DCM2: AC complete, replaced (12) 12x24x1 and (2) 20x20x1 filters checked belt. RTU is from 2003 running on R22 refrigerant. System is operating properly at this time and refrigerant pressures and temperatures are appropriate for indoor and outdoor weather conditions however due to age of equipment multiple part failure is possible at anytime. Training rom system is fully functional and operating within manufacturer specifications at this time, refrigerant pressures and temperatures are appropriate for indoor and outdoor weather conditions.