Daikin Altherma 3 ECH2O - Page 46

8 Faults and malfunctions
Installation and maintenance instructions
46
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
E9014 High-pressure switch S1PH
in the refrigerant system
P
refrigerant
high Pressure in refrigerant system is too high.
▪ High-pressure switch S1PH or fan motor defect-
ive.
▪ Check, replace.
▪ Poor wiring contact.
▪ Flow rate in the heating system too low.
▪ Filled refrigerant quantity too high.
▪ Check, replace.
▪ Service valves in the heat pump outdoor unit not
open.
▪ Open the service valves.
E9015 Pressure sensor S1NPH in
the heat pump outdoor unit
P
refrigerant
low Pressure in refrigerant system too low.
▪ Refrigerant quantity too low.
▪ Check, eliminate cause, top up refrigerant.
▪ Pressure sensor S1NPH in the heat pump out-
door unit defective.
▪ Temperature sensor of fin heat exchanger R4T in
the heat pump outdoor unit defective.
▪ Solenoid valve in the heat pump outdoor unit not
opening.
▪ Main circuit board in the heat pump outdoor unit
defective.
▪ Check, replace.
E9016 Electronic overload protec-
tion in the refrigerant com-
pressor
Compressor load protection Refrigerant compressor overload protection has
triggered. Pressure difference in the refrigerant cir-
cuit between high and low pressure side too high
(>26bar).
▪ Refrigerant compressor defective.
▪ Inverter circuit board in the heat pump outdoor
unit defective.
▪ Refrigerant compressor/inverter circuit board wir-
ing, poor contact.
▪ Filled refrigerant quantity too high.
▪ Check, replace.
▪ Service valves in the heat pump outdoor unit not
open.
▪ Open the service valves.
E9017 Fan motor in the heat pump
outdoor unit
Ventilator blocked
▪ A fan in the heat pump outdoor unit is blocked.
▪ Check the fan for dirt or blockages; if neces-
sary, clean and free up.
▪ Fan motor defective.
▪ Fan motor wiring, poor contact.
▪ Overvoltage at fan motor.
▪ Fuse in the heat pump outdoor unit defective.
▪ Inverter circuit board in the heat pump outdoor
unit defective.
▪ Check, replace.
E9018 Electronic expansion valve Expansion valve The electronic expansion valve in the heat pump
outdoor unit is defective, replace.
E9019 Storage tank temperature
sensor t
DHW2
Hot water temperature >85°C The storage tank temperature sensor t
DHW2
delivers
a temperature value >85°C.
Sensor or connecting cable defective.
▪ Check, replace.
E9020 Outlet temperature sensor
(hot gas sensor) R2T on
the heat pump outdoor unit
refrigerant compressor too
high
T
Evaporator
high
▪ Outlet temperature sensor R2T on the refrigerant
compressor or connecting cable defective.
▪ Refrigerant compressor defective.
▪ Check, replace.