Checked operation of thermostats. Changed configuration in installer set up menu. Ductless system -Mitsubishi SUZ-KA09NA2 SN: 92U00606 w/ MRCH2 thermostat. According to Mitsubishi tech support, the refrigerant pumping system is bad and should be replaced. Ductless system -Mitsubishi SUZ-KA09NA2 SN:92U00608 w/ MRCH2 thermostat. Tested components and sensors. Everything is within specifications. Called tech support, unable to speak with them yet.