Hey All, I have to apologize for the absence. I've had many things going on in my life over the summer. Primarily family and running 2 businesses. Stress levels high, time very limited. I'll be more present here now! I wanted to share these images and get any feed back if possible. Someone pulled the VFD interface off and bypassed it on this Carrier RTU. They then ran the control wire for the fan contactor from G to C. Fan would only engage in cooling or fan on. Not in heating as a thermostat doesn't power G. Anyone had trouble with these VFDs? I'm wondering why I found it like this.

Posted by HVAC Know It All at 2023-09-09 16:53:48 UTC