Daikin Altherma 3 H HT ECH2 O Referenzhandbuch Für Den Monteur Seite 44

7 Faults and malfunctions
Error Code Component/Designation Error
number
9039 U2
9041 U4 Transmission fault
9042 U5 Transmission fault
9043 U7 Transmission fault
9044 UA Transmission fault
9045 AJ-03 Software
9046 E6-00 Software
Installer reference guide
44
Possible error rectification
Undervoltage/overvoltage Mains voltage outside the permissible range
▪ Sporadic error shortly after a power failure.
▪ No fault elimination necessary.
▪ Inverter circuit board in the heat pump outdoor unit defective.
▪ Check, replace.
▪ If necessary, contact service partner.
Electrical components Communication between the heat pump outdoor unit and heat
pump indoor unit lost.
▪ Wiring or connections, poor contact.
▪ No heat pump outdoor unit connected.
▪ Printed circuit board A1P defective.
▪ Main circuit board in the heat pump outdoor unit defective.
▪ Check, replace.
Electrical components Communication between RoCon BM2C and printed circuit board
A1P is lost.
▪ See error code 200.
Electrical components Communication between the main circuit board and inverter circuit
board in the heat pump outdoor unit lost.
▪ Main circuit board in the heat pump outdoor unit defective.
▪ Inverter circuit board in the heat pump outdoor unit defective.
▪ Wiring, poor contact.
▪ Check, eliminate cause, replace.
Electrical components Configuration of the A1P printed circuit board does not match the
heat pump outdoor unit
▪ Replace A1P printed circuit board.
▪ If necessary, contact service partner.
Hot water heating time DHW heating > 6 hours
▪ Check the heating element.
▪ Check that the power supply meets the regulations. Check for
frequency fluctuations.
▪ Check the fuses on the printed circuit boards.
▪ Check DHW consumption (poss. too high).
▪ Check the building's DHW tap.
▪ Confirm that the software and EEPROM on the hydro printed cir-
cuit board match.
Compressor start-up System detects an abnormal electricity wave shape 16 times in
5 min
▪ Check that the power supply meets the regulations. 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.
Daikin Altherma ETS(X/H)(B)-D
Heat pump (indoor unit) with integrated heat accumulator
008.1447299_00 – 06/2019 – EN