Refer to the precautions at the beginning of this section.
The procedure below should be used to check and/or fill the refrigerant charge in the air conditioning system. To verify proper charge level, evacuate (reclaim) and recharge system to the proper refrigerant level. Refer to the underhood A/C label for the proper charge level. Use the refrigerant recovery station to charge the refrigerant. Using the refrigerant recovery and recycling unit, refill the refrigerant.
After all refrigerant system leaks have been repaired and the refrigerant system has been evacuated, a refrigerant charge can be injected into the system. For the proper amount of the refrigerant charge, refer to the under hood HVAC Specification Label. Always use a R-134a refrigerant recovery/recycling/charging station that meets SAE Standard J2210 to charge the refrigerant system with R-134a refrigerant. Refer to the operating instructions supplied by the equipment manufacturer for proper care and use of this equipment.
Evacuate the refrigerant system (refer to the Discharging the System section of this manual).
- Connect a manifold gauge set and an R-134a refrigerant recovery/recycling/charging station that meets SAE standard J2210 to the refrigerant system.
- Measure the proper amount of refrigerant and heat it to 52° C (125° F) with the charging station. See the operating instructions supplied by the equipment manufacturer for proper use of this equipment.
- Open both the suction and discharge valves, then open the charge valve to allow the heated refrigerant to flow into the system.
- When the transfer of refrigerant has stopped, close both the suction and discharge valves.
- If all of the refrigerant charge did not transfer from the dispensing device, open all of the windows in the vehicle and set the heating-A/C system controls so that the A/C compressor is engaged and the blower motor is operating at its lowest speed setting. Run the engine at a steady high idle (about 1400 rpm). If the A/C compressor does not engage, test the compressor clutch control circuit and repair as required.
Open the low-side valve to allow the remaining refrigerant to transfer to the refrigerant system.
CAUTIONTake care not to open the discharge (high pressure) valve at this time. Failure to follow this warning could result in possible personal injury or death.
- Disconnect the charging station and manifold gauge set from the refrigerant system service ports.
- Reinstall the caps onto the refrigerant system service ports.