Daikin EKHHP300AA2V3 Installation And Maintenance Manual

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6 x Malfunctions and fault codesDAIKIN EKHHP(3/5)00AA2V3DAIKIN Hot water heat pump008.1423444_02 – 09/2015Installation and maintenance manual316.2 Fault codesThe electronic controller of the DAIKIN EKHHP shows errorcodes on the display. In addition to the error code, the LED on thecontroller flashes (see fig. 6-1).To delete the error code:● Press key for at least 5 s.If the error arises again:● Testing and repair by a DAIKIN heating expert.Tab. 6-2 Possible error codes on the controller of DAIKIN EKHHP1 Error code2 Flashing LEDFig. 6-1 Error displayFault code Component/DesignationA1 PCB fault EKHHPA5 Refrigerant temperature too highAC STL Booster heater (BOH)E1 PCB in the external heat pump deviceE6 Refrigerant compressor blockedE7 Fan block in the external heat pump unitE8 Flow rate too high in heat pump external unitEC Temperature in internal hot water tank is too highF3 The discharge temperature from the heat ex-changer of the external heat pump unit is too highH0 Sensor refrigerant circuitH6 Position sensor refrigerant compressorH9 Temperature sensor external temperatureHC Hot water storage tank temperature sensorJ3 Temperature sensor discharge refrigerant com-pressorL3 Electrical componentsL4 Temperature heat exchanger heat pump externalunit too highL5 Electrical componentsP4 Sensor heat exchanger heat pump external unitdefectiveU0 Refrigerant lossU2 Power supply interruptedU4 Faulty communication heat pump internal unit /heat pump external unitU5 Communication error regulatorUA No communication heat pump internal unit / heatpump external unit