Charging – MAHLE RTI Matco AC880 User Manual

Page 10

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Page 9

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CHARGING

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.

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, press the “Up Arrow” key three times to display
“WEIGHT= XX.X LB” “CHARGE? 5” and press the ENTER key. The Display
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 will read
“CHECK HIGH-LOW” “CHARGE SWITCH 5”.

*

This screen will display if the AC880 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 Pressure Hose (preferred) or the Low Pressure Hose by
pressing the top or bottom (respectively) of the High-Low Charge Selector
Switch located on the rear of the AC880 beside the Fill Cylinder Port .

Note: Do Not Turn On The A/C System. SAE compliant refrigerant

handling stations, like the AC880, 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 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 on Page 13 to change the default value.) When the
AC880 has finished the Display will read “CHARGE COMPLETE” “EVAC
HOSES” and the Attention Light 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 and Low Pressure Gauges.

9.

Close the Red and Blue Hose Valves, disconnect them from the A/C System,
and go to Page 6 (Recover/Recycle) to Evacuate the refrigerant from the
Hoses.

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