Bids Are Invited For 1- Corrective Maintenance Service In The Freezing Chamber, Replacement Of The 3.5Hp/220V/Three-Phase Compressor. And General Gas Recharging Of The System.2- Corrective Maintenance Service On The Evaporator Ventilation System, With Replacement Of Two Low-Speed Fans.3- Corrective Maintenance Service On The Condenser Ventilation System With Replacement Of The 50Cm/220V Axial Fan.4- Corrective Maintenance Service On The Chambers Power Supply Installation, Individualizing The Electrical System. With Construction Of New Piping, Replacement Of 25A / 25A Three-Pole Circuit Breaker.5- Corrective Maintenance Service With Replacement Of The Controller And Parameterization.6- Redo The Entire Insulation System Of The Refrigeration System Piping.7- General Cleaning Of The Entire High And Low Line Piping System.8- Replacement Of The Units Filtering Element.