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HEATER, AIR CONDITIONER AND VENTILATION – On-vehicle Service HEATER, AIR CONDITIONER AND VENTILATION – On-vehicle Service 55-19 8. Start the engine. 9. Operate the air conditioner and set at the lowest temperature (MAX. COOL). 10. Fix the engine speed at 1,500 r/min. 11. Tighten the handle of the adaptor valve (valve open), and replenish refrigerant while checking the quantity through the sight glass. If the service can is inverted, liquid refrigerant may be draw into the compressor damaging it by liquid compression. Keep the service can upright to ensure that refrigerant is changed in gas state. 12. After replenishing is completed, turn the handle of the adaptor valve all the way back (valve close), and remove the quick joint. keep it for next use with the charge value and the valve of the adaptor valve being closed. DISCHARGING SYSTEM Use the refrigerant recovery unit to discharge refrigerant gas from the system. NOTE : Refer to the Refrigerant Recovery and Recycling Unit Instruction Manual for operation of the unit. REFILLING OF OIL IN THE A/C SYSTEM Too little oil will provide inadequate compressor lubrication and cause a compressor failure. Too much oil will increase discharge air temperature. When a compressor is installed at the factory, it contains 130 cm 3 of refrigerant oil. While the A/C system is in operation, the oil is carried through the entire system by the refrigerant. Some of this oil will be trapped and retained in various parts of the system. When the following system components are changed, it is necessary to add oil to the system to replace the oil being removed with the component. Condenser: 180 cm 3 Charging valve Service can (Refrigerant container) Low-pressure service valve |