Owner's manual

Code Messages Description Checking / solution
B23 BL.V4V HP
Heat pump 4 way valve error.
4 Check that there is not an inversion between the flow
and return for the heating circuit.
4 Contact the professional who takes care of maintenance
of the appliance.
B24 BL.HW. PUMP
Flow rate error between the heat
pump and MIT.
B25 BL.S.OUTLET.COMP
Compressor outlet temperature
sensor error.
B26 BL.OFF LIMIT1
Under the lower operating limit.
4 Check the external temperatures are suitable for the
thermodynamic unit.
4 Contact the professional who takes care of maintenance
of the appliance.
B27
BL.OFF LIMIT3
Under the lower operating limit.
B28 FLOW FAIL. 6
Exchanger frozen.
4 Contact the professional who takes care of maintenance
of the appliance.
B29 FLOW FAIL. 8
Exchanger frozen.
4 Contact the professional who takes care of maintenance
of the appliance.
B30 BL.COM.HP
No 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.
B31 BL.EEPROM CPU
Erro EEPROM on the heat pump
PCB.
4 Switch-off and then restart the thermodynamic unit.
4 Contact the professional who takes care of maintenance
of the appliance.
B32 BL.CIRC.COLD
Fault on the cold circuit.
4 Display menu (#MESSAGE HISTORIC)
B33 BL.HOT GAS
Hot gas fault.
4 Contact the professional who takes care of maintenance
of the appliance.
B34 BL.MOT.PROT.
Primary pump motor error.
4 Contact the professional who takes care of maintenance
of the appliance.
B35 BL.ANTI CC
Anti-hunting.
4 Display in short-cycle period: Check the installation's
volume.
4 Contact the professional who takes care of maintenance
of the appliance.
4 Display outside short-cycle period: Wait 5 minutes.
B37 BL.BIOS
Heat pump control system PCB
error.
4 Switch-off and then restart the thermodynamic unit.
4 Contact the professional who takes care of maintenance
of the appliance.
B38 BL.CONFIG
Heat pump control system PCB
coding error.
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.
5. Troubleshooting MIT iSystem
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24/05/2012 - 300028952-001-01