Preventive And Corrective Maintenance At All Costs Of Refrigeration And Air Conditioning Equipment Type Chiller, Vrv And Direct Expansion As Well: Lot 1. Aires Chiller Brand Trane, Lot 2. Aires Chiller Brand Lg, Lot 3. Aires Vrv Brand Daikin, Lot 4 Type Direct Expansion And Refrigerators, In Accordance With The Technical Specifications Described In The Technical Annex