I have modified my normal airconditioner's out door unit by disconnecting its Condensor and instead connecting a copper pipe buried loop in the ground. My system is 9kw system (3 HP). The ground loop (copper pipe) is about 96 metre (315 feet) in length burried at about 1.5 metre depth (5 feet depth) (summer average temperature at this depth is about 73 F ). The system is located at Brisbane, Australia. After charging up the system (R22), I am getting very high superheat (34 F), very low subcooling (5 F), Compressor head pressure and temperature is high (240 PSI and 183 F)and draws high current. Can any one comment on what is going on here.