Daikin Altherma EHSX04P50D Installations- Und Wartungsanleitung Seite 47

Code Component/Designation
E9004 FLS flow sensor
E9005 Inflow temperature sensor
t
V, BH
E9006 Inflow temperature sensor
t
V, BH
E9007 Circuit board A1P
E9008 Temperature sensor (refri-
gerant fluid side) t
L2
E9009 Optional: STB backup
heater (EKBUxx)
E9010 Jumper on A1P circuit
board
E9011 FLS flow sensor
E9012 Inflow temperature sensor
t or t ,
V1 V BH
E9013 Heat pump outdoor unit
main circuit board
Daikin Altherma EHS(X/H)
Daikin Altherma integrated solar unit
008.1444099_00 – 07/2018 – EN
Error
Flow fault
Inflow temperature t > 75 °C
V, BH
Inflow temperature t , > 65 °C
V BH
IG circuit board defective
Refrigerant temperature outside the valid range
STB fault
Flow sensor fault
Inflow temperature sensor fault
AG circuit board defective
8 Faults and malfunctions
Possible fault rectification
Water flow is too low or non-existent.
Required minimum flow rate: see
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 →
Info → Overview → Psyst]
▪ Check function of 3UVB1 3-way changeover
valve: Actual position of 3UVB1 with displayed
position [→ Main menu → Info → Overview
→ BPV].
▪ Does this fault occur during defrosting in room
heating or hot water preparation operating mode?
With optional backup heater: check its power sup-
ply 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)
Inflow temperature of backup heater (t
high.
▪ Inflow temperature sensor delivers incorrect val-
ues. Temperature sensor or connecting cable de-
fective.
▪ Check, replace.
▪ Contact problem, A1P jumper on X3A.
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.
No heat consumption at the plate heat exchanger.
▪ Check the flow rate.
▪ If the flow rate is OK, replace the refrigerant tem-
perature sensor.
Thermal contactor (STB) in the backup heater (EK-
BUxx) has triggered.
▪ Check and unlock the position of the STB.
Jumper missing on the "X21A" connection socket of
the A1P circuit board.
▪ Install the jumper.
FLS flow sensor defective.
▪ Replace the FLS flow sensor.
Measured value outside the permissible value
range. Sensor or connecting cable defective.
▪ Check, replace.
▪ Main circuit board in the heat pump outdoor unit
defective.
▪ Fan motor defective.
▪ Check, replace.
Installation and maintenance instructions
Chap. 5
, ) is too
V BH
45