Upon inspection, system is off with no callcfrom thermostat. 8nspection of unit shows no obvious visual damage or problems. Attempted test run through Aurora Aid Tool. System cam on in cooling but refrigerant head pressure climbed quickly and shut down on high pressure switch. Further inspection found that the flow center pump is not getting 230V power. Traced power loss to both resetable 3A fuses in side of electrical compartment housing. Current using two 3A disposable fuses for test running. 3A fuses could replaced with factory resettable fuse. While test running, refrigerant pressures are tested within spec. Ground loop is low on pressure at approximately 20psi when it should be between 40-70psi. Pressure loss can be normal as ground loop pipes expand and conteact over the years. This will not hurt the system unless there is a complete blowout, but it does hinder the efficiency of the unit. Repressurize ground loop from 20psi to 60psi from house water supply. is operating properl
