LG ARUB115BT2 Service Manual - Page 10

Piping Diagrams Oil Return/ Defrost Operation Indoor unit Heat Exch. EEV Fan Filter Indoor unit Heat Exch. EEV Fan Filter Indoor unit Heat Exch. EEV Fan Filter Indoor unit Heat Exch. EEV Fan Filter s : Low temp./Low pressure gas : High temp./High pressure liquid : High temp./High pressure gas HR unit s s s s s s s s s s s s (Low pressure Gas Pipe) (Liquid pipe) (High pressure Gas Pipe) s s s s 4 Way Valve O/S Hot Gas By pass O/S High Pressure Gas Pipe Low Pressure Gas Pipe Liquid Pipe INV Comp Accum Liquid Injection CON Comp Sub-Cooler Pressure sensor Pressure switch Check valve EEV Sensor s Solenoid Outdoor unit Service Valve Strainer *( ) To be used only for series Copyright ©2008 LG Electronics. Inc. All right reserved. Only for training and service purposes - 10 - LGE Internal Use Only