Vaillant geoTHERM VWS Operating Manual

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Vaillant geoTHERM VWS Operating Manual Manual pdf 25 page image

25Operating Manual geoTHERM VWS 0020045200_005.10.2 Activating emergency modeDepending on the type of malfunction the expert techni-cian can set the heat pump to continue operation inemergency mode (via an integrated electric auxiliaryheating) until the cause of the error is remedied, and ei-ther for heating operation (display "heating priority"),for hot water operation (display "hot water priority") orfor both (display "heating priority/hot water priority"),see the following tables, column "emergency operation".5.10.3 Errors/malfunctions that you can remedyMalfunction sign Possible cause RemedyNoise in the heatingcircuit.Dirt in the heatingcircuit.Bleeding heatingcircuit.Faulty pump.Air in the heatingcircuit.Table 5.4 Other malfunctions5.10.4 Warning messagesThe following warning messages do not cause a mal-function in the operation of the heat pump. The heatpump is not shut down.Take note of the error code and text and discuss thisduring the next inspection with the expert technician.Fault code Error text/description26 Overheating on compressor pressure side36 Low brine pressureTable 5.5 Warning messages, no shutdown5.10.5 Temporary malfunctionsThe heat pump is shut down temporarily and starts upagain independently when the cause of the fault is re-moved.Depending on the error the heat pump switches back onautomatically after 5 or 60 minutes.Take note of the error code and text and discuss thisduring the next inspection with the expert technician.Fault code Error text/description20 Frost protection heat source monitoring sourceoutletTemperature difference of the heat source > setvalue "permitted temp. difference"This error message is deactivated as standard andcan only be activated via vrDIALOG parameter"permitted temp. difference" (20 K differencemeans deactivated).22 Frost protection heat source over. source outletSource outlet temperature too low(27 Coolant pressure too highThe integrated high pressure switch tripped at30 bar (g).The heat pump cannot be restarted until after60 min. at the earliest.28 Coolant pressure too lowThe integrated low pressure switch tripped at1.25 bar (g).29 Coolant pressure outside the rangeIf the error occurs twice in a row the heat pumpcannot be started until after 60 min. at the earliest.Table 5.6 Temporary malfunctionsOperation 5