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82 AIR CONDITIONING 4 ADJUSTMENT Evacuation and recharging 1. Add refrigerant oil to compressor if necessary. CAUTION: When a major repair has been 3. Connect a Refrigerant Station to the high and low pressure servicing connections. CAUTION: Whenever the refrigerant and recharging the system. 4. Operate the refrigerant evacuation system according to the manufacturer’s instructions. NOTE: If the vacuum reading is below system and check for leaks using an electronic CAUTION: The system must be evacuated and recharging is not permitted. 5. Operate the refrigerant recharging system according to the manufacturer’s instructions:- Refrigerant required to charge system: 6. If the full charge has not been accepted by the system, start the engine and run it at 1500 7. Consult Refrigerant Station Manual for correct procedure to complete the charge. 8. Carry out the air conditioning system performance test. LEAK TEST SYSTEM The following instructions refer to an electronic type CAUTION: When a major repair has been 1. Place the vehicle in a well ventilated area but free from draughts, as leakage from the system 2. Follow the instructions issued by the manufacturer of the particular leak detector 3. Commence searching for leaks by passing the detector probe around all joints and components, 4. Insert the probe into an air outlet of the evaporator or into the evaporator drain tube. 5. Insert the probe between the magnetic clutch and compressor to check the shaft seal for 6. Check all service valve connections, valve plate, head and base plate joints and back seal plate. 7. Check the condenser for leaks at the pipe unions. 8. If any leaks are found, the system must be discharged before rectification. 9. Rectify any leaks and recheck for leaks during evacuation prior to charging. Leak test using inert gas Use Nitrogen or Helium gas. 1. Connect gas line to recharging station. |