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 27 page image

Troubleshooting 90020193966_01 ecoTEC exclusive Installation and maintenance instructions 279.3 Eliminating faults▶ If fault messages (F.XX) appear, eliminate the faultby referring to the table in the appendix or using theFunction menu (→ Page 30) and the Check programmes(→ Page 18).Overview of fault codes (→ Page 43)If several faults occur at the same time, the display showsthe corresponding fault messages for two seconds each inalternation.▶ Press (max. three times) to restart the product.▶ If you are unable to eliminate the fault and the fault re-curs despite reset attempts, contact customer service.9.4 Calling up/clearing the fault memoryIf faults have occurred, the last ten (max.) fault messagesare available in the fault memory.▶ Navigate to Menu → Installer level → Fault list and con-firm by pressing .◁ The display shows the number of faults that haveoccurred, the fault numbers and the correspondingplain text display.▶ Press or to call up individual fault messages.▶ Press twice to delete the fault list.9.5 Resetting parameters to factory settings1. Navigate to Menu → Installer level → Diagnosticsmenu → D.096 Reset to factory settings? and con-firm by pressing .2. Press to set the value to 1 and confirm by pressing.9.6 Preparing the repair work1. Temporarily decommission (→ Page 33) the product.2. Disconnect the product from the power mains.3. Remove the front casing. (→ Page 11)4. Close the service valves in the heating flow, in the heat-ing return and in the cold water pipe.5. Drain the product (→ Page 33) if you want to replaceany of the product's water-bearing components.6. Make sure that water does not drip on live components(e.g. the electronics box).7. Use only new seals.9.6.1 Procuring spare partsThe original components of the product were also certifiedby the manufacturer as part of the declaration of conformity.If you use other, non-certified or unauthorised parts duringmaintenance or repair work, this may void the conformity ofthe product and it will therefore no longer comply with theapplicable standards.We strongly recommend that you use original spare partsfrom the manufacturer as this guarantees fault-free and safeoperation of the product. To receive information about theavailable original spare parts, contact the contact addressprovided on the reverse of these instructions.▶ If you require spare parts for maintenance or repairwork, use only the spare parts that are permitted for theproduct.9.7 Replacing defective components9.7.1 Replacing the burner1. Remove the compact thermal module. (→ Page 31)212. Undo the four screws (1) on the burner.3. Remove the burner.4. Install a new seal (2) on the new burner.5. Install the compact thermal module. (→ Page 32)9.7.2 Replacing the gas valve assembly1. Switch off heating mode and hot water generation (→Operating instructions).BA2. Remove the air intake pipe.3. Remove the two plugs from the gas valve assembly.4. Unscrew the union nut from the gas valve assembly.