Danfoss Compressor SZ380A6PAU

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

Scroll compressor 2020 or will enter the dark moment

Affected by factors such as product competition and the weakening of downstream demand, in the context of the overall downturn in the HVAC industry,

06/14/2020

Top 3 Applications for a Servo Motor

Servo motors are essentially electric motors with inbuilt motor

08/08/2020

What factors need to be considered in the selection of quick freezers

How should food processors choose a freezing system to ensure the best solution and the most suitable business development? When deciding which food freezing process to apply to the food processor’s production line,

06/23/2020

What is the reason why the freezer is not cooling

It may be that the capillary is blocked and the refrigerant flow does not enter the evaporator. It may also be that the refrigerant needs to be replenished or the refrigeration system is leaking. If the buffer tube inside the compressor ruptures, there may be loose screws or it will cause no cooling. It is also possible that the expansion valve and the discharge valve are not adjusted properly, causing cold air to leak out. Need to check one by one, and then take the medicine.

08/31/2020

Detection and evaluation of dust removal and nitrogen addition equipment in the food processing field

In the Midwestern United States, most food manufacturing plants use compressed air and on-site nitrogen production to produce and package a variety of foods. When the electricity price is 4.5 cents/KWh, the manufacturer's annual expenditure on the energy consumption of the compressed air system is $430,344.

08/14/2020

What to pay attention to when building a chiller room

What should I pay attention to when building a chiller room? The machine room is to allow the chiller to have an independent and stable operating environment, avoid wind and sun, and various debris or dust to damage the unit

01/04/2021

Noise control of a two-stage screw refrigeration compressor

Noise control of a two-stage screw refrigeration compressor From a Department of Compressor Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, 710049 Shaanxi, China b Suzhou Academy, Xi’an Jiaotong University, 215123 Jiang器2䀀
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07/07/2020

Earth Hour: Hitachi Central Air Conditioner works with you to speak for the earth

09/27/2023

Industrial Water Chiller Repair: Troubleshooting and Maintenance Tips

An industrial water chiller is a critical component in many manufacturing and industrial processes. It is responsible for cooling various types of equipment, which helps to prevent overheating and maintain optimal performance.