DeDietrich MCA 45 User Manual page 43

MCA 45 - 65 - 90 - 115
Code Messages
BL.DT OUTL RET. Maximum difference between the
B07
B08 BL.RL OPEN
B09 BL.INV. L/N
B10 BL.BL INPUT
B11 OPEN
B13 BL. PCU COM
B14 BL.WATER MIS.
B15 BL.GAS PRESS
B16 BL.BAD SU
B17 BL.PCU ERROR
B18 BL.BAD PSU
B19 BL.NO CONFIG
B21 BL. COM SU
06/09/2010 - 300024828-001-A
Description
flow and return temperature
exceeded
The RL inlet on the PCU PCB
terminal block is open
Contact the professional who takes care of maintenance of the appliance
4
The BL inlet on the PCU PCB
terminal block is open
Communication error with the
SCU PCB
The water pressure is lower than
0,8 bar
Gas pressure too low
The SU PCB is not recognised
The parameters saved on the
PCU PCB are impaired
The PSU PCB is not recognised
The boiler has not been
configured
Communication error between
the PCU and SU PCBs
Checking / solution
The water flow in the installation is insufficient
Check the circulation (direction, pump, valves)
4
Check the water pressure
4
Sensor error
Contact the professional who takes care of maintenance of
4
the appliance
Parameter error
Contact the professional who takes care of maintenance of
4
the appliance
Bad connection
Contact the professional who takes care of maintenance of
4
the appliance
The contact connected to the BL inlet is open
Contact the professional who takes care of maintenance of
4
the appliance
Parameter error
Contact the professional who takes care of maintenance of
4
the appliance
Bad connection
Contact the professional who takes care of maintenance of
4
the appliance
Bad connection
Contact the professional who takes care of maintenance of
4
the appliance
SCU PCB not installed in the boiler
Contact the professional who takes care of maintenance of
4
the appliance
Not enough water in the circuit
Top up the installation with water
4
Incorrect setting of the gas pressure switch on the SCU PCB
Check that the gas valve is fully opened
4
Contact the professional who takes care of maintenance of
4
the appliance
Wrong SU PCB for this boiler
Contact the professional who takes care of maintenance of
4
the appliance
Parameter error on the PCU PCB
Contact the professional who takes care of maintenance of
4
the appliance
Wrong PSU PCB for this boiler
Contact the professional who takes care of maintenance of
4
the appliance
The PSU PCB has been changed
Contact the professional who takes care of maintenance of
4
the appliance
Bad connection
Contact the professional who takes care of maintenance of
4
the appliance
7. Troubleshooting
42