MAHLE RTI RHS780 - Manual (Page 9)

September 24, 1999 Page 8
W E I G H T = X X . X L B
A U T O M A T I C ? 5
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W E I G H T = X X . X L B
V A C U U M ? 5
ENTER
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A / C H A S P R E S S U R E
G O T O R E C Y C L E 5
ENTER
E N T E R V A C U U M
T I M E X X M I N 5
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P E F O R M L E A K
T E S T ? Y / N 5
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A D D O I L ? Y / N 5
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S T A R T ? 5
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T I M E L E F T = X X M I N
P U M P O N
P U M P O F F X X M I N
C O N T I N U E ? 5
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A D D O I L N O W
C O N T I N U E ? 5
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DEEP VACUUM
1. Setup the RHS780 as shown on Page 4 and then turn the Main Power Switch (3)
ON.
2. Attach the Red (14) and Blue (13) Hoses to the A/C System per the vehicle
manufacturer's instructions and open the Red (14) and Blue (13) Hose Valves.
3. Using the Keypad (2), press the “Up Arrow” key two times to display “WEIGHT=
XX.X LB” “VACUUM? 5” and press the ENTER key. The Display (6) will read
“ENTER VACUUM” “TIME XX MIN 5”.
* This screen will display if the RHS780 senses a pressure in either the High (14)
or Low (13) 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 (6) 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 RHS780 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 (6) 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 RHS780 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 (6) will
read “START? 5”.
7. Press the ENTER key to start the Vacuum Pump.
The Vacuum Pump will turn On, the Display (6) will read “TIME LEFT=XX MIN”
“PUMP ON” and the minutes remaining will count down on the Display (6). The
Vacuum Pump will turn OFF when the Display (6) reads zero minutes.
8. If a Vacuum Leak Check was selected by choosing Y in Step 5 the Display (6)
will read “PUMP OFF XX MIN” “CONTINUE? 5” and the Attention Light (7) will
turn ON. The elapsed time since the Vacuum Pump turned OFF will count up on
the Display (6). An increasing pressure on the Vacuum Check Gauge (4) 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 (6) will read “ADD
OIL NOW” “CONTINUE? 5”, and the Attention Light (7) will turn ON. Refer to
Figure 4 and add oil to the side, either High (16) or Low (9) 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, (16) or (9), and leaving it open until the correct amount of oil has left the
Oil Charge Bottle, (16) or (9). Close the valve on the Oil Charge Bottle, (16) or
(9), and press the ENTER key to return to the Main Menu.