Charging A/C System (Engine Off)

Control Panel:

System Charging (1 Of 2):

System Charging (2 Of 2):

Important

^ The A/C system must be evacuated prior to charging.
^ Check the LB/KG switch on the back of the unit to be sure it is set for the desired units of weight system (operate switch with main power OFF).

1. Close the low side valve on the control panel.
2. Open the high side valve on the control panel.
3. Press CHG. on the keypad to be sure the unit is in the program mode.
4. Enter the amount of refrigerant charge, to charge the A/C system by pressing the appropriate number keys. Be sure to use correct unit of weight (lb or kg).

Important

^ Charge A/C system with the correct amount of R-134a. Refer to Specifications. Do not overcharge.

5. Press ENTER.
^ A blink of the display indicates the charge amount is in the unit memory.
6. Press CHG. on the keypad to begin the charging process.
7. The display shows AUTOMATIC and the amount of refrigerant programmed for charging.
^ The display counts down to zero as the charging process proceeds.
^ At the end of the process, the display shows CPL.

Important

^ If the transfer of refrigerant stops before complete, refer to Unsuccessful Transfer.

SUCCESSFUL TRANSFER COMPLETE

1. Close the high side valve on the unit control panel (both valves should now be closed).
2. Start the vehicle and the A/C system and let run until the readings on the high side and low side gauges stabilize.
3. Check system for proper operation.

UNSUCCESSFUL TRANSFER

On rare occasions, the total charge does not transfer to the vehicle A/C system. There are two reasons why this can occur.

1. If the transfer is too slow because the pressure in the unit tank and the vehicle A/C system are about the same, the unit will emit an audible signal and the display shows the weight remaining for transfer. In this case:
A. Close the high side valve.
B. Open the low side valve.
C. Start the vehicle A/C system, and press HOLD/CONT. on the keypad. This will put the remainder of the charge into the A/C system.
D. Continue with the previous procedure. Refer to Successful Transfer Complete.
2. If the transfer will not complete and the display shows CHECK REFRIGERANT, there is not enough refrigerant in the tank to complete the process. This condition requires the recovery of the partial charge of refrigerant in the vehicle A/C system and another complete evacuation and charge procedure.
A. Press HOLD/CONT on the keypad to interrupt the cycle.
B. Press RESET to reset this unit.
C. Recover the refrigerant that has been charged into the system.
3. Add refrigerant to the tank following the manufacturer's instructions, and refer to Evacuation.