Bacharach 2072-0400 manual 3.6System Flush Mode Oil Flush

Operation MAC2000

7.If more refrigerant needs to be added, press the Additional Charge function key. Otherwise, press the Done function key to exit the Snap-Shot mode.

8.Close the service-port valves; remove the service hoses from the vehicle; then press the Start key to recover the hoses.

Important! If the hoses are not removed from the vehicle before the Start key is pressed, the refrigerant in the vehicle will be recovered!

9.If any oil was removed during the recovery or evacuation process, make sure that the proper amount of oil is added back into the vehicle’s A/C high side port in accordance with the vehicle manufacturer’s recommendations. Add an amount of new oil equal to the amount collected in the oil drain bottle (see MAC2000 Left- Side View, Page 5).

3.6System Flush Mode (Oil Flush)

The System Flush mode is designed to be used on General Motors vehicles using their Oil Flush Adapter and Filter accessory. This accessory is attached inline with the vehicle’s compressor and is used to flush the A/C system with refrigerant. In this mode, refrigerant is circulated through both the A/C system and the MAC2000 where an oil separator removes the oil and returns oil-free refrigerant back into the A/C system for further flushing. At the end of the cycle, the refrigerant is completely removed from the A/C system and stored in the unit’s internal storage tank. The flushing process can take up to 30–45 minutes to complete. Because of the variety of A/C system configurations currently in service, the flush may bypass certain sections of the A/C system. To ensure the complete system is flushed, the technician may need to pinch off certain hoses to force the refrigerant flush throughout the system.

1.Before beginning the flushing process, recover all refrigerant from the vehicle’s A/C system per Section 3.3 Recovery Mode.

2.From the Main menu, press the Next menu function key to display Menu 2, and then press the System flush function key to select the System Flush mode. The unit reminds the technician to “Please empty the purge oil bottle prior to flushing.”

3.Press Start to continue. The unit now reminds the technician to install the inline flushing adapter and remove the orifice tube or TXV valve before continuing.

4.If not already done, connect the high- and low-side service hoses to their respective service ports, and ensure that the service-port valves are open.

22 Instruction 2072-0400