Vaillant ECOTEC EXCLUSIVE 627 VU 256/5-7 Installation And Maintenance Instructions Manual

Vaillant ECOTEC EXCLUSIVE 627 VU 256/5-7 Installation And Maintenance Instructions Manual Manual pdf 30 page image

10 Inspection and maintenance30 Installation and maintenance instructions ecoTEC exclusive 0020193966_019.7.6 Replacing the PCB or the displayNoteIf you only replace one component, when theproduct is switched on, the new component ad-opts the parameters that were previously set fromthe component that was not replaced.1. Open the electronics box. (→ Page 15)2. Replace the PCB or display according to the assemblyand installation instructions supplied.X31X1213. If you are replacing the PCB, remove the coding resist-ance (1) (plug X24) from the old PCB and plug the plugonto the new PCB.4. Close the electronics box.9.7.7 Replacing the PCB and the display1. Open the electronics box. (→ Page 15)2. Replace the PCB and display according to theassembly and installation instructions supplied.X31X1213. Remove the coding resistance (1) (plug X24) from theold PCB and plug the plug into the new PCB.4. Close the electronics box.5. Press the on/off button on the product. (→ Page 17)◁ After switching on, the product switches directly tothe menu to select the language. The default lan-guage setting is English.6. Select the required language and confirm by pressing.◁ You are automatically taken to D.093 to set thedevice specific number.7. Remove the correct value for the relevant product typefrom the technical data in the appendix, and press toconfirm.◁ The electronics are now set to the product type andthe parameters of all diagnostics codes are set todefault settings.◁ The installation assistant starts. (→ Page 17)8. Make the system-specific settings.9.7.8 Replacing the all-gas sensor3211. Remove the air intake pipe; see Removing the compactthermal module (→ Page 31).2. Undo the screws (3) just enough so that you can pullout the all-gas sensor (1) by the cable.3. Remove the plug (2) by pushing in the latching lug.4. Reinstall the new all-gas sensor in the reverse order.9.8 Completing repair work1. Establish the power supply.2. Switch the product back on if this has not yet beendone. (→ Page 17)3. Install the front casing.4. Open all service valves and the gas isolator cock.10 Inspection and maintenance▶ Adhere to the minimum inspection and maintenance in-tervals. The inspection may require maintenance to becarried out earlier, depending on the results.Inspection and maintenance work – Overview(→ Page 48)10.1 Function menuMenu → Installer level → Test programs → Function menuThe function menu allows you to actuate and test individualcomponents in the heating installation.Display Testprogramme ActionT.01 Check internalpumpSwitch the internal pump onand off.T.02 Check 3-wayvalveMove the diverter valve tothe heating position or to thehot water position.T.03 Check fan Switch the fan on and off.The fan runs at maximumrotational speed.T.04 Check cylindercharge pumpSwitch the cylinder chargingpump on and off.T.05 Check circula-tion pumpSwitch the circulation pumpon and off.