RC-80 problem

elmerbug

Member
Folks,
I have a new OmniLT, firmware 3.0, with a new RC-80. They are not communicating. I assume I am being dense and missing something obvious. I've been methodical about diagnosis:

1) Checked wiring
2) Used different wire
3) Tried 2 new RC-80s
4) Tried 2 new OmniLTs
5) Put a digital multimeter on the thermostat output on the controller. I see 5-seconds of ~250mv followed by 55 seconds at ~14 mv every minute
6) Verified thermostat node ID (1)
7) Verified comm settings (1)
8) Verified settings for non-programmable

Can you help me see what I am missing?
TIA,
Don
 
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