Bacharach 2072-0400 manual 3.5Charge Mode

Operation MAC2000

achieved. When the A/C system reaches the proper vacuum, the unit’s red light and beeper signal evacuation is complete, and the screen reads “Vacuum complete.” If the proper vacuum is not achieved after 7 minutes of evacuation, the process stops, and the technician is prompted to check for a leak.

Note: Depending on the altitude, the A/C system may not be able to achieve 27 inHg. It is important that the altitude setting in the Set- Up menu is correct for your location. The MAC2000 uses this information to calculate and provide an equivalent set point for your altitude. (For instance, at 6000 feet the equivalent set point for your altitude pulls to 22 inHg before completing evacuation).

6.Press the Reset key to return to the Main menu.

7.The technician can now proceed to charge the system.

3.5Charge Mode

The Charge mode is designed to add a precise amount of refrigerant to the vehicle’s A/C system. This mode can be used to either “top off” a system, or do a complete recharge after the system has been evacuated or flushed. The unit has a built-in default charge amount of 2 pounds (0.91 kg). Other charge amounts can be entered in increments of either 0.06 pounds, 1 ounce, or 0.02 kg.

1.If not already done, plug the MAC2000 into a properly grounded AC outlet; set the Power switch to ON; then wait until the unit completes its self diagnostics. The screen will display “Select mode” when ready.

2.Press the Charge mode function key and observe that the message “Hook-up the service hoses to vehicle” should appear. If not already done, connect the high- and low-side service hoses to their respective service ports on the vehicle’s A/C system, and then open the system’s service-port valves.

Note that at the start of this step, before the service hoses are connected, the MAC2000 first checks if the service hoses are under a vacuum. This prevents air and other contaminants from being introduced into the A/C system. If the message “The vehicle is not properly evacuated” appears, perform one of the following:

•If the refrigerant in the A/C system has just been recovered, evacuate both the system and the service hoses per Section 3.4.

•If the A/C system needs to be “topped off,” first ensure that the service hoses are disconnected from the vehicle; then either recover the hoses per Section 3.3 if they contain refrigerant, or evacuate the hoses per Section 3.4 if they contain air.

20 Instruction 2072-0400