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Operation MAC2000
3.3 Recovery Mode
The recovery mode removes all refrigerant from the vehicle’s A/C
system and stores it in the unit’s internal storage tank. Before
recovery begins, however, there must be pressure in the hoses. This
prevents inadvertent recovery of air or other contaminants from a
leaking system. The MAC2000 will automatically sense the presence
of refrigerant and confirm that it is not contaminated before starting
the recovery process.
Begin the refrigerant recovery process as follows:
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 Recovery mode function key and observe the following
message: “Hook-up the service hoses to vehicle.”
3. At this time hook up the service hoses, open the A/C system’s
service-port valves, and then press the unit’s Start key. The
refrigerant identifier will warm up, zero itself, and then display
the message “Analyzing sample, please wait . . .”
If the refrigerant is contaminated (meaning that it has somehow
been mixed with some other kind of refrigerant), the results will be
displayed along with the word “contaminated.” Note that the
unit will not allow the recovery operation to proceed when
refrigerant is contaminated.
If the refrigerant is found to meet specifications, the unit will
automatically proceed to recover the refrigerant. During the
recovery operation, refrigerant is removed from both the high and
low side of the vehicle’s A/C system. The screen will display
“Recovering refrigerant” along with showing the amount of
refrigerant being recovered.
4. When the A/C system has been recovered to a minimum vacuum of
9 inHg, the recovery process automatically stops. The following
events then occur:
• The unit’s red light flashes and the beeper sounds, signaling
the technician that recovery is complete.
• The screen reads “Recovery complete” and shows the weight
of the recovered refrigerant.
• System oil is automatically drained into the oil drain bottle (see
MAC2000 Left-Side View, Page 5).
18 Instruction 2072-0400