Quick Reference for End-Users Lambda Transmitter LT2 ... - lamtec

9 Faults / WarningsNOTICE!Testing is shut off on delivery.Activate testing in parameter group 1330 to 1334.The testing checks, if the measuring value changes more than the parameterised thresholdvalue during a specified time.Fault Analogue OutputCheck the parameters of the analogue outputs.• Parameter 530…539 analogue output 1• Parameter 540…549 analogue output 2• Parameter 550…559 analogue output 3• Parameter 560…569 analogue output 4Check the analogue outputs on the processor electronic and replace them if necessary. Ananalogue output might be activated, but is not assembled? Check assembly.see chapter 11.3.3 Fuses.O2 Value IncorrectIf a control measurement results in a different O 2 value than the one displayed:• Has the relationship between liquid/dry measurement been taken into account? (seechapter 11.4 Wet/Dry Measurement Deviations, Conversion Table).• Check LT2, see chapter 8.2 Checking the LT2• Replace LS2 Lambda probe. Replace O 2 –measuring cell.• Commission the new probe as described in chapter 6 Commissioning / Shutdown• Measuring value too high? Secondary air, check sealing and hose connections if they aretight.NOTICE!During counter-measurement, check whether the instrument being used measures wet or dry.Those with an advance gas cooler are always used for dry measurement. This also applies toinstruments that extract moisture via a chemical compound. The LS2 Lambda probe measureswet. The difference between wet and dry measurements can be obtained from the diagramin the Appendix (see chapter 11.4 Wet/Dry Measurement Deviations, Conversion Table).9.4 Warnings - Causes and SolutionsGenerally speaking, warnings do not affect the measurement functions.9.4.1 LS2 Internal Resistance too HighThis message is output if the AC internal resistance (R I ) of the ZrO 2 -cell exceeds the permissiblelimit of 200 during operation.Possible cause:Probe aged (worn out) Obtain a spare probe and replace.46