MAHLE RTI RHS780 - Manual (Page 10)

December 9, 2002 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.