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Check to see that it is not depressed. Check the wiring to the E-stop button for damage or
E-stop button -
disconnection. Replace the entire switch or both contact blocks on the switch if no wiring problem is
found.
First verify that both the Receiver and the Emitter have green LED lights lit. Check the wiring
Light Curtain -
for damage if one of the lights is not lit. Output 202 is feeding power to the receiver so it should be
checked to see that the 202 LED is lit in the Operators Console. If the red LED on the Receiver (unit closest
to operator's console) is lit the Light Curtain is not aligned properly. An amber LED indicates that the Light
Curtain alignment is poor or the lens is dirty. Re-align both the Emitter and Receiver as covered in the
Maintenance section under Adjustments. Replace the Light Curtain if the problem cannot be solved with
alignment or wiring repair.
Verify that the green power LED is lit on both the Receiver and Emitter of the
Either Brake Beam -
Obstruction sensor. The Emitters are located on the end of the Gantry and each will have two green LEDs
lit when power is present. The Receivers are located closest to the Runway and each will have one green
LED lit when power is present. The amber LED on the receiver should be lit if the beam is not broken. Re-
align the sensors as shown in the Maintenance section under adjustments if the amber LED is not lit. Check
the green LED on the corresponding input in the Gantry Electrical Enclosure. The input LED should always
be lit when the amber LED is lit on the receiver. A damaged or broken wire is the most likely cause if it is
not lit.
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Table of Contents
Troubleshooting
