The status LED is located to the top right of the display, above the navigation keys. The LED can be illuminated in either green or red, this is used by the system to indicate certain system actions or errors. 

The green LED is used for the Passing Indicator. 

A flashing red LED is used to alert that an error has occurred, this can be viewed in the Error Log, opening the error log will clear this warning. 

A solid red LED is shown when a timing error occurs such as a Loop Error, and is accompanied by a beep as an audible warning. The LED will be solid red for 5 seconds after the error occurs, and will then revert to the flashing state. 

The brightness of the LED can be set in the General Settings menu and at full brightness can be seen even in bright daylight.