8
Faults and malfunctions
Installation and maintenance instructions
49
Daikin Altherma EHS(X/H)
Daikin Altherma integrated solar unit
008.1444099_00 – 07/2018 – EN
Code
Component/Designation
Error
Possible fault rectification
E9036 Temperature sensor R10T
on inverter circuit board in
the heat pump outdoor unit
(only in 1116 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
WW heating time
WW 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 WW consumption (poss. too high).
▪ Check the building's WW tap.
▪ Confirm that the software and EEPROM on the
hydro printed circuit board match.
