Rotex HPSU compact 304 Installation And Maintenance Manual page 50

8 x Errors, malfunctions and messages
Code Malfunction /
Error messageg
Display Internal
E9004 7H Fehler Durchfluss Flow sensor FLS
Flow temperature
E9005 8F
t >75 °C
V, BH
Flow temperature
E9006 8H
t >65 °C
V, BH
E9007 A1 Platine IG defekt
Coolant tempera-
E9008 A5 ture outside of the
valid range
E9009 AA
STB-Fehler
E9010 AC
E9011 C0 Fehler Flowsensor Flow sensor FLS
Fehler Vorlauffüh-
E9012 C4
ler
E9013 E1 Platine AG defekt
50
Component/Designation
Flow temperature sensor
t
V, BH
Flow temperature sensor
t
V, BH
Circuit board A1P
Temperature sensor (liq-
uid-side coolant) t
L2
Optional: STL Backup
Heater (BUxx)
Bridge on board A1P
Flow temperature sensor
t or t
V2 V, BH
Main board of the heat
pump exterior unit
Causes and possible error correction
Water flow is too low or there is none at all. Minimum water flow
required:
– operating mode "Heizen": 600 l/h
– operating mode "Kühlen": 840 l/h
– Automatic defrosting function (
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 device-internal circulation pump must be
completely bled.
On the controller (rotary switch setting "Info"
whether there is adequate water pressure (>0.5 bar).
Check the function of the 3-way switching valve 3UVB1
(compare actual setting of 3UVB1 with BPV position
[Übersicht] displayed in the parameter).
If this fault occurs during defrost operation in the operating
mode room heating or water heating? With optional backup
heater: check its power supply and fuses.
Check the fuses in the control housing of the ROTEX HPSU
compact (pump fuse (FU1) on circuit board A1P and printed
circuit board fuse (F1) on the RoCon BM1 circuit board).
Check flow sensor FLS for contamination and function, if
necessary clean, replace.
Flow temperature of the backup heater (t
– Flow temperature sensor sending incorrect values. Tempera-
ture sensor or connecting cable defective.
Check, replace.
– Contact problem A1P-bridge on X3A.
Communication between the heat pump exterior equipment and
heat pump interior equipment malfunctioning.
– Electromagnetic influences.
Perform reset.
– Circuit board A1P defective.
Replace circuit board A1P.
No heat absorption at the plate heat exchanger.
Check flow.
If the flow is OK, then replace the coolant temperature sensor.
Thermal protection switch (STB) on Backup Heater (BUxx) was
triggered.
Check and unlock position of STL.
Bridge of connection socket "X21A" missing on board A1P.
Plug in strapping plug.
Flow sensor FLS defective.
Replace flow sensor FLS.
Measurement outside the permitted value range. Sensor or con-
nection cable defective.
Check, replace.
– Main board in the heat pump exterior unit defective.
– Ventilator motor defective.
Check, replace.
FA ROTEX HPSU compact 4 - 06/2015
) active: 1020 l/h
) check
) is too high.
V, BH