DeDietrich MCA 15 User Manual page 38

6. Troubleshooting
Code Faults
D03 OUTL S.B FAIL.
D04 OUTL S.C FAIL.
D05 OUTSI.S.FAIL.
D07 AUX.SENS.FAIL.
D09 DHW S.FAILURE
D11 ROOM S.A FAIL.
D12 ROOM S.B FAIL.
D13 ROOM S.C FAIL.
D14 MC COM.FAIL
D15 ST.TANK S.FAIL
D16 SWIM.P.B. S.FAIL
D16 SWIM.P.C. S.FAIL
D17 DHW 2 S.FAIL
37
Cause Description
of the
fault
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.
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.
SCU Auxiliary sensor fault
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.
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.
SCU Communication failure between the
SCU PCB and the boiler radio
module
SCU Storage tank sensor fault
Note:
The hot water storage tank
reheating operation is no longer
assured.
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.
SCU Sensor fault tank 2
MCA 15 - MCA 25 MCA 25/28 MI
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
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
Bad connection
Check the link and the connectors
4
Boiler module failure
Change the boiler module
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
23/08/2011 - 300024159-001-B