Copeland Compressor EACB-0200-CAB-800

08/21/2020

Common problems and solutions of industrial chillers summarized by the maintenance master

1. Water leakage (first determine the location of the water leakage) 　　 1. The pump leaks (causes: the shaft seal at the water pump is not well connected or the shaft seal has been damaged)

07/28/2020

How much does it cost to install a 120㎡ central air conditioner? What is the standard installation process?

Nowadays, central air-conditioning has lifted the veil of mystery and has begun to enter thousands of homes, and it has gradually become a trend.

06/23/2023

Which Compressor is Used in Commercial Refrigerator?

Commercial refrigerators are essential appliances for businesses that need to store perishable goods. These refrigerators come in various sizes and designs, but they all have one thing in common a compressor.

06/14/2020

Screw refrigeration compressors are prone to these types of failures, have you ever encountered them

1. Fault type 1. Abnormal compression ratio 2. Low condenser efficiency and failure 3. Low evaporator efficiency and failure 4. Failure of the oil system 5.Electrical failure

04/03/2025

Servo Motor vs. Stepper Motor: Unraveling the Differences and Choosing the Right Fit

In the realm of automation and precision control, the choice between servo motors and stepper motors plays a pivotal role in determining the efficiency and accuracy of various systems.

06/20/2020

What are the causes of air conditioning trip

What are the causes of air conditioning trip 1. The contradiction between the rated current of the air conditioner and the current carrying capacity of the wire. 　　Here are two formulas involved: 　　①The rated current of air conditioner I=P÷U ÷power factor, the power remains unchanged, the smaller the voltage, the greater the current required. 　　② The current carrying capacity of the wire I=U÷R, the voltage is proportional to the current. 　　 So when the power supply voltage is normal, we must consider the line voltage drop. The longer the line, the greater the resistance, the greater the voltage drop, and the smaller the output current at the end. However, because the power of the load remains unchanged, the voltage becomes smaller, and the current that needs to be output will be larger. At this time, the wire is forced to overload, and the time will cause heating, and eventually cause the tripping of the open circuit. 　　 Some friends said that the heat of the wire will not cause the tripping of the circuit breaker. In fact, the manufacturer of the air switch has made it clear in the relevant manuals that the heat of the wire will cause the air switch to trip. Because the wire heats up, the crimp terminal will also heat up, and the resistance will become larger and larger. The larger the resistance, the greater the current consumption, and the hotter it will be, a vicious cycle. 　　 2. Leakage 　　During the daily maintenance work, we will encounter the situation that the air circuit trips due to the leakage of electricity. At least I have not experienced it once or twice. Regardless of the leakage of the neutral line or the leakage of the live line, a long time will cause the circuit breaker to trip. 　　Why does the electric leakage cause the MCB to trip? There are two situations. 　　 ① Good grounding. At the beginning, the leakage current was not large, and as time went by, the leakage current became larger and larger, and eventually evolved into a short circuit to ground, unable to close. 　　②There is no ground wire. If the equipment is not connected to the protective ground, when the wire leaks to the equipment, it is equivalent to adding a large shunt resistance. Like this problem, if the air conditioner does not have a ground wire, when the wire leaks to the air conditioner, the air conditioner is a very large shunt resistor and will consume a lot of current. Eventually, the wire will heat up or trip open. 　　How to determine whether the trip caused by the above two aspects can be done with a clamp ammeter. 　　 ① Measure the voltage at the input and output to see if there is a significant change in voltage drop. 　　②Measure whether the output current exceeds the standard. 　　 So my suggestion is: first measure the supply voltage to see if it is within the allowable fluctuation range. Then measure the current to see if it exceeds the rated ampacity of the wire. Finally, check the data one by one according to the measured data to find out the reason.

06/14/2020

Data Center Refrigeration System 41 Questions and Answers

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06/29/2020

What is the cause of compressor pipeline vibration

06/18/2020

Why does the return air inlet of the refrigeration compressor of the high and low temperature alternating humidity and humidity test chamber frost

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08/17/2020

Methods to prevent failures of industrial chillers

In the process of using the industrial chiller, the prevention of various failures of the industrial chiller can reduce the cost of the company's later maintenance equipment. The stable operation of industrial chillers directly affects the efficiency of e碌7館2䀀締眪湠眷