The Warning LED lights when measured value drops below the set warningvalue for oil pressure and fuel pressure.
发光二极管灯的警告时，燃油压力测量值降至低于设定压力警告值的石油。
2
If the value is not within warning limits, it is assumed to be OK.
如果该值不属于警告的范围，那么它将被认为是OK。
3
It works correctly with undefined values as well, whereas with warnings turned on, a regular expression match on an undefined value will print a warning.