DeDietrich MCA 45 User Manual page 49

MCA 45 - 65 - 90 - 115
Code Faults
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
D27 PCU COM. FAIL
06/09/2010 - 300024828-001-A
Cause Description
of the
error
SCU Fault external sensor
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 failure
SCU Domestic hot water sensor failure
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 Fault room temperature sensor A
Fault room temperature sensor B
Fault room temperature sensor C
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 failure
Note:
The hot water storage tank
reheating operation is no longer
assured.
SCU Swimming pool sensor failure circuit
B
Swimming pool sensor failure circuit
C
Note:
Pool reheating is independent of its
temperature.
SCU Sensor failure tank 2
SCU Communication failure between the SCU and PCU PCBs
Contact the professional who takes care of maintenance of the appliance
4
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
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
7. Troubleshooting
48