6.6.3 Error Handling
In the following tables the engine control system errors and their error handling are listed. Three
different types errors are known:
Errors which lead to a latched caution indication
Errors which lead to a non-latched caution indication
Not indicated errors
In case of a latched caution an unscheduled maintenance is necessary and Austro Engine
GmbH has to be informed.
6.6.3.1 Description of ECU Switch Over
In case of an ECU switch over, the other ECU channel takes over the control of the engine.
This control mode change can lead to slightly different power demand setting (up to 5 %), due to the
tolerances of the sensor mounting to the power lever.
This switch over can lead to a temporarily (less than 1 sec) and slight deviation in the desired speed till
the ECU internal control functions are aligned to the engine operation state.
If a failure occurs which results in reduced engine control capability (e.g. injector failure) the power
performance is also reduced with the now active ECU channel.
If a failure occurs and the now active ECU can rely on plausible values (e.g. Boost Pressure Sensor
defect) the performance of the engine will remain unchanged.
Because both ECU´s are similar, also two warnings are provided to display that one or both channels
detect a failure
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