Appendix0020221298_02 auroSTOR Installation and maintenance instructions 17AppendixA Detecting and rectifying faultsFault Possible cause RemedyNo throughput at thevalve1. Water supply valve closed2. Main filter blocked3. Pressure reducer not installed correctly1. Check and open the valve.2. Close the water supply valve, clean the filterand the water pressure reducer.3. Check whether the pressure reducer has beeninstalled correctly.Low throughput andpressure at a valve1. Filter in cold water supply clogged 1. Close the cold water supply, clean the filter forthe water pressure reducer.Water from the valve iscold1. The cylinder was not set or is not operating.2. The heat generator does not work.3. The thermal cut-out was triggered.4. The 2-way motorised valve is not working5. The immersion heater does not work.1. Check the thermostat or the room thermostatand, if required, set this.2. Check the heat generator; a fault code ispresent.3. Check and initialise the cylinder.4. Check the valve's connections.5. Set the thermostat or the room thermostat.Hot water temperaturetoo high1. Use a thermometer to check the temperature; itmust be between 60 and 65 °C.2. Check the cabling.3. Thermostat set too high4. Defective thermostat1. Install a mixer valve.2. Repair the cable.3. Reduce the temperature of the thermostat to55 °C.4. Replace the thermostat.Irregular hot water outputat the valve1. Defective expansion vessel2. Thermal control1. Set the expansion vessel.2. Interrupt the power supply of the product andheat generator, check the thermal cut-outs andreplace these if you find any defects.B Inspection and maintenance work – OverviewN° Work Maintenance-re-lated interval1 Check the connections for tightness. Annually2 Check the temperature and pressure expansion relief valve. Annually3 Check the expansion relief valve. Annually4 Check the pressure in the expansion vessel. Annually5 Check the hot water output at the valve (if required, clean the filters). Annually6 Check the target hot water temperature. Annually7 Check whether the thermostatic mixer is working. Annually8 Fill out the cylinder's benchmark checklist. AnnuallyC Technical dataTechnical data – GeneralVIH S GB 200/3BESVIH S GB 250/3BESVIH S GB 300/3BESActual volumetric capacity 191.0 l 241.8 l 281.3 lHeating circuit hot water volumetric capacity inaccordance with EN 12897127.0 l 148.0 l 159.0 lHot water volumetric capacity of the solar circuit 187.0 l 231.0 l 249.7 lMaximum pressure of the heating tube coil dur-ing operation0.35 MPa(3.50 bar)0.35 MPa(3.50 bar)0.35 MPa(3.50 bar)Operating pressure 0.35 MPa(3.50 bar)0.35 MPa(3.50 bar)0.35 MPa(3.50 bar)Maximum operating pressure 0.7 MPa(7.0 bar)0.7 MPa(7.0 bar)0.7 MPa(7.0 bar)