key signature meaning problem in heindelberg sm72

hello everyone, can someone please explain what the markings on the sm 74 engine pictures mean
what is the inverter main motor headle sm 74 there is a sign of the key what causes it. is the motor broken or the inverter
Thank you.

 

hello what is the problem with your machine?

 

hello, thank you for the response,
When tried to run heindelberg SM 74 engine only runs one round and then stops.and an error sign appears picture below.why?
what's the problem with the motor or the inverter?
when I checked the motor it looked okay
but the KVT on the screen shows the key sign, as drawn.
Thank you

 

hi do you hear the engine brake release.

 

Yeap
The engine break/brake is released, the engine rotates only one round. if it is run again, just let go of the brakes. The machine doesn't want to run.

 

without a engine break, it is executed once a round immediately stops itself. there is a key sign.