Vaillant aroSTOR VWL B 200/5 UK Installation And Maintenance Instructions Manual

Also see for aroSTOR VWL B 200/5 UK: Operating instructions Installation and maintenance instructions

9 Troubleshooting20 Installation and maintenance instructions aroSTOR 0020285063_002. Use the supplied plug (1) to seal the condensate over-flow.Caution.Risk of material damage when closing thecondensate overflowThe condensate cannot flow out via the over-flow if the waste-water pipework is blocked.▶ After the blower-door test and beforestarting up the product, ensure that theplug for sealing the overflow has been re-moved.3. You will need to remove the plug from the condensateoverflow before starting up the product again.8.11 Checking the immersion heater1234561. Press the on/off button.2. Disconnect the product from the power grid.3. Drain the product. (→ Page 21)4. Remove the black decorative panel by pulling it force-fully to the side.5. Undo the screws (2) on the lower covering hood (3).6. Remove the lower covering hood (3).7. Undo the screws (4) and pull the cables out of the im-mersion heater.8. Remove the limit thermostat (5) from the immersionheater (6).9. Unscrew the set-up unit along with the immersionheater (6) and its seal.10. Check the scale deposition on the immersion heater.11. Replace the seal.9 Troubleshooting9.1 Eliminating faults▶ Before eliminating the fault, check that the product issupplied with power.▶ Check whether the stopcocks are open.▶ If fault messages appear, eliminate the fault after check-ing the table in the appendix.Fault messages – Overview▶ After eliminating the fault, start up the product onceagain.▶ If you are unable to eliminate the fault, contact CustomerService.9.2 Resetting parameters to factory settings1. Turn the rotary knob until the RESE T PAR. menu isdisplayed. – INST.MENU RESE T PAR..2. Press the rotary knob.3. Turn the rotary knob to select YES.4. Press the rotary knob to confirm the selection.5. Press the menu button to return to the original display.9.3 Resetting the safety cut-out121. Before resetting the safety cut-out (1), check whetheroperation has been switched off by a low-tariff contactor time programming.2. Check whether the safety cut-out for the auxiliary elec-tric heating has been tripped as a result of overheating(> 87 °C), or as a result of a defect.3. Remove the covering hood. (→ Page 11)4. Ensure that the immersion heater is not calcified.5. Press the button (2) to reset the safety cut-out.NoteThe safety cut-out settings must not bechanged.