SCU PCB and the boiler radio
module
Bad connection
4 Check the link and the connectors
Boiler module failure
4 Change the boiler module
D15 ST.TANK S.FAIL SCU Storage tank sensor fault
Note:
The hot water storage tank
reheating operation is no longer
assured.
Bad connection
Sensor fault
4
Contact the professional who takes care of
maintenance of the appliance
D16
D16 SWIM.P.B. S.FAIL
SWIM.P.C. S.FAIL SCU Swimming pool sensor fault circuit
B
Swimming pool sensor fault circuit
C
Note:
Swimming pool reheating is always
done during the circuit's comfort
period.
Bad connection
Sensor fault
4 Contact the professional who takes care of
maintenance of the appliance
D17 DHW 2 S.FAIL SCU Sensor fault tank 2 Bad connection
Sensor fault
4
Contact the professional who takes care of
maintenance of the appliance
6. Troubleshooting MCA 15 - MCA 25 MCA 25/28 MI
37 23/08/2011 - 300024159-001-B