Upon arrival, system is locked out on E71-Loss of Charge code. Used aid tool to check refrigerant pressures. System is stagnant with 180psi refrigerant system. Performed power reset to clear lockout. Performed operational test in both heating and cooling modes and cross referenced to installers manual to know whether pressure, and temperatures are within spec. Performed heating test first. After 15 minutes of run time, refrigerant pressures and temperatures are within specifications. Ground loop temperature drop is within spec. Air temperature rise is within spec. No issues with the operation of the unit were found. Found that hot water generator lines are swapped based on Waterfurnace installation manual. Disconnect and reconnect hot water generator lines to correct DHW IN and DHW OUT connections.
