Vaillant geoTHERM VWS Installation Instructions Manual

Also see for geoTHERM VWS: Installation instructions Operating manual Operating manual

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Vaillant geoTHERM VWS Installation Instructions Manual Manual pdf 72 page image

Installation instructions geoTHERM VWS 0020046310_017210.4 Temporary shut-downThe compressor shuts down, the heat pump remains inoperation. The compressor can start again after 5 minu-tes at the soonest. (see below for exceptions).Fault code Error text/description Possible cause Remedy20 Frost protection heat sourcemonitoring source outletTemperature difference at theheat source (T3 - T8) > presetvalue "Delta T. T3-T7"This error message isdeactivated as standard and canonly be activated via vrDIALOGparameter "permitted temp.difference" (20 K differencemeans deactivated).Heat source pump defective,temperature sensor T8 or T3defective.Too low a volume flow in the heatsource circuit.No/full dirt filter in source return line.Air in brine circuit.Check heat source flow rate.Check the plug contact on the PCB and the cableharness, check the sensor for correct positionand function (resistance measurement usingVR 11 characteristics, see Appendix), replacesensor.Check the volume flow of the well pump/brinepump (optimum temp. difference approx. 3-5 K).Fit/clean dirt filter.Bleed the brine circuit.22 Frost protection heat sourceover. source outletSource outlet temperature T8too low (< Freeze protect temp.parameter in Menu A4)Heat source pump defective,temperature sensor T8 defective.Too low a volume flow in the heatsource circuit.No/full dirt filter in source return line.Air in brine circuit.Check heat source flow rate.Check the plug contact on the PCB and the cableharness, check the sensor for correct positionand function (resistance measurement usingVR 11 characteristics, see Appendix), replacesensor.Check the volume flow of the well pump/brinepump (optimum temp. difference approx. 3-5 K).Clean the filterBleed the brine circuit.Table 10.3 Temporary malfunctions10 Troubleshooting and diagnosis