Daikin Altherma EHSX04P50D Installations- Und Wartungsanleitung Seite 46

8 Faults and malfunctions
Code Component/Designation
E198 FLS flow sensor,
3-way switch valve 3UVB1
E200 Electrical components
E8005 Pressure sensor DS
E8100 Electrical components
E9000
E9001 Return flow temperature
sensor t
R2
E9002 Inflow temperature sensor
t or t ,
V1 V BH
E9003 Frost protection function
fault
Installation and maintenance instructions
44
Error
Flow measurement not plausible
Communication fault
Water pressure in heating system too low
Communication
Temporary internal message
Return flow temperature sensor fault
Inflow temperature sensor fault
Plate heat exchanger (PWT)
Possible fault rectification
Error occurs when 3UVB1 3-way switch valve is in
the bypass position, the internal circulation pump is
running but too low a volumetric flow is measured.
Required minimum water flow rate:
▪ "Heating" operating mode: 600 l/h
▪ "Cooling" operating mode: 840 l/h
▪ Automatic thawing function () active: 1020 l/h
▪ Air in heating system.
▪ Vent.
▪ Internal circulation pump is not running.
▪ Check electrical connection and controller set-
tings. If the circulation pump is defective, re-
place it.
▪ FLS flow sensor dirty, clogged.
▪ Check, clean.
▪ FLS flow sensor defective.
▪ 3UVB1 3-way switch valve drive defective.
▪ Check, replace.
Communication between the RoCon BM2C and
A1P printed circuit board lost.
▪ Wiring or connections, poor contact.
▪ Check, replace
Water pressure has fallen below permissible min-
imum value.
▪ Insufficient water in the heating system.
▪ Check the heating system for leaks, top up wa-
ter.
▪ Pressure sensor DS defective.
▪ Check, replace.
Initialisation after heat pump start failed.
Printed circuit board A1P defective.
▪ Check, replace.
Not relevant for proper system operation.
Sensor or connecting cable defective.
▪ Check, replace.
Sensor or connecting cable defective.
▪ Check, replace.
Measured value t < 0 °C
V1
▪ Failure of the frost protection function for the plate
heat exchanger because the water flow is too low.
See fault code E9004 / 7H.
▪ Failure of the frost protection function for the plate
heat exchanger because there is a lack of refri-
gerant in the system. See fault code E9015 / E4.
Daikin Altherma EHS(X/H)
Daikin Altherma integrated solar unit
008.1444099_00 – 07/2018 – EN