Vaillant ecoTEC VU 466/4 Installation And Maintenance Instructions Manual

Also see for ecoTEC VU 466/4: Installation manual Operating manual

Contents

Vaillant ecoTEC VU 466/4 Installation And Maintenance Instructions Manual Manual pdf 42 page image

Installation and maintenance instructions ecoTEC 0020029172_0342• Fill the expansion vessel with air at a pressure of lessthan 0.75 bar according to the static head of theheating installation.• If water is discharged at the testing nozzle of theexpansion vessel the vessel must be replaced.8.8 Checking gas connection pressure(gas inlet working pressure)To check the connection pressure proceed as describedin Chapter 6.3.3.8.9 Checking the CO 2 concentrationTo check the CO2 concentration follow the proceduredescribed in Chapter 8.1.3.8.10 Test operationAlways perform the following checks after completingany maintenance task:• Start up the appliance in accordance with theinstructions in the relevant operating manual.Fig. 8.11 Tightness check• Check the appliance for gas and water leaks.• Check the flue system for leaks and for properfixation.• Check over-ignition and that the flame on the burneris burning evenly.• Check the function of the heating (see Chapter 6.4.1)and hot water generation (see Chapter 6.4.2).• Document the inspection/maintenance tasks carriedout in the form provided in the inspection ormaintenance contract.9 Troubleshootingh Note!Whenever possible, please quote the faultmessage displayed (F.xx) and the status of theboiler (S.xx) when contacting the Vaillantcustomer service or your Vaillant servicepartner.If the display flashes „SEr“ this means, thatyou should carry out a service in the nearfuture. The boiler is not in a failure mode butworks further on. Press the info-button „i“ foraddional information.9.1 Diagnostics9.1.1 Status codesThe status codes that you can see on the displayprovides information about the current operatingcondition of the boiler.The display of the status codes can be viewed asfollows:Fig. 9.1 Display of status codes• Push the "i" button.The status code appears in the display, e.g. S.4 for"Heating mode, burner on.".The display of the status codes can be ended as follows:• Push the "i" buttonor• Do not push any buttons for about 4 minutes.Depending on the settings, the current flowtemperature or current water pressure of the heatinginstallation reappears in the display.8 Inspection and maintenance9 Troubleshooting