Compressor Not Activating

[DjScribbles]

This season, I added some logic to our code to help debug compressor issues; basically, whenever I call Compressor.Start/Stop (relay channel 1) I also activate relay channel 8 (which isn't connected to anything), with this, you can get a lot of info quickly about compressor issues from the LEDs on the DSC and Spike (we lost Galileo semi-finals due to a sudden compressor failure, which turned out to be the Digital Side Car relay section failing)

If neither relay 1 or 8 LEDs lights up, you have a software issue or the relay section of the DSC has failed.
If only relay 8 lights up, you have a problem with the pressure switch (or you are at full pressure)
If both 1 and 8 light up, then your problem is in the connection to the spike, the spike itself, or the compressor. You can check the LED on the spike (should be green when DSC led is lit) to confirm the connection is good.

[Mulcahy]

We had the same issue on our practice robot last Sunday. After wasting an hour checking everything, the problem was solved by placing the DSC in an Arbor press. Once the DSC was replaced with a new unit, everything worked properly. We have slow motion video of the process.

[Anthony Galea]

We had this exact problem at Centerline. We ended up having to switch the cRIO, but it could be the spike, spike fuse, the DSC, the cRIO, or possibly the PWMs. We tried all of those, with the cRIO last, and it finally worked.