Vaillant ecoTEC plus 612 Instructions For Installation And Servicing

Also see for ecoTEC plus 612: Instructions for use Instructions for installation and servicing Installation and maintenance instructions Instructions for use Installation and maintenance manual

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Vaillant ecoTEC plus 612 Instructions For Installation And Servicing Manual pdf 47 page image

47Instructions for installation and servicing ecoTEC / 839592_098.4 Test programsSpecial functions can be triggered on the appliances byactivating various test programs.These programs are given in detail in the Table 8.5.• The test programs P.0 to P.6 will be started when“Power ON” is turned on and the “+” key is pressedfor 5 s. The display shows “P.0”.• Press the “+” key to start counting the test numberupwards.• Press the “i” to operate the appliance now and tostart the test program.• Press “i” and “+” simultaneously to exit the test pro-grams. You can also exit the test programs by notpressing any key for 15 minutes.Display MeaningP.0 Bleeding test program. The heating circuit and hotwater circuit (combination boiler only) is bled via theautomatic air vent (the cap on the automatic air ventmust be loosened).P.1 Test program where the appliance is operated in fullload after successful ignitionP.2 Test program where the appliance is operated withminimum gas volume (ignition gas volume) after suc-cessful ignitionP.3 not availableP.4 not availableP.5 Test program for the safety temperature limit check;appliance heats up by by-passing a regulating shut-down through the flow regulator until the shutoff tem-perature of 97 °C is achieved.P.6 Filling test program. The diverter valve moves to thecentre positionTable 8.5 Test programs8.5 Resetting parameter to factory settingsBesides the option to reset individual parameters manu-ally to the factory settings specified in tables 8.2 and8.3, you can also reset all parameters simultaneously.• In the second diagnostic level, under the diagnosticnumber “d.96” change the value to 1 (see section 8.1.2).The parameters of all adjustable diagnostic numbersnow correspond to the factory settings.9 Parts replacementThe tasks listed below in this section may be carried outonly by a qualified engineer.• Only use genuine spare parts for repairs.• Make sure the parts are correctly fitted and that theiroriginal position and alignment are retained.9.1 Safety instructionsDanger!Each time the components are replaced, complywith the safety instructions below for your ownsafety and to avoid damage to the appliance!• Put the appliance out of operation.Caution!Before starting any maintenance work:Isolate the mains electricity supply by discon-necting the plug at the socket outlet (if there isonly an isolating switch remove the fuse fromthe switch).• Close the service valve in the gas supply as well as theservice valves in the heating flow and return pipe.• Close the service valve in the cold water supply line(combination boilers only)!• Empty the appliance if you want to replace water-bearing components of the appliance!• Make sure that no water drops on live components(e.g. switch box etc.)!• Use only new seals and O-rings!• After completing the work, check for gas leaks andperform a function check (see section 7.6)!• Always check earth continuity, polarity and resistanceto earth with a multimeter after any service work andafter exchanging any electrical component.9.2 Replacing burnerDanger!Before replacing the component, comply withthe safety instructions in Section 9.1.• Dismantle the burner module as described in Section 7.2.1.1Fig. 9.1 Replacing burner• Loosen the 4 screws (1) on burner, and remove the burner.• Mount the new burner with a new seal. Ensuring that thenotch in the burner aligns with the burner viewing window.• Install the burner module as described in Section 7.2.4.• After completing the work, check for gas leaks andperform a function check (see section 7.6)!9.3 Replacing fan or gas valveDanger!Before replacing the component, comply withthe safety instructions in section 9.1.• Turn off the boiler.• Isolate the electrical supply to the boilerTroubleshooting 8Parts replacement 9