MAHLE RTI Matco AC880 User Manual
Page 9
Page 8
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H A S
P R E S S U R E
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DEEP VACUUM
1.
Setup the AC880 as shown on Page 4 and then turn the Main Power Switch
ON.
2.
Attach the Red and Blue Hoses to the A/C System per the vehicle
manufacturer's instructions and open the Red and Blue Hose Valves.
3.
Using the Keypad, press the “Up Arrow” key two times to display “WEIGHT=
XX.X LB” “VACUUM? 5” and press the ENTER key. The Display will read
“ENTER VACUUM” “TIME XX MIN 5”.
* This screen will display if the AC880 senses a pressure in either the High or
Low Pressure Hoses. When this occurs, the A/C System must be emptied
using the Recover/Recycle procedure on Page 6. Press the ENTER key to
return to the Main Menu.
4.
Press the “Up Arrow” key to change the value of the field. Press the “Right
Arrow” key to change to a different field. The value entered must be greater
than zero. Press the ENTER key to accept the value. The Display will read
“PERFORM LEAK” “TEST? Y/N5”.
5.
Press the “Right Arrow” key to move the cursor between Y and N to select
whether or not the AC880 pauses at the end of Vacuuming so that a vacuum
leak can be detected in the A/C System. Press the ENTER key to accept the
Yes or No choice. The choice entered is stored in memory and comes up as
the default the next time the procedure is used. The Display will read “ADD
OIL? Y/N5”.
6.
Press the “Right Arrow” key to move the cursor between Y and N to select
whether or not the AC880 pauses at the end of Vacuuming (or Vacuum Leak
Checking) to allow the Adding of Oil to the A/C System. Press the ENTER
key to accept the Yes or No choice. The choice entered is stored in memory
and comes up as the default the next time the procedure is used. The Display
will read “START? 5”.
7.
Press the ENTER key to start the Vacuum Pump.
The Vacuum Pump will turn On, the Display will read “TIME LEFT=XX MIN”
“PUMP ON” and the minutes remaining will count down on the Display. The
Vacuum Pump will turn OFF when the Display reads zero minutes.
8.
If a Vacuum Leak Check was selected by choosing Y in Step 5 the Display
will read “PUMP OFF XX MIN” “CONTINUE? 5” and the Attention Light will
turn ON. The elapsed time since the Vacuum Pump turned OFF will count up
on the Display. An increasing pressure on the Low Pressure Gauge is
evidence of a vacuum leak in the A/C System. Press the ENTER key to
return to the Main Menu or to Add Oil if selected in Step 6.
9.
If Adding Oil was selected by choosing Y in Step 6 the Display will read “ADD
OIL NOW” “CONTINUE? 5”, and the Attention Light will turn ON. Add oil to
the correct side, either High or Low, based on the vehicle manufacturer’s
instructions, of the A/C System that will then be Charged during the Charging
procedure on Page 9 by opening the valve on the Oil Charge Bottle and
leaving it open until the correct amount of oil has left the Oil Charge Bottle.
Close the valve on the Oil Charge Bottle and press the ENTER key to return
to the Main Menu.