MAHLE RTI RHS780 - Manual (Page 11)

December 9, 2002 Page 10
W E I G H T = X X . X L B
A U T O M A T I C ? 5
ENTER
R E C Y C L E H O L D
T I M E X X M I N 5
><
ENTER
E N T E R V A C U U M
T I M E X X M I N 5
><
ENTER
P E F O R M L E A K
T E S T ? Y / N 5
<
ENTER
A D D O I L ? Y / N 5
<
ENTER
E N T E R C H A R G E
A M O U N T = X X . X L B 5
><
ENTER
*
L O W L E V E L , G O T O
F I L L C Y L I N D E R 5
ENTER
C H E C K H I G H - L O W
C H A R G E S W I T C H 5
ENTER
C H E C K H O S E S
S T A R T ? 5
ENTER
W E I G H T = X X . X L B
C O M P R E S S O R O N
AUTOMATIC
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. Determine the refrigerant capacity of the A/C System to be charged.
Note: 1 oz = 0.02835 Kg & 1 Lb = 0.45359 Kg
4. Using the Keypad (2), press the ENTER key when the Display (6) reads
“WEIGHT= XX.X LB” “AUTOMATIC? 5” (this is the default screen of the Main
Menu.) The Display (6) will read “RECYCLE HOLD” “TIME XX MIN 5”.
The Recycle Hold Time is the amount of time that the RHS780 waits for “out-
gassing” or for the pressure in the A/C System being recovered to rise enough to
automatically restart the recovery process. The minimum value is two (02)
minutes. The value entered is stored in memory and comes up as the default the
next time the procedure is used.
5. Press the “Up Arrow” key to change the value of the field. Press the “Right Arrow”
key to change to a different field. Press the ENTER key to accept the value. The
Display (6) will read “ENTER VACUUM” “TIME XX MIN 5”.
6. Press the “Up Arrow” key to change the value of the field. Press the “Right Arrow”
key to change to a different field. Press the ENTER key to accept the value. The
Display (6) will read “PERFORM LEAK” “TEST? Y/N5”.
7. 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”.
8. 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
“ENTER CHARGE” “AMOUNT= XX.X LB5”.
9. 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 “CHECK
HIGH-LOW” “CHARGE SWITCH 5”.
* This screen will display if the RHS780 Charge Cylinder contains less refrigerant
than the entered value. When this occurs, the charging Cylinder should be filled
using the Fill Cylinder procedure on Page 5. Press the ENTER key to return to
the Main Menu.
10. Based on the vehicle manufacturer’s instructions, choose Charging through either
the High (14) Pressure Hose (preferred) or the Low (13) Pressure Hose by
pressing the top or bottom (respectively) of the High-Low Charge Selector Switch
(10) located on the left side of the RHS780 above the Fill Cylinder Port (11).
Press the ENTER key when finished programming. The Display (6) will read
“CHECK HOSES” “START? 5”.
Note: Do Not Turn On The A/C System. SAE compliant refrigerant handling
stations, like the RHS780, supply refrigerant in the liquid phase.
Adding liquid refrigerant to a running A/C System may cause
immediate A/C compressor failure.
11. Press the ENTER key to start the RHS780 Automatic sequence.