OPERATION
3-10 EPT009665 Issue 2 May 2015
• Shutter State / Error Indicator
  
Note: The GREEN shutter preparation LED blinking is suppressed if  
one or both interlock is not closed.
Laser Indicator / Error Indicator
  
Lit YELLOW Shutter is open, caution laser 
radiation is possible!
Lit RED Shutter temperature display
(after power-up only).
Lit RED (permanent) shutter feedback cross-check 
failed.
Flashing RED while the GREEN 
Shutter preparation LED is lit or 
blinking
Shutter is close to over 
temperature.
Blinking RED while GREEN 
shutter preparation LED is 
blinking
A shutter over temperature, or 
sensor fail (<10°C) had 
occurred. Therefore the laser 
was switched off. Restart is 
possible.
Flashing RED while GREEN 
shutter preparation LED is off
A shutter temperature sensor 
fail (<10°C) is present. Therefore 
the laser is switched off.
Blinking RED while GREEN 
shutter preparation LED is off
 A shutter over temperature is 
present. Therefore the laser is 
switched off.
Lit YELLOW Laser source ready for 
emission.
Lit RED (error) Laser is not (correctly) started.
1x Flashing YELLOW Laser modulation (print activity) 
missed.
2x Flashing YELLOW Laser modulation (print activity) 
not permitted.
3x Flashing YELLOW Laser modulation (print activity) 
missed AND not permitted.