CD is obviously not pulling in, what I asked was---Does CD relay pulse or try to pull in and then drop out? I don't think it ever gets in because if it did, then the door would inch closed. If you see a pulse on a VMM, then you may need a 250mfd 50VDC polarized cap between 24D and PC. I have seen a lot of SSD (solid state dover) jobs that needed a little bit of filtering in this circuit to cure just such a problem. I know it sounds crazy, but every time that the doors wont close on an SSD, the CD relay pulsed, and this fix took care of it. We just made it a ppractice to add a cap when we took over a job.
