2. Place a towel under the open end of the center hose.
3. Slowly open the high pressure valve and discharge the air conditioning system.
Attention! If the refrigerant is rapidly discharged from the air conditioning system, compressor oil may leak out of the system.
4. Check for oil stains on the towel. If so, gently close the valve.
5. After the pressure in the air conditioning system drops below 3.5 kg/cm2, open the low pressure valve.
6. Open the high and low pressure valves and slowly reduce the pressure in the air conditioning system until the pressure gauge reads 0 kg/cm2.