![background image](http://html.mh-extra.com/html/daikin/altherma-eblq05c2v3/altherma-eblq05c2v3_installation-and-maintenance-instructions-manual_501251052.webp)
8
x
Errors, malfunctions and messages
Installation and maintenance instructions
52
Daikin Altherma M ECH
2
O
Solar storage tank with heating controller
008.1446799_00 – 07/2019 – EN
E9009
AA
STB fault
Optional: STB backup
heater (EKBUxx)
Thermal contactor (STB) in the backup heater (EKBUxx) has trig-
gered.
●
Replace backup heater (EKBUxx).
E9010
AC
Software
Thermal contactor activated (water temperature >
85
°C)
E9011
C0
Fault flow sensor
Flow sensor FLS or flow
switch (outdoor unit)
Flow sensor FLS or flow switch defective.
●
Replace flow sensor FLS.
●
Replace flow switch.
E9012
C4
Fault feed flow
sensor
Feed temperature sen-
sor t
V1
(outdoor unit) or
t
V,
BH
Measured value outside of the permissible value range. Sensor or
connecting cable defective.
●
Check, replace.
E9013
E1
OU main board def
Heat pump outdoor unit
main circuit board
– Main circuit board in the heat pump outdoor unit defective.
– Fan motor defective.
●
Check, replace.
E9014
E3
Coolant over-pres-
sure
High-pressure switch
S1PH in the refrigerant
system (outdoor unit)
Pressure in refrigerant system is too high.
– High-pressure switch S1PH or fan motor defective.
●
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 service valves.
E9015
E4
Coolant under-
pressure
Pressure sensor S1NPH
in the heat pump outdoor
unit
Pressure in refrigerant system too low.
– Refrigerant quantity too low.
●
Check, eliminate cause, top up refrigerant.
– Pressure sensor S1NPH in the heat pump outdoor 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
E5
Load protec comp
Electronic overload pro-
tection in the refrigerant
compressor (outdoor
unit)
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.
– Inverter circuit board in the heat pump outdoor unit defective.
– Refrigerant compressor / inverter circuit board wiring, poor con-
tact.
– Filled refrigerant quantity too high.
●
Check, replace.
– Service valves in the heat pump outdoor unit not open.
●
Open service valves.
E9017
E7
Fan blocked
Fan motor in the heat
pump outdoor unit
– A fan in the heat pump outdoor unit is blocked.
●
Check fan for presence of dirt or blockages; if necessary,
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
E9
Expansion valve
Electronic expansion
valve (outdoor unit)
– The electronic expansion valve in the heat pump outdoor unit is
defective.
●
Check, replace.
E9019
EC
Hot water temper-
ature >
85 °C
Storage tank tempera-
ture sensor t
DHW
The storage tank temperature sensor t
DHW
delivers a temperature
value >
85 °C.
– Sensor or connecting cable defective.
●
Check, replace.
Code
Malfunction /
error message
Component/
Designation
Causes and possible fault elimination
Display Internal