51Installation and maintenance instructions ecoTEC 0020029172_0310.5 Replacing PCB and displayd Danger!Before replacing the component, observe thesafety information in Chapter 10.1.e Danger!Risk of fatal electric shock through contactwith live connections!Disconnect the boiler from the power mains bypulling out the mains plug or deenergising theboiler using an isolating device with a contactopening of at least 3 mm (e.g. fuses or powerswitches). Only after this you may carry outthe installation.• Comply with the assembly and installation manualsprovided with the spare parts.Replacing the display or PCBIf you are replacing only one of the two components,the parameter matching functions automatically. Byswitching on the boiler, the new component takes overthe previously set parameters from the unreplacedcomponent.Simultaneously replacing display and PCBIf both components are replaced at the same time (inevent of spare part installation) the boiler enters failuremode when it is started up and displays the faultmessage "F.70".a Caution!Risk of damage!If you replace both components at the sametime, it is essential to check whether the cor-rect spare part display for this boiler variant isavailable. You must not use any other sparepart displays!• Enter the number of the boiler variant under diagnosispoint "d.93" at the second diagnosis level inaccordance with Table 10.1 (see Chapter 9.1.2).The PCB is now set to the boiler type and theparameters of all adjustable diagnosis pointscorrespond to the factory settings. You can now makethe specific settings for the system.Boiler Number of boiler variant (DSN)ecoTEC VU GB 466/4-5 H 46Table 10.1 Boiler variant numbers11 Vaillant ServiceTo ensure efficient and reliable operation of your boilerit is recommended that regular servicing is carried outby your service provider.Vaillant Applied System SalesVaillant Ltd., Unit D1 Lowfields Business Park, Elland.West Yorkshire. HX5 9DGTrainingTelephone 01634 292370Fax 01634 292354email training@vaillant.co.ukCommercial ServiceTelephone 0870 850 3072Mon - Fri 8.30 - 17.30Fax 01773 525 946email aftersales@vaillant.co.uk12 Recycling and disposalBoth the gas fired boiler and its transport packagingconsist mainly of recyclable raw materials.12.1 BoilerThe boiler and the accessories do not belong todomestic waste. Make sure the old boiler and anyexisting accessories are disposed of properly.12.2 PackagingThe transport packaging is disposed by the recognisedskilled trade company that installed the boiler.h Note!Please observe the applicable national legalregulations.Replacing components 10Vaillant Service 11Recycling and disposal 12