Vaillant flexoTHERM exclusive VWF 57/4 Installation And Maintenance Instructions Manual
Also see for flexoTHERM exclusive VWF 117/4: Operating instructionsNstallation and Maintenance InstructionsInstallation and maintenance instructionsOperating instructions
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Appendix0020213395_00 flexoTHERM exclusive Installation and maintenance instructions 43Status code MeaningS.350 Heating rod: Safety cut-out openS.351 Heating rod: Flow temp. too highS.352 Heating rod: Pressure too lowS.353 Heating rod: Flow rate too lowS.354 Heating rod: Phase failureE Fault codesNoteIn the event of rare faults which are caused by components in the refrigeration circuit, inform Customer Service.Code Meaning Cause RemedyF.070 Invalid Device Specific Number – Replacing the control PCB anddisplay PCB– Setting the correct Device SpecificNumberF.086 Building circuit: Lockout contactS20 open– Contact S20 on heat pump mainsconnection PCB (HMU) open– Incorrect setting of the limit thermo-stat– Flow temperature sensor (heatpump, gas-fired boiler, systemsensor) measures values thatdeviate downwards– Adjust the maximum flow temperat-ure for the direct heating circuit viathe system controller (observe theupper switch-off threshold for theboilers)– Adjust the set value for the limit ther-mostat– Check the sensor valuesF.514 Temp. sensor fault: Compressorinlet – Sensor not connected or sensor in-put has short-circuited– Check the sensor, and replace ifnecessary– Replace the cable harnessF.517 Temp. sensor fault: Compressoroutlet– Sensor not connected or sensor in-put has short-circuited– Check the sensor, and replace ifnecessary– Replace the cable harnessF.519 Sensor fault: Building circuit re-turn temp.– Sensor not connected or sensor in-put has short-circuited– Check the sensor, and replace ifnecessary– Replace the cable harnessF.520 Temp. sensor fault: Building cir-cuit flow– Sensor not connected or sensor in-put has short-circuited– Check the sensor, and replace ifnecessary– Replace the cable harnessF.532 Building circuit: Flow rate too low – Stop cock was not opened– Building circuit pump defective– All consumers in the heating systemare closed– Flow rate is too low for recordingwith the volume flow sensor(< 120 l/h)– Check the stop cocks and thermo-static radiator valves– Ensure that the flow rate is at least35% of the nominal flow rate– Check that the building circuit pumpfunctions correctlyF.546 Sensor fault: High pressure – Sensor not connected or sensor in-put has short-circuited– Check the sensor (e.g. using an in-stallation aid), and replace if neces-sary– Replace the cable harnessF.583 Building circuit: Flow temp. toolow– Four-way valve is mechanicallyblocked– The temperature sensor in the flow isdefective– Air in the building circuit– Check the building circuit flow rate– Check the quality of the plug contacton the PCB and on the cable har-ness– Check that the sensor is workingcorrectly (measure resistance usingsensor characteristic values)– Replace the sensor– Purging the building circuitF.685 Connection error: Control not de-tected– System controller was previously de-tected but the connection is broken– Check the eBUS connection to thesystem controllerF.701 Temp. sensor fault: Environ. cir-cuit inlet– Sensor not connected or sensor in-put has short-circuited– Check the sensor, and replace ifnecessary– Replace the cable harness |
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