(LEFT BACK OF BUILDING) TRANE SPLIT FOUND VERY LOW ON R22 CHARGE. SPOKE WITH MR. CUPP REGARDING COSTLY REFRIGERANT REPAIRS. 21+ YEAR OLD SYSTEM. SPOKE WITH GINA. COLBY IS QUOTING SYSTEM REPLACEMENT. DO NOT RECOMMEND R22 REPAIRS. MONITORED (3) OTHER SYSTEMS OPERATING PROPERLY AT THIS TIME. SWITCHED ALL FANS TO AUTO.