Daikin Altherma M ECH2O Series Installation And Maintenance Instructions Manual page 53

Code Malfunction /
error message
Display Internal
Evaporator over-
E9020 F3
temp
E9021 H3 HPS-System
E9022 H9 Fault AT sensor
E9023 HC Fault DHW sensor
Fault pressure
E9024 J1
sensor
E9025 J3 Return flow sensor
Suction pipe sen-
E9026 J5
sor
Aircoil sensor
E9027 J6
Defrost
E9028 J7 Aircoil sensor temp
Fault cold sensor
E9029 J8
OU
Daikin Altherma M ECH O
2
Solar storage tank with heating controller
008.1446799_00 – 07/2019 – EN
8
Component/
Designation
Outlet temperature sen-
– Outlet temperature sensor R2T on the refrigerant compressor
sor (hot gas sensor) R2T
on the heat pump out-
– Refrigerant compressor defective.
door unit refrigerant
compressor too high
– High-pressure switch S1PH defective.
High-pressure switch
– Main circuit board in the heat pump outdoor unit defective.
S1PH in the heat pump
– Wiring, poor contact.
outdoor unit
Outside temperature
sensor R1T in the heat
pump outdoor unit
Storage tank tempera-
ture sensor t
DHW
Pressure sensor S1NPH
in the heat pump outdoor
unit
Outlet temperature sen-
sor R2T in the heat
pump outdoor unit
Intake temperature sen-
Sensor or connecting cable defective.
sor R3T in the heat
● Check, replace.
pump outdoor unit
Temperature sensor of
fin heat exchanger R5T
in the heat pump outdoor
unit
Temperature sensor of
fin heat exchanger R4T
in the heat pump outdoor
unit
Fluid side temperature
sensor R6T in the heat
pump outdoor unit
x Errors, malfunctions and messages
Causes and possible fault elimination
or connecting cable defective.
● Check, replace.
● Check, replace.
Installation and maintenance instructions
53