Let me know if this question is out of line. If so, I will understand. In trying to setup my new Thermidistat with 38YDB heat pump and FV4A fan coil(new construction install). I tried to set the dehumidify function on the thermidistat. The manual says that the acceptible values are from 50% - 90%. For some reason, I can't get it to go below 60%. Did the installer forget something, or am I just doing something wrong?