8
Faults and malfunctions
Installation and maintenance instructions
49
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
E9036 Temperature sensor R10T
on inverter circuit board in
the heat pump outdoor unit
(only in 11 -16 kW system)
Electrically defective
Overtemperature in the heat pump outdoor unit
▪ Inverter circuit board in the heat pump outdoor
unit defective.
▪ Temperature sensor on inverter circuit board de-
fective, plug connection X111A not correct.
▪ Check, eliminate cause, replace.
▪ If necessary, contact a service technician.
E9037 Output setting
Output setting for heat pump outdoor unit incorrect
▪ Contact a service technician.
E9038 Sensors and parameter set-
tings in the heat pump out-
door unit
Refrigerant leak
Refrigerant loss.
▪ Refrigerant quantity too low. See fault code
E9015 / E4.
▪ Blockage or leak in refrigerant line.
▪ Check, eliminate cause, top up refrigerant.
E9039
Undervoltage/overvoltage
Mains voltage outside the permissible range
▪ Sporadic fault shortly after a power failure.
▪ No fault elimination necessary.
▪ Inverter circuit board in the heat pump outdoor
unit defective.
▪ Check, replace.
▪ If necessary, contact a service technician.
E9041 Transmission fault
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.
E9042
Communication between the A1P printed circuit
board and RoCon BM2C lost.
▪ See fault code E200.
E9043
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.
E9044
Configuration of the A1P printed circuit board does
not match the heat pump outdoor unit
▪ Replace A1P printed circuit board.
▪ If necessary, contact a service technician.
E9045 Software
Hot water heating time
DHW heating > 6 hours
▪ Check the heating element.
▪ Check that the power supply meets the regula-
tions. 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 circuit board match.
Summary of Contents for Altherma 3 ECH2O
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