Troubleshooting Carlo Gavazzi Photo Eyes

[APW]

Noticed my under carriage wash stayed on last night as a car cleared the eyes, it timed out and cut off. Now the under carriage won't come on at all. Im heading up there after while to check it out, (been watching this on my cameras.) I issued a manual command for my under carriage and it came on fine. Can someone give me some troubleshooting tips so I know what I am looking at when I get up there. The photo eye setup is only a few months old.

 

[BBE]

Find the amplifier that the eyes are hooked up to. Pay attention to the gain, should be set at around 3 o clock. Wave your hand in front of the eyes and see if the amplifier clicks on/off indicating the eyes are seeing eachother, and then not. I'm sure someone else can step in and take it from here.