I have zero local knowledge but there is a human instinct when faced with a new situation to call a stop if unsure and seek help. It might be that a year down the line when orange light C turns on the driver simply logs it and carries on successfully until the end of the day having built experience up to have the confidence they aren't about to be stranded.But each unit has 4 Ford Duratorq engines, presumably new, or refurbished, but if one fails, the other 3 should provide service. Unless the monitoring software stops the train?