Daikin Altherma 3 H HT ECH2 O Referenzhandbuch Für Den Monteur Seite 40

7 Faults and malfunctions
Error Code Component/Designation Error
number
8007 Pressure sensor DS
8100 Electrical components
9000
9001 80 Return flow temperature
sensor t
R2
9002 81 Feed temperature sensor
t or t
V1 V, BH
9003 89 Frost protection function
error
9004 7H FLS flow sensor
9005 8F Inflow temperature sensor
t
V, BH
9006 8H Inflow temperature sensor
t
V, BH
Installer reference guide
40
Possible error rectification
Water pressure in heating Warning message: Water pressure has exceeded permissible
system too high maximum value.
▪ Diaphragm expansion vessel defective or incorrect admission
pressure set.
▪ Check, replace.
▪ Parameter [Max pressure] setting too low.
▪ Set the parameter if necessary. If the setting is correct, drain
▪ Pressure sensor DS defective.
▪ Check, replace.
Communication Initialisation after heat pump start failed.
▪ Printed circuit board A1P defective.
▪ Check, replace.
Temporary internal mes- Not relevant for proper system operation.
sage
Return flow temperature Sensor or connecting cable defective.
sensor error
▪ Check, replace.
Flow sensor error Sensor or connecting cable defective.
▪ Check, replace.
Plate heat exchanger Measured value t
(PWT), outdoor unit
▪ Failure of the frost protection function for the plate heat ex-
changer because the water flow is too low. See error code
9004 / 7H.
▪ Failure of the frost protection function for the plate heat ex-
changer because there is a lack of refrigerant in the system. See
error code 9015 / E4.
Flow rate error Water flow rate is too low or non-existent.
Required minimum flow rate: see
Check the following items:
▪ All stop valves of the water circuit must be completely open.
▪ Optional water filters must not be contaminated.
▪ Heating system must run within its operating range.
▪ Heating system and internal circulation pump must be com-
pletely vented.
▪ On the controller, check that sufficient water pressure (> 0.5 bar)
is available. [→ Main menu → Information → Overview → Psyst]
▪ Check the function of the 3UVB1 3-way mixer valve: Compare
the actual position of 3UVB1 with the displayed position [→ Main
menu → Information → Overview → BPV].
▪ Does this fault occur during defrosting in room heating or hot wa-
ter preparation operating mode? With optional backup heater:
check its power supply and fuses.
▪ Check the fuses (pump fuse (FU1) on printed circuit board A1P
and the conductor plate fuse (F1) on printed circuit board RoCon
BM2C).
▪ Check the FLS flow sensor for soiling and function; clean, re-
place if necessary.
▪ Frost damage on the plate heat exchanger (outdoor unit)
Flow temperature tV, BH Feed temperature of backup heater (t
> 75 °C
▪ Feed temperature sensor is supplying incorrect values. Temper-
Flow temperature tV, BH ature sensor or connecting cable defective.
> 65 °C
▪ Check, replace.
▪ Contact problem, A1P jumper on X3A.
water to lower the system pressure.
< 0 °C
V1
Chap. 5
Heat pump (indoor unit) with integrated heat accumulator
) is too high.
V, BH
Daikin Altherma ETS(X/H)(B)-D
008.1447299_00 – 06/2019 – EN