Alerton VAV Tux

[JohnBuckingham]

I have a problem with 3 Alerton VAV Tuxes:

There is a checkbox on the graphic called "Emergency Close". I believe it's DO08. It's always checked on these 3 tuxes. When I uncheck the checkbox, it checks itself again in a second or two. I've tried to find something in the DDC program that's doing it, but no success.

The tuxes are slaved, but I have others that are slaved where this doesn't happen.

Any ideas?

[Suds]

Is there a VAV subroutine in the APEX DDC that may be writing to that DO?

[JohnBuckingham]

Is there a VAV subroutine in the APEX DDC that may be writing to that DO?

I assume that's whats happening, I think the DDC program is the only thing that can override me. I'm not too sharp on Alerton DDC, but I tried searching the program for both the tux number and "DO08" with no luck.

[Suds]

Typically the only way to turn the emerg open and close DO's on and off is via the display. Otherwise DDC somewhere must be writing to it. Try using the "cross-referencing" feature to find "ZT-DO-8" in the APEX DDC. ZT is a zone tux point used in APEX sub-routines.