Automotive service equipment, such as
refrigerant recovery machines and refrigerant charging machines, are essential tools for the maintenance and repair of vehicle air conditioning systems. Proper use of these machines not only enhances work efficiency but also ensures safety and environmental protection. Below are the correct usage methods for
refrigerant revovery machines:
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### **1. Pre-Use Preparation**
- **Check Equipment Condition**:
- Ensure the
refrigerant recovery machine is in good condition with no visible damage or leaks.
- Inspect hoses, connectors, and valves to ensure they are properly sealed.
- Verify that the power cord is intact and properly grounded.
- **Check Refrigerant Type**:
- Confirm that the
refrigerant recovery machine supports the type of refrigerant (e.g., R134a, R1234yf) used in the vehicle's air conditioning system.
- **Prepare Tools**:
- Gather necessary tools such as pressure gauges, hoses, and adapters.
- **Read the Manual**:
- Carefully read the equipment manual to understand the operating procedures and precautions.
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### **2. Operating Steps**
#### **(1) Connect the Equipment**
- Properly connect the hoses of the
refrigerant recovery machine to the high and low-pressure ports of the vehicle's air conditioning system.
- Ensure all connections are secure to prevent leaks.
- Turn on the power and start the machine.
#### **(2) Recover Refrigerant**
- If refrigerant replacement or air conditioning system repair is needed, use the machine's recovery function to collect the old refrigerant into a recovery tank.
- Monitor the pressure gauge during recovery to ensure safe operation.
- Close the recovery valve once the process is complete.
#### **(3) Evacuate the System**
- Use the
refrigerant recovery machines's vacuum function to remove air and moisture from the air conditioning system.
- The evacuation time should follow the machine's requirements, typically 15-30 minutes.
- Close the valves and turn off the machine after evacuation.
#### **(4) Charge Refrigerant**
- Add the appropriate amount of refrigerant according to the vehicle's air conditioning system requirements.
- Monitor the pressure gauge during charging to ensure the refrigerant level is within the standard range.
- Close the charging valve once the process is complete.
#### **(5) Test and Adjust**
- Start the vehicle's air conditioning system and check the cooling performance.
- Use the pressure gauge to measure the high and low-pressure sides, ensuring the system operates normally.
- Troubleshoot any abnormalities promptly.
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### **3. Post-Use Maintenance**
- **Clean the Equipment**:
- Clean the machine's surface and hoses after use to prevent dust and oil buildup.
- **Check for Leaks**:
- Inspect hoses and connectors for leaks or damage, and replace seals if necessary.
- **Store the Equipment**:
- Store the
refrigerant recovery machine in a dry, well-ventilated area, away from direct sunlight and high temperatures.
- **Regular Maintenance**:
- Periodically check the
refrigerant recovery machine's filters, valves, and hoses to ensure it remains in good condition.
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### **4. Safety Precautions**
- **Avoid Refrigerant Leaks**:
- Refrigerants can be harmful to the environment and human health. Wear protective gloves and goggles during operation.
- In case of a leak, ventilate the area immediately and stay away from open flames.
- **Prevent High-Pressure Hazards**:
- Monitor the pressure gauge during operation to avoid over-pressurization.
- Do not disassemble or modify the equipment without authorization.
- **Fire and Explosion Prevention**:
- Refrigerants are flammable. Keep the machine away from open flames and high-temperature environments.
- **Environmental Disposal**:
- Dispose of recovered refrigerants according to environmental regulations. Do not release them into the atmosphere.
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### **5. Common Issues and Solutions**
- **Slow Refrigerant Recovery**:
- Check for clogged hoses or replace the filter if necessary.
- **Abnormal Pressure**:
- Inspect the air conditioning system for leaks or blockages.
- **Machine Fails to Start**:
- Check the power connection and replace any blown fuses.
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Proper use and maintenance of
refrigerant recovery machines can improve work efficiency, extend equipment lifespan, and ensure operational safety. If you encounter any uncertainties during operation, it is recommended to consult professionals or the equipment manufacturer.
