DeDietrich Innovens MCA 35 Installation And Service Manual page 116

8. Troubleshooting
Code Faults
D07 SYST.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
114
Cause Description
of the
fault
SCU System 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.
Checking / solution
Bad connection
Check whether the sensor is connected:
4
See chapter: "Deletion of sensors from the
memory in the PCB", page 116
Check the link and the connectors
4
Check that the sensor has been correctly fitted
4
Sensor fault
Check the Ohmic value of the sensor
4
Replace the sensor if necessary
4
Bad connection
Check whether the sensor is connected:
4
See chapter: "Deletion of sensors from the
memory in the PCB", page 116
Check the link and the connectors
4
Check that the sensor has been correctly fitted
4
Sensor fault
Check the Ohmic value of the sensor
4
Replace the sensor if necessary
4
Bad connection
Check whether the sensor is connected:
4
See chapter: "Deletion of sensors from the
memory in the PCB", page 116
Check the link and the connectors
4
Check that the sensor has been correctly fitted
4
Sensor fault
Check the Ohmic value of the sensor
4
Replace the sensor if necessary
4
Bad connection
Check the link and the connectors
4
Boiler module failure
Change the boiler module
4
Bad connection
Check whether the sensor is connected:
4
See chapter: "Deletion of sensors from the
memory in the PCB", page 116
Check the link and the connectors
4
Check that the sensor has been correctly fitted
4
Sensor fault
Check the Ohmic value of the sensor
4
Replace the sensor if necessary
4
MCA 35
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15/06/12 - 300022160-001-01