DeDietrich Innovens MCA 25 BIC User Manual page 39

MCA 25/28 BIC
Code Faults
L40 TEST.HRU.FAIL
L250 DEF.WATER MIS.
L251 MANOMETRE FAIL PCU
D03 OUTL S.B FAIL.
D04 OUTL S.C FAIL.
D05 OUTSI.S.FAIL.
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
15/06/12 - 300022162-001-01
Cause Description
of the
fault
PCU HRU/URC unit test error
PCU The water pressure is too low
Fault on the water pressure sensor
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 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
Checking / solution
Bad connection
External cause
Parameter incorrectly set
Contact the professional who takes care of
4
maintenance of the appliance
Hydraulic circuit incorrectly vented
Water leak
Measurement error
Top up with more water if necessary
4
Reset the boiler
4
Wiring problem
The manometer is defective
Sensor pcb defective
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
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
6. Troubleshooting
38