MAHLE RTI RHS780 - Manual (Page 10)

September 24, 1999 Page 9
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
C H A R G E ? 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
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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
W E I G H T = X X . X L B
C H A R G I N G
C H A R G E C O M P L E T E
E V A C H O S E S 5
ENTER
CHARGING
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 “Up Arrow” key three times to display
“WEIGHT= XX.X LB” “CHARGE? 5” and press the ENTER key. The Display (6)
will read “ENTER CHARGE” “AMOUNT= XX.X LB 5”.
5. 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.
6. 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).
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.
7. Press the ENTER key to start charging.
The Display (6) will read “WEIGHT= XX.X LB” “CHARGING” as refrigerant
leaves the Charging Cylinder. The weight displayed will be increasing from zero
to the Charge Amount entered in Step 5 plus a one ounce (0.03 KG) “Over
Charge” set at the factory to compensate for hose loss. (See Setting Over
Charge Amount [only] on Page 13 to change the default value.) When the
RHS780 has finished the Display (6) will read “CHARGE COMPLETE” “EVAC
HOSES” and the Attention Light (7) will turn ON.
8. Press the ENTER key to return to the Main Menu. The A/C System can now be
turned on and tested by monitoring the High (5) and Low (1) Pressure Gauges.
9. Close the Red (14) and Blue (13) Hose Valves, disconnect them from the A/C
System, and go to Page 6 (Recover/Recycle) to Evacuate the refrigerant from
the Hoses.