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De Dietrich HPI - AWHP MIT-IN iSystem Manual

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Code Messages Description Checking / solution
B09 BL.BL INPUT OPEN
The BL inlet on the PCU PCB
terminal block is open. Antifreeze
protection.
The contact connected to the BL inlet is open.
4 Contact the professional who takes care of
maintenance of the appliance.
Parameter error.
4 Contact the professional who takes care of
maintenance of the appliance.
Bad connection.
4 Contact the professional who takes care of
maintenance of the appliance.
B10 BL.GROUP.EXT.
Failure outside unit.
4 Contact the professional who takes care of
maintenance of the appliance.
B11 BL.COM SCU
Communication error with the
SCU PCB.
4 Contact the professional who takes care of
maintenance of the appliance.
B12 BL.WATER MIS.
The water pressure is lower than
0,5 bar
Not enough water in the circuit.
4 Top up the installation with water.
B13 BL.DHW. S.
The DHW tank sensor is
disconnected or short circuited
Bad connection.
4 Contact the professional who takes care of
maintenance of the appliance.
B14 BL.OUTSIDE.S
The outside temperature sensor is
disconnected or short circuited.
Bad connection.
4 Contact the professional who takes care of
maintenance of the appliance.
B17 BL.PCU ERROR
The parameters saved on the
PCU PCB are impaired.
Parameter error on the PCU PCB.
4 Contact the professional who takes care of
maintenance of the appliance.
B18 BL.BAD PSU
The PSU PCB is not recognised Wrong PSU PCB for this heat pump.
4 Contact the professional who takes care of
maintenance of the appliance.
B19 BL.NO CONFIG
The inside module has not been
configured.
The PSU PCB has been changed.
4 Contact the professional who takes care of
maintenance of the appliance.
B39 BL.FLOW
Low flow rate.
4 Contact the professional who takes care of
maintenance of the appliance.
B40 BL.FLOW.STOP
Flow rate fault.
4 Contact the professional who takes care of
maintenance of the appliance.
B41 BL.COM.CPT.kWh
Communication error with the
energy meter option PCB.
Bad connection.
4 Contact the professional who takes care of
maintenance of the appliance.
B50 BL.S.DEP.CPT.kWh
Energy meter flow sensor error. Bad connection.
4 Contact the professional who takes care of
maintenance of the appliance.
B51 BL.S.RET.CPT.kWh
Energy meter return sensor error. Bad connection.
4 Contact the professional who takes care of
maintenance of the appliance.
B52 BL.CPT.kWh.ELEC1
Electical meter ELEC 1 error. Bad connection.
4 Contact the professional who takes care of
maintenance of the appliance.
B53 BL.CPT.kWh.ELEC2
Electical meter ELEC 2 error. Bad connection.
4 Contact the professional who takes care of
maintenance of the appliance.
B54 BL.CPT.kWh.THERM
Thermal meter error. Bad connection.
4 Contact the professional who takes care of
maintenance of the appliance.
B55 BL.FLOW
Low flow rate.
4 Contact the professional who takes care of
maintenance of the appliance.
5. Troubleshooting AWHP MIT-IN iSystem
25
09/01/13 - 300027618-001-02
… 26 …


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