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MAC2000 Operation
5. Again press Start to continue. The unit now displays “Set Flush
Time.” Set the flush time by pressing and holding down the
Increase or Decrease key until the desired time is shown. Press
Start to accept the flush time shown on the screen. A minimum
flush time of 30 minutes is recommended.
Important! There must be a minimum of 12 pounds of refrigerant in
the internal storage tank in order to complete the System Flush
process. A message will be displayed if additional refrigerant needs
to be added. Add additional refrigerant by following the procedure
described in Section 3.8 Internal Tank Manual Refill.
6. Press the Start key to begin flushing. The MAC2000 begins
flushing the A/C system in the following manner:
• The A/C system is first completely filled with refrigerant,
during which time the screen shows “Flushing – Charging.”
• The system is now flushed for the time duration set in Step 5,
during which time the screen shows “Flushing system.”
• After the system is flushed, all refrigerant is automatically
recovered. The screen shows “Recovering refrigerant”
during this process.
• The flush cycle completes by draining the oil that was removed
during the flushing process into the unit’s oil drain bottle (see
MAC2000 Left-Side View, Page 5). The screen shows
“Draining oil” during this process.
Important! All oil was removed from the A/C system during the
System Flush operation. Be 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.
7. The unit beeps and its red light flashes to indicate that the
flushing cycle is complete. The screen now reminds the technician
to remove the inline flushing adapter, and to reinstall the orifice
tube or TXV valve.
8. Evacuate and then recharge the A/C system per Sections 3.4
and 3.5.
Instruction 2072-0400 23