Blocking Error - Vaillant geoTHERM VWS Installation Instructions Manual

10 Troubleshooting and diagnosis
10.5

Blocking error

The heat pump is shut down. It can only be restarted by
resetting the error after removing the cause of the fault
(see Menu I 1).
With the exception of Errors 90 and 91, these do not
need to be reset. The heat pump starts again when the
cause of the error has been removed.
Emergency mode
Depending on the nature of the malfunction, there are
settings that can be made to allow the heat pump to
continue operating in an emergency mode (by means of
the integrated electrical heating) until the fault is
cleared, either in heating operation (display: "CH priori-
ty"), hot water operation (display: "DHW priority") or
both (display: "CH priority/DHW priority"), see the fol-
lowing tables, "Emergency operation" column.
Fault code Error text/description
32 Error heat source sensor T8
Short-circuit in the sensor
33 Error heat circuit pressure
sensor
short-circuit in the pressure
sensor
34 Error brine pressure sensor
short-circuit in the pressure
sensor
40 Error comp outlet sensorT1
Short-circuit in the sensor
41 Error heat source sensor T3
Short-circuit in the sensor
42 Error HP return sensor T5
Short-circuit in the sensor
43 Error HP flow sensor T6
Short-circuit in the sensor
44 Error external sensor AF
Short-circuit in the sensor
45 Error DHW tank sensor SP
Short-circuit in the sensor
46 Error HB flow sensor VF1
Short-circuit in the sensor
47 Error HB return sensor RF1
Short-circuit in the sensor
48 Error flow sensor VF2
Short-circuit in the sensor
Table 10.5 Fault-induced shutdown
74
Emergency
Possible cause
mode
possible The internal sensor for the source
outlet temperature is defective or
not properly plugged into the PCB.
The pressure sensor in the heating
circuit is defective or not properly
plugged in.
possible The pressure sensor in the heat
source circuit is defective or not
properly plugged in.
possible The internal temperature sensor on
the high pressure side of the
compressor is defective or not
properly plugged into the PCB.
possible The internal sensor for the source
inlet temperature is defective or not
properly plugged into the PCB.
possible The internal temperature sensor on
the heating return line is defective
or not properly plugged into the
PCB.
possible The internal temperature sensor on
the heating flow line is defective or
not properly plugged into the PCB.
possible The outside temperature sensor or
its connecting cable is defective or
it is not connected correctly.
possible The cylinder temperature sensor is
defective or it is not connected
correctly.
possible The upper sensor in the buffer
cylinder is defective or it is not
connected correctly.
possible The lower sensor in the buffer
cylinder is defective or it is not
connected correctly.
WW The contact temperature sensor
operation VF2 in the heating circuit is
possible defective or it is not connected
correctly.
Remedy
Check the plug contact on the PCB and
the cable harness, check the sensor for
correct position and function (resistance
measurement using VR 11 characteristics,
see Appendix), replace sensor.
Check the plug contact on the PCB and
the cable harness, check pressure sensor
for correct functioning, replace pressure
sensor.
Check the plug contact on the PCB and
the cable harness, check the sensor for
correct position and function (resistance
measurement using VR 11 characteristics,
see Appendix), replace sensor.
Check the ProE plug on the PCB, check
the connecting cable, replace the sensor.
Check the ProE plug on the PCB, check
the sensor for correct function
(resistance measurement using VR 10
characteristics, see Appendix), replace
sensor.
Installation instructions geoTHERM VWS 0020046310_01