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Old 05-10-2020, 01:48 PM   #15
Stajones's Avatar
Holiday Rambler Owners Club
Join Date: Sep 2012
Location: FullTimers
Posts: 99
Originally Posted by Old-Biscuit View Post
Sorry Stan
Not up to snuff on those Dual Zone T-stat wiring

T-stat goes to Front A/C and then cable goes to Rear A/C Unit
Bad connections?
Use swap and some alcohol to clean up

Just an update for anyone who was following:

Finally figured out that phone/data cable jumper from front to rear units (Zone 1 to Zone 2) was reverse (phone) wired. The harness cables with the unit were data wired (as they should be).
Also appears that the reason (my hypothesis) that I had “poorly mounted” 4 pin RJ-11 jacks on my control boards (which I damaged doing original troubleshooting) was because it was a dealer “fix” to replace and reverse wire in the field if you’re coach originally had regular phone cables in the coach - and later had an upgrade to the 5 button/heat pump Pelican units. Makes sense to me but like I said...my hypothesis.
I connected a phone/fax splitter in line with the Z1 to Z2 cable and lo’ & behold - I see Z2 on the thermostat and the unit is back in the fold...circle of trust...a true Golden Guardian’s Gang member fighting the West TX afternoon heat!
Stan & Deb
'98 HR Imperial 40WS, Can-Am Spyder & Prius on platform tow dolly
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