8
Faults and malfunctions
Installation and maintenance instructions
50
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
E9046 Software
Compressor start-up
System detects an abnormal electricity wave shape
16 times in 5 min
▪ Check that the power supply meets the regula-
tions. Check for frequency fluctuations.
▪ 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.
▪ After resetting the power supply, check if the error
occurs when the compressor is not in operation:
check the expansion valve.
E9047 Software
Overvoltage
System detects an overcurrent of > 20 A to the com-
pressor for > 2.5 seconds 16x in 5 min
▪ 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 power transistor.
▪ 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 that the power supply meets the regula-
tions. Check for frequency fluctuations.
E9048 4-way valve
4-way valve
The following condition occurs for 10 min after oper-
ation for 5 min:
Heating: Temperature of the condenser negative
outlet water temperature < -10 °C
▪ Check the thermistor for the outlet water in the
heat exchanger.
▪ Check the thermistor for the refrigerant fluid side.
▪ 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 4-way valve coil/wiring harness.
▪ Check the 4-way valve body.
▪ Check for insufficient refrigerant. Perform a leak
test.
▪ Check the quality of the refrigerant.
▪ Check the shut-off valves.
▪ Check that the hydro printed circuit board is being
supplied with voltage.
Summary of Contents for Altherma 3 ECH2O
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