I just had a new system installed, Trane XL16i heat pump, XC 80 furnace, and XL 950 thermostat. System was up and running. Signed off on paperwork, wrote check and installers left. So I came in to begin setting up the thermostat, and it was dark, and won't respond in any way. Since it's only been up and running about an hour, am I missing something or is there a problem. Already contacted company, but they're gone for the day.