Daikin Altherma M ECH2O Series Installation And Maintenance Instructions Manual page 52

8 x Errors, malfunctions and messages
Code Malfunction /
error message
Display Internal
E9009 AA
STB fault
E9010 AC
E9011 C0 Fault flow sensor
Fault feed flow
E9012 C4
sensor
E9013 E1 OU main board def
Coolant over-pres-
E9014 E3
sure
Coolant under-
E9015 E4
pressure
E9016 E5 Load protec comp
E9017 E7 Fan blocked
E9018 E9 Expansion valve
Hot water temper-
E9019 EC
ature > 85 °C
Installation and maintenance instructions
52
Component/
Designation
Thermal contactor (STB) in the backup heater (EKBUxx) has trig-
Optional: STB backup
gered.
heater (EKBUxx)
● Replace backup heater (EKBUxx).
Software Thermal contactor activated (water temperature > 85 °C)
Flow sensor FLS or flow switch defective.
Flow sensor FLS or flow
● Replace flow sensor FLS.
switch (outdoor unit)
● Replace flow switch.
Measured value outside of the permissible value range. Sensor or
Feed temperature sen-
connecting cable defective.
sor t (outdoor unit) or
V1
t
● Check, replace.
V, BH
– Main circuit board in the heat pump outdoor unit defective.
Heat pump outdoor unit
– Fan motor defective.
main circuit board
Pressure in refrigerant system is too high.
– High-pressure switch S1PH or fan motor defective.
High-pressure switch
– Poor wiring contact.
S1PH in the refrigerant
– Flow rate in the heating system too low.
system (outdoor unit)
– Filled refrigerant quantity too high.
– Service valves in the heat pump outdoor unit not open.
Pressure in refrigerant system too low.
– Refrigerant quantity too low.
Pressure sensor S1NPH
– Pressure sensor S1NPH in the heat pump outdoor unit defective.
in the heat pump outdoor
– Temperature sensor of fin heat exchanger R4T in the heat pump
unit
– Solenoid valve in the heat pump outdoor unit not opening.
– Main circuit board in the heat pump outdoor unit defective.
Refrigerant compressor overload protection has triggered. Pressure
difference in the refrigerant circuit between high and low pressure
side too high (> 26 bar).
– Refrigerant compressor defective.
Electronic overload pro-
– Inverter circuit board in the heat pump outdoor unit defective.
tection in the refrigerant
– Refrigerant compressor / inverter circuit board wiring, poor con-
compressor (outdoor
unit)
– Filled refrigerant quantity too high.
– Service valves in the heat pump outdoor unit not open.
– A fan in the heat pump outdoor unit is blocked.
– Fan motor defective.
Fan motor in the heat
– Fan motor wiring, poor contact.
pump outdoor unit
– Overvoltage at fan motor.
– Fuse in the heat pump outdoor unit defective.
– Inverter circuit board in the heat pump outdoor unit defective.
– The electronic expansion valve in the heat pump outdoor unit is
Electronic expansion
valve (outdoor unit)
The storage tank temperature sensor t
value > 85 °C.
Storage tank tempera-
ture sensor t
– Sensor or connecting cable defective.
DHW
Causes and possible fault elimination
● Check, replace.
● Check, replace.
● Check, replace.
● Open service valves.
● Check, eliminate cause, top up refrigerant.
outdoor unit defective.
● Check, replace.
tact.
● Check, replace.
● Open service valves.
● Check fan for presence of dirt or blockages; if necessary,
clean and free up.
● Check, replace.
defective.
● Check, replace.
● Check, replace.
delivers a temperature
DHW
Daikin Altherma M ECH O
2
Solar storage tank with heating controller
008.1446799_00 – 07/2019 – EN