I have a fully Carrier system, installed by a well-respected company in Nashville TN. It's a geo system - FE4ANF005 handler, 50YDS038 heat pump and an infinity control. There are two of these systems, one for each floor - the house is 2500 sf per floor.
We have an ICF home and it's pretty tight, so the installer recommended a Carrier ERV (ERVCCLHA1200A) for air exchange. This jived with what I'd researched before building (tight homes can benefit from mechanical ventilation) so we installed one per his suggestion, and it's hooked to the downstairs unit, ducted properly (from what I've researched).
The problem is that the ERV is ALWAYS running on HIGH, even though the Infinity control is set to AUTO for Ventilator. There are several ERV settings on the control (AUTO, LOW and HIGH), but when I query the Infinity control to see what components are installed and what mode they are currently running, the heat pump and fan reports vary depending on the time of year (some times Cooling / Low Stage or Heating / Low Stage or Cooling / High Stage etc) but Ventilator ALWAYS reports HIGH. And when I go and visit the ERV in the mechanical room, it is always running unless I unplug it.
I read on this forum about a user who was complaining about an overly dry house in the winter, one that was spray-foamed and pretty tight. Turned out he had an HRV running and the forum brains (you guys) suggested that it was running too much and introducing too much outside (dry) air in the winter.
Our house is also pretty dry, and I'm wondering if the ERV needs to be addressed, because I can't imagine the system would be calling for that much air exchange.
1- Does this sound like normal operation for this equipment?
2- Is there a way to diagnose if it is communicating correctly?
Any thoughts would be appreciated!