ATC2000 Automatic Temperature Control Systems Click Here to Download all of the files listed below as a compressed zip file! All Files require a PDF Viewer to View Theory of Operation ATC Components Troubleshooting Power Module Programming Schematic ATC Single Zone Schematic ATC Dual Zone Vacuum System Troubleshooting Vacuum Diagram and Logic Charts Air Conditioning Troubleshooting Guide Heater Troubleshooting ATC 2000 System Diagnostics Initial Operation and Road Testing Functional Testing and Diagnostics Return to HVAC System Trouble Shooting Guides Technical Support Home Page