Upon my arrival in Rosanky, I started on repairs HK12A on the A/C unit pull and clean , I was not able to bring down the indoor heat exchanger, switched cleaning to hk2C. Removed air movement system and cleaned it out side, clean the indoor heat transfer system in place, installed a performance enhancement system. Put system all back together and checked operations, pressure tested system it head and performed a vacuum on it. System is working properly at this time.