Owner's manual

Code Messages Description Checking / solution
B6 BL.S.ECH.HP
Heat pump exchanger sensor
error.
Bad connection.
4 Contact the professional who takes care of maintenance
of the appliance.
B7 BL.S.BAT.HP
Heat pump battery sensor error. Bad connection.
4 Contact the professional who takes care of maintenance
of the appliance.
B8 BL.BL INPUT OPEN
The BL inlet on the PCU PCB
terminal block is open. No
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.
B9 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.
B15 BL.PRES.HIGH
High pressure error on the heat
pump.
4 Contact the professional who takes care of maintenance
of the appliance.
B16 BL.PRES.LOW
Low-pressure error on the heat
pump.
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.
B21 BL.COM.HPC
Loss of communication with the
heat pump.
4 Check the power to the thermodynamic unit.
4 Contact the professional who takes care of maintenance
of the appliance.
B22 BL.COMP.HP
Compressor fault.
4 Contact the professional who takes care of maintenance
of the appliance.
MIT iSystem 5. Troubleshooting
24/05/2012 - 300028952-001-01
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