Vaillant ecoTEC plus VU GB 5-5 Series Installation And Maintenance Instructions Manual

Also see for ecoTEC plus 1006 VU GB 1006/5-5: Installation and maintenance instructions

Contents

Vaillant ecoTEC plus VU GB 5-5 Series Installation And Maintenance Instructions Manual Manual pdf 43 page image

Appendix0020134823_07 ecoTEC plus Installation and maintenance instructions 43Status code MeaningSpecial casesS.30 Room thermostat (RT) is blocking heating modeS.31 Summer mode active or no heat requirement from eBUS controlS.32 Waiting period because of fan speed deviationS.34 Frost protection mode activeS.36 Target value of the eBUS control is < 20 °C and is blocking heating modeS.37 Fan waiting period: Fan failure in operationS.39 "Burner off contact" has triggered (e.g. surface-mounted thermostat or condensate pump)S.40 Comfort protection mode is active: Product running with limited heating comfortS.41 Water pressure > 0.6 MPa (6 bar)S.42 Flue non-return flap response blocks burner operation (only in conjunction with accessory VR40) or condensate pumpdefective; heat requirement is blockedS.44 "Return temperature sensor" comfort protection mode is active; product running with limited heating comfortS.46 "Flame lost at min. output" comfort protection mode is active; product running with limited heating comfortS.47 "Flame lost at max. output" comfort protection mode is active; product running with limited heating comfortS.48 "Deviating fan speed" comfort protection mode is active; product running with limited heating comfortS.53 Product is within the waiting period of the modulation block/operating block function as a result of water deficiency(flow/return spread too large)S.54 Product is within the waiting period of the operating blocking function as a result of water deficiency (temperature gradi-ent)S.96 Return sensor test running, heating demands are blocked.S.97 Water pressure sensor test running, heating demands are blocked.S.98 Flow/return sensor test running, heating demands are blocked.E Overview of fault codesCode Meaning CauseF.00 Flow temperature sensor interruption NTC plug not plugged in or has come loose, multiple plug on the PCBnot plugged in correctly, interruption in cable harness, NTC defectiveF.01 Return temperature sensor interruption NTC plug not plugged in or has come loose, multiple plug on the PCBnot plugged in correctly, interruption in cable harness, NTC defectiveF.10 Flow temperature sensor short circuit NTC defective, short circuit in cable harness, cable/housingF.11 Return temperature sensor short circuit NTC defective, short circuit in cable harness, cable/housingF.20 Safety shutdown: Temperature cut-out Incorrect earth connection between cable harness and product, flow orreturn NTC defective (loose connection), stray spark via ignition cable,ignition plug or ignition electrode, flue gas temperature too highF.22 Safety shutdown: Water deficiency No or insufficient water in the product, water pressure sensor defective,cable to pump or water pressure sensor loose/not connected/defectiveF.23 Safety shutdown: Temperature spread too great Pump blocked, insufficient pump output, air in product, flow and returnNTC connected the wrong way roundF.24 Safety shutdown: Temperature rise too fast Pump blocked, insufficient pump output, air in product, system pressuretoo low, non-return valve blocked/incorrectly installedF.25 Safety shutdown: Flue gas temperature too high Break in plug connection for optional flue gas safety cut-out (SCO),break in cable harnessF.27 Safety shutdown: Flame simulation Moisture on the electronics, electronics (flame monitor) defective, gassolenoid valve leakingF.28 Failure during start-up: Ignition unsuccessful Gas meter defective or gas pressure switch has triggered, air in gas, gasflow pressure too low, thermal cut-out has triggered, condensate routeblocked, incorrect gas injector, incorrect spare gas valve assembly, faulton the gas valve assembly, multiple plug on PCB incorrectly pluggedin, break in cable harness, ignition system (ignition transformer, ignitioncable, ignition plug, ignition electrode) defective, ionisation flow interrup-ted (cable, electrode), incorrect earthing of product, electronics defectiveF.29 Failure during operation: Re-ignition unsuccess-fulGas supply temporarily stopped, flue gas recirculation, condensate routeblocked, defective earthing of product, ignition transformer has sparkfailure