Bacharach 2072-0400 Operating And Maintenance Instructions Manual
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MAC2000 OperationNote: The MAC2000 will automatically restart the recovery processif the unit senses a rise in the A/C system’s pressure.5. After recovering the refrigerant from the A/C system, close theservice-port valves, and then remove the hoses from the vehicle.Observe that the service hoses should remain under vacuum. Thisensures that no contaminants are introduced into the A/C systemduring a recharge process.6. The technician can now begin repairs on the A/C system.3.4 Vacuum Mode (Evacuation)The Vacuum mode is used to remove residual air and moisture fromthe vehicle’s A/C system by pulling the system into a deep vacuum.This mode is most often used after completing a repair that requiredopening the A/C system to the atmosphere. Moisture and/or air in anA/C system can cause erratic operation and must be removed beforerecharging the system with refrigerant.Evacuate a vehicle’s A/C system as follows:1. If not already done, plug the MAC2000 into a properly groundedAC outlet; set the Power switch to ON; then wait until the unitcompletes its self diagnostics. The screen will display “Selectmode” when ready.2. Connect the high- and low-side service hoses to their respectiveservice ports on the vehicle’s A/C system; then open the A/Csystem’s service-port valves.3. Press the Vacuum mode function key and observe that the screenreads “Set VACUUM TIME now.” The minimum evacuation timeis 3 minutes. To change this time, press and hold the Increase keyuntil the desired time is shown.4. Press the Start key to begin the evacuation process.Note: Before evacuation begins, the MAC2000 checks if pressure ispresent in the vehicle. If pressure is sensed, the unit will display themessage: “Error: You have pressure in the hoses. You mustfirst recover this refrigerant before proceeding.” If this errormessage appears, first abort the evacuation process by pressing theReset key, recover the system per Section 3.3, then restart theevacuation process by pressing the Vacuum mode function key.5. The evacuation process continues for the amount of time set inStep 3. If a vacuum level of at least 27 inHg is not achieved withinthe prescribed time, the evacuation process automaticallycontinues for a maximum of 7 minutes, or until 27 inHg isInstruction 2072-0400 19 |
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