Daikin Altherma 3 ECH2O - Page 48

8 Faults and malfunctions
Installation and maintenance instructions
48
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
E9030 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.
▪ Very high outside temperature.
▪ Insufficient cooling of the inverter board.
▪ Air intake dirty/blocked.
▪ 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.
E9031 Electrical components over-
voltage fault
If the error occurs <15x, the functional safety of the
indoor unit is still guaranteed.
▪ Sporadic message during continuous self-monit-
oring by the device.
▪ No further measures are required.
If the fault occurs 15x, it is locked and may have the
following causes:
▪ Current mains overvoltage.
▪ Refrigerant compressor blocked or defective.
▪ Inverter circuit board in the heat pump outdoor
unit defective.
▪ Wiring, poor contact.
▪ Service valves in the heat pump outdoor unit not
open.
▪ Check, eliminate cause, replace.
▪ If necessary, contact a service technician.
E9032 Electrical components
▪ Refrigerant compressor defective.
▪ Inverter circuit board in the heat pump outdoor
unit defective.
▪ Check, replace.
▪ If necessary, contact a service technician.
E9033
▪ Refrigerant compressor blocked or defective.
▪ Pressure difference between high and low pres-
sure side too high before starting refrigerant com-
pressor.
▪ Service valves in the heat pump outdoor unit not
open.
▪ Check, eliminate cause, replace.
▪ If necessary, contact a service technician.
E9034 Communication fault – internal communication in
the heat pump outdoor unit lost.
▪ Electromagnetic influences.
▪ Perform reset.
▪ Main circuit board in the heat pump outdoor unit
defective.
▪ Inverter circuit board in the heat pump outdoor
unit defective.
▪ Fan motor defective.
▪ Wiring, poor contact.
▪ Check, eliminate cause, replace.
▪ If necessary, contact a service technician.
E9035 Inverter circuit board in the
heat pump outdoor unit
AG circuit board defective No supply voltage from the mains connection.
▪ Inverter circuit board in the heat pump outdoor
unit defective.
▪ Check, eliminate cause, replace.
▪ If necessary, contact a service technician.