Meaning of LED of Fibaro Roller Shutter FGR-222


since my roller shutter isn’t working correctly, I’m trying to find out if I have a basic misunderstanding.

Since I can’t calibrate my roller shutter (I guess due to missing feedback from the motor), I was trying to operate it (only open and close) by setting all parameters to 0 except #22 (motor operation time) to 25 (for 25 sec. that the rollers need to open/close). But after 25 sec. the LED of the shutter ist still red respetively green and when green it is kind of humming silently. Shouldn’t the LED turn off? Did I understand something wrong with the parameters?