Have a H800 with Innovation COP components.

Upon registering call, during button press, I get illumination for a split second. Light goes out then illuminates once door is going into slow speed at final moments of closing.

IO board appears to be functioning correctly. I am also unable to get buttons to illuminate taking field wire to ground (per instruction from EC).

Any ideas?

All hall and car buttons exhibit same symptoms?
Improper LED lamps?

Sorry for the delayed response.

Hall buttons are non-illuminated.
Correct voltage rating on boards. 16-120VAC with the input being 120VAC
Every car call button acts the same.

I am guessing I have a grounding issue, but it is quite odd that the buttons illuminate correctly once the doors go into slowdown on close. I haven't had a chance to look at it since the 29th, as I had a call-out to attend to at another customer. I need to see what relays come in and drop as the doors go into slowdown.