Name and Function of Each Part Tower Lamps and Rotary Beacon Tower lamps Rotary beacon 25 No. Name Description 1 Red On: Fault status (Emergency stop or device error) 2 White Flashing: Machine currently operating 3 Green On: Printing standby status Flashing: Printing paused status No. Name Description 1 Rotary beacon Lights up and the buzzer sounds if the rear protection covers are opened while the machine is printing.