AC 5. Pengisian Freon, Pengosongan, Pevakuman, Pengisian Oli Kompressor AC | Refrigrant Conditioning

Summary

This video tutorial provides a comprehensive guide on how to empty, vacuum, and refill an automotive AC system. It starts by explaining how to check the AC system's functionality and the condition of the machine. The process then covers connecting the manifold gauges, evacuating refrigerant, and using a vacuum pump to remove contaminants and moisture. The video also explains the importance of adding compressor oil and accurately recharging the AC system with freon, ensuring proper pressure readings. The entire procedure emphasizes safety and efficiency in maintaining an optimal AC system.

Takeaways

• 😀 Always begin by checking the functionality of the vehicle's engine and AC system before starting any work.
• 😀 Ensure the AC system's indicators (fan, condenser, blower, and magnetic clutch) are working properly.
• 😀 Use a manifold gauge to connect to the AC system, ensuring it is properly sealed before starting the evacuation process.
• 😀 The evacuation process should aim for a high and low-pressure reading close to 0 PSI. Do it gradually to avoid oil spillage.
• 😀 Use a vacuum pump after evacuation to remove moisture and contaminants from the AC system, improving system performance.
• 😀 The vacuum pump should run for about 30 minutes to ensure complete removal of moisture from the system.
• 😀 After vacuuming, check for leaks by observing pressure stability over 15 minutes. If the pressure remains constant, there are no leaks.
• 😀 Add compressor oil after evacuating the system, ensuring the correct amount based on the amount removed during evacuation.
• 😀 To add oil, use a vacuum technique to prevent air from entering the system, which could affect system performance.
• 😀 When refilling refrigerant (freon), ensure the refrigerant tank is connected securely and there are no leaks.
• 😀 Monitor pressure levels while refilling the system. The target for the high-pressure gauge should be around 100 PSI for training purposes, while low pressure should be around 10 PSI.

Q & A

What is the first step in the AC servicing process as described in the script?

The first step is to check the engine and AC system functionality. This includes verifying if the engine is working well and if the AC system is functioning correctly, such as checking the indicator lights, blower, and magnetic clutch.

How do you connect the manifold during the evacuation process?

You connect the red hose to the high-pressure port and the blue hose to the low-pressure port. The yellow hose, initially connected to the outside air, is later connected to the vacuum pump for evacuation.

What should you observe if the system is functioning properly during the evacuation step?

During the evacuation, if the system is functioning properly, the pressure gauges (high and low) should eventually approach zero, indicating the system is empty of Freon.

Why is it important to open the valves slowly during the evacuation?

Opening the valves slowly helps prevent excessive oil from being expelled along with the Freon. If the valves are opened too quickly, more oil may escape, which is undesirable.

What is the purpose of the vacuuming process in AC servicing?

The purpose of vacuuming is to remove any moisture and contaminants (like air or water vapor) from the AC system to ensure the system operates effectively and the refrigerant fills the system without issues.

How long should the vacuum pump be left running during the vacuuming process?

The vacuum pump should be left running for at least 30 minutes to ensure that all moisture and contaminants are properly removed from the AC system.

What do you need to do after the vacuuming process is complete?

After vacuuming, you must close the high-pressure and low-pressure valves tightly to prevent any air from entering the system, and then turn off the vacuum pump.

How do you confirm that the system is leak-free after the vacuuming process?

You wait for 15 minutes after turning off the vacuum pump. If the pressure reading remains steady and does not move towards zero, it indicates there are no leaks in the system.

Why do you need to add oil to the compressor after the Freon is removed?

Oil is added to the compressor to replace the oil lost when Freon is removed from the system. This helps ensure the compressor operates smoothly without excessive wear.

What is the target pressure when filling the system with Freon, and why is this important?

The target pressure for Freon filling is between 200 and 220 PSI for a standard car system. However, in training systems, the target is typically set lower, around 100 PSI, to ensure proper functioning without overloading the system.