X D X HELP!!!

[smitty1968]

Ok, I ran a call today; the walk in temp was 50 deg.
Frozen coil! I looked to check the TXV and I didn’t
see one in the evap.

I now understand the entire rack system is controled
by an XDX controler system.

With zero Info on this cold zone rack system, I now seek
any and all Info on this system.

I can not stand being In the dark on something like this.
I will visit the cold zone web site and, check
other search engines.

But I would like any info you guys could come up with.

[icemeister]

The only XDX deal I'm aware of is the magic "Black Box" that's installed after the TXV. Have they expanded their abilities?

Here's a link to an old thread that contains a link to an even older thread about XDX:

http://hvac-talk.com/vbb/showthread.php?threadid=37163