Vaillant ecoTEC plus VU Series Installation And Maintenance Instructions Manual

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Vaillant ecoTEC plus VU Series Installation And Maintenance Instructions Manual Manual pdf 28 page image

10 Decommissioning the product28 Installation and maintenance instructions ecoTEC plus 0020029173_049.4 Querying the fault memoryThe product has a fault memory. You can use this to querythe last ten faults that occurred in chronological order.▶ Press and at the same time to display the last tenfaults that occurred.Overview of fault codes (→ Page 34)▶ Use to scroll back in the fault memory.▶ To exit the fault memory display, press or do notpress any button for approximately four minutes.◁ Depending on the settings, the current flow temperat-ure or current water pressure of the heating installa-tion reappears in the display.9.5 Performing diagnostics▶ You can use the diagnostics codes (→ Page 22) duringfault diagnostics to change individual parameters or todisplay further information.9.6 Using check programmes▶ You can also use the check programmes (→ Page 16)fortroubleshooting.9.7 Resetting parameters to factory settings▶ To simultaneously reset all parameters to the defaultsettings, set D.96 to 1.9.8 Preparing the repair work1. Decommission the product.2. Disconnect the product from the power mains.3. Remove the front casing. (→ Page 11)4. Close the gas isolator cock.5. Close the service valves in the heating flow and in theheating return.6. Close the service valve in the cold water pipe.7. Drain the product if you want to replace water-bearingcomponents of the product.8. Make sure that water does not drip on live components(e.g. the electronics box).9. Use only new seals.9.9 Replacing defective components9.9.1 Replacing the burner1. Remove the compact thermal module. (→ Page 24)12. Remove the four screws (1) from the burner.3. Remove the burner.4. Fit the new burner with a new seal.5. Make sure that the cutouts in the seal and the burnerare situated above the burner flange sight glass.6. Install the compact thermal module. (→ Page 27)9.9.2 Replacing the PCB and/or the displayNoteIf you are replacing only one component, the setparameters are transferred automatically. Whenthe product is switched on, the new componentadopts the previously set parameters from theunreplaced component.1. Disconnect the product from the power mains and makesure that it cannot be switched back on again.Conditions: Replacing the display or PCB▶ Replace the PCB or display according to the assemblyand installation instructions supplied.Conditions: Replacing the PCB and display at the same time▶ Replace the PCB and display according to the assemblyand installation instructions supplied.◁ If you replace both components at the same time, theproduct switches to fault mode and displays the faultmessage F.70 after it is switched on.▶ In the second diagnostics level under the diagnosticscode d.93, enter the number of the product type.▶ Confirm your setting.◁ The electronics are now set to the product type andthe parameters of all diagnostics codes are set todefault settings.▶ Make the system-specific settings.9.10 Completing repair work▶ Check that the product works correctly and is leak-tight,see "Checking function and leak-tightness" (→ Page 21).10 Decommissioning the product▶ Switch off the product.▶ Disconnect the product from the power mains.▶ Close the gas isolator cock.▶ Drain the product. (→ Page 27)11 Recycling and disposalDisposing of the packaging▶ Dispose of the packaging correctly.▶ Observe all relevant regulations.