Air Conditioning (A/C) System Discharging And Recovery

AIR CONDITIONING (A/C) SYSTEM DISCHARGING AND RECOVERY

CAUTION:Electric A/C Compressor Oil only must be used as a refrigerant system lubricant for hybrid vehicles. Addition of any oil other than Electric A/C Compressor Oil to the hybrid vehicle refrigerant system will damage the electric Air Conditioning (A/C) compressor and contaminate the refrigerant system. See Refrigerant Oil Adding.

CAUTION:Do not use the R-134a Refrigerant Management Machine built-in oil injection system to inject Electric A/C Compressor Oil to the refrigerant system on hybrid vehicles equipped with an electric Air Conditioning (A/C) compressor if it has been previously used to inject PAG oil. For hybrid vehicles, use only clean manual injection tools. Injection of Electric A/C Compressor Oil into a hybrid vehicle with equipment previously used with PAG oil will contaminate and damage the hybrid A/C system.

CAUTION:An Air Conditioning (A/C) refrigerant analyzer must be used before the recovery of any vehicle's A/C refrigerant. Failure to do so puts the shop's bulk refrigerant at risk of contamination. If the vehicle's A/C refrigerant is contaminated, refer the customer to the service facility that carried out the last A/C service. If the customer wishes to pay the additional cost, use the A/C recovery equipment that is designated for recovering contaminated A/C refrigerant. All contaminated A/C refrigerant must be disposed of as hazardous waste. For all equipment, follow the equipment manufacturer procedures and instructions.
NOTE:Mazda Corporation recommends the use of R-134a refrigerant management equipment that meets the requirements of the SAE J2788 standard.
NOTE:Mazda Corporation recommends use of a R-134a Refrigerant Management Machine to carry out recovery. If a R-134a Refrigerant Management Machine is not available, refrigerant system recovery may be accomplished using a separate recovery station.
NOTE:Leaks in refrigerant system equipment, hoses or gauges can cause a leak in vacuum that may be misinterpreted as a problem with the vehicle's refrigerant system. It is necessary to leak-test all refrigerant system equipment, hoses and gauges on a weekly basis to verify that no leaks are present.
1. Prior to recovery, the purity of the refrigerant must be verified. See Refrigerant Identification Testing.

2. Connect a R-134a Refrigerant Management Machine to the low- and high-pressure service gauge port valves following the operating instructions provided by the equipment manufacturer.

3. Recover the refrigerant from the system following the operating instructions provided by the equipment manufacturer. Note the amount of oil removed during the refrigerant recovery (if any). Add that same amount back into the system once repairs are complete.

4. Once the R-134a Refrigerant Management Machine has recovered the refrigerant, switch off the power supply.

5. Allow the system to set for about 2 minutes, and observe the system vacuum reading. If the vacuum is not lost, disconnect the recovery equipment.

6. If the system does lose vacuum, repeat Steps 3 through 5 until the vacuum level remains stable for 2 minutes.

7. Carry out the required repairs.