Daikin Altherma 3 ECH2O - Page 51

8 Faults and malfunctions
Installation and maintenance instructions
51
Daikin Altherma EHS(X/H)(B)-D
Heat pump (indoor unit) with integrated heat accumulator
008.1444099_01 – 11/2018 – EN
Code Component/Designation Error Possible fault rectification
E9049 Temperature sensor on the
evaporator
Cooling high pressure The temperature measured by the temperature
sensor on the fin heat exchanger exceeds 60°C
▪ Check that the installation room meets the regula-
tions.
▪ Check the fan.
▪ Check the fan motor's connection and wiring.
▪ Check the expansion valve.
▪ Check the outer inverter conductor plate.
▪ Check that the current flow LED flashes at regular
intervals.
▪ Check that the correct replacement part has been
installed.
▪ Check that the outer main conductor plate is re-
ceiving a power supply.
▪ Check the shut-off valves.
▪ Check the heat exchanger.
▪ Check the temperature sensor on the fin heat ex-
changer.
▪ Check the quality of the refrigerant.
E9050 Software Voltage/current sensor Power supply condition malfunction detected before
or directly after the compressor starts up
▪ Check the compressor.
▪ Check the compressor's connection and wiring.
▪ Check the operation of the expansion valve (fluid
return flow).
▪ Check the refrigerant filling capacity and check for
leaks.
▪ Check the outer inverter conductor plate.
▪ Check that the current flow LED flashes at regular
intervals.
▪ Check that the correct replacement part has been
installed.
▪ Check that the outer main conductor plate is re-
ceiving a power supply.
E9052 Software Compressor system Compressor operating frequency below 55Hz,
voltage below 0.1V and input current below 0.5A
▪ Check the compressor.
▪ Check the compressor's connection and wiring.
▪ Check the operation of the expansion valve (fluid
return flow).
▪ Check the refrigerant filling capacity and check for
leaks.
▪ Check that the power supply meets the regula-
tions. Check for frequency fluctuations.
▪ Check the outer inverter conductor plate.
▪ Check that the current flow LED flashes at regular
intervals.
▪ Check that the correct replacement part has been
installed.
E9053 Pressure sensor Refrigerant pressure sensor Pressure sensor detects an abnormal value for
3minutes (>4.5MPa or <-0.05MPa)
▪ Check the pressure sensor.
▪ Check that the current flow LED flashes at regular
intervals.
▪ Check that the correct replacement part has been
installed.
▪ Check that the outer main conductor plate is re-
ceiving a power supply.
E9054