Daikin Altherma 3 ECH2O - Page 45

8 Faults and malfunctions
Installation and maintenance instructions
45
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
E9004 FLS flow sensor Flow rate error Water flow is too low or non-existent.
Required minimum flow rate: see Chap. 5
Check the following items:
▪ All stop valves of the water circuit must be com-
pletely open.
▪ Optional water filters must not be contaminated.
▪ Heating system must run within its operating
range.
▪ Heating system and internal circulation pump
must be completely vented.
▪ On the controller, check that sufficient water pres-
sure (>0.5bar) is available. [→Main menu →In-
formation → Overview →Psyst]
▪ Check the function of the 3-way switching valve
3UVB1: Compare the actual position of 3UVB1
with the indicated position [→Main menu →In-
formation → Overview →BPV].
▪ Does this fault occur during defrosting in room
heating or domestic hot water preparation operat-
ing mode? With optional backup heater: check its
power supply and fuses.
▪ Check the fuses (pump fuse (FU1) on the A1P
printed circuit board and PCB fuse(F1) on the
RoCon BM2C printed circuit board).
▪ Check the FLS flow sensor for soiling and func-
tion; clean, replace if necessary.
▪ Frost damage on the plate heat exchanger (out-
door unit)
E9005 Inflow temperature sensor
t
V, BH
Inflow temperature t
V, BH
>75°C Feed temperature of backup heater (t
V, BH
) is too
high.
▪ Inflow temperature sensor providing incorrect val-
ues. Temperature sensor or connecting cable de-
fective.
▪ Check, replace.
▪ Contact problem, A1P jumper on X3A.
E9006 Inflow temperature sensor
t
V, BH
Inflow temperature t
V, BH
>65°C
E9007 Circuit board A1P IG circuit board defective Communication between the heat pump outdoor
unit and heat pump indoor unit lost.
▪ Electromagnetic influences.
▪ Perform reset.
▪ Printed circuit board A1P defective.
▪ Replace A1P printed circuit board.
E9008 Temperature sensor (refri-
gerant fluid side) t
L2
Refrigerant temperature outside the valid range No heat consumption at the plate heat exchanger.
▪ Check the flow rate.
▪ If the flow rate is OK, replace the refrigerant tem-
perature sensor.
E9009 Optional: STB backup
heater (EKBUxx)
STB fault Thermal contactor (STB) in the backup heater (EK-
BUxx) has triggered.
▪ Check and unlock the position of the STB.
E9010 Jumper on A1P circuit
board
Jumper missing on the "X21A" connection socket of
the A1P circuit board.
▪ Install the jumper.
E9011 FLS flow sensor Flow sensor error FLS flow sensor defective.
▪ Replace the FLS flow sensor.
E9012 Refrigerant temperature
sensor
Refrigerant temperature sensor error Measured value outside the permissible value
range. Sensor or connecting cable defective.
▪ Check, replace.
E9013 Heat pump outdoor unit
main circuit board
AG circuit board defective
▪ Main circuit board in the heat pump outdoor unit
defective.
▪ Fan motor defective.
▪ Check, replace.