Troubleshooting Refrigeration Systems: Key Points and FAQs

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Learn about common issues with refrigeration systems and how to troubleshoot them effectively. This article provides key points on identifying and addressing problems, as well as insightful FAQs for a better understanding of refrigeration system maintenance.

Identifying and Addressing Common Issues

⚙️The temperature controller and defrost clock were stuck, causing the drawers to not shut properly.

⚠️The compressor in the rack was flooding back and the sight glass was flashing.

🔧The technician plans to use service gauges to throttle down the suction valve and reduce the liquid refrigerant coming back to the compressor.

🔩Loosen the packing and actuate the valve stem using an adjustable wrench.

🔒Ensure the system has calmed down and tighten the caps to minimize leaks.

Preventive Measures and System Shutdown

❌Closing the king valve stops the flow of refrigerant

🔇The king valve shuts down the entire system

⏩The compressor continues to pump and push refrigerant back on the suction line

🔊The speaker fills up the system to the liquid level to avoid the hassle of figuring out the total flooded charge.

🔍Refrigerant leaks are common in the pressure control's bellow section, but no leaks are observed.

FAQ

What are the common causes of refrigeration system issues?

Common causes include stuck temperature controllers, compressor flooding back, and low refrigerant charge.

How can I prevent leaks in the system?

Tighten caps to minimize leaks and check for potential floodback and low superheat.

What should I do to shut down the entire system?

Closing the king valve stops the flow of refrigerant and shuts down the entire system.

How can I avoid the hassle of determining the total flooded charge?

The speaker fills up the system to the liquid level to avoid the hassle of figuring out the total flooded charge.

What are the potential issues with the pressure control valve?

Refrigerant leaks are common in the pressure control's bellow section, but no leaks are observed.

Summary with Timestamps

🔧 0:17The video discusses a customer complaint about a malfunctioning lowboy drawer unit and the technician's plan to fix it.

🛠️ 3:27The video demonstrates how to connect an adjustable wrench to loosen the packing and actuate the valve stem on a system with potential floodback and low superheat.

🤔 6:55The system is being pumped down by closing the king valve, stopping the flow of refrigerant while the compressor continues to pump.

🔍 10:00The speaker is checking for refrigerant leaks in a system.

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