Aimike VFD Frequency Converter AMK3800-4T0450G
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06/20/2020
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.
01/07/2022
If your refrigerator has been in use for some time, there may be some faults with the compressor. To troubleshoot the compressor, check whether there is abnormal noise or overheating phenomenon in the relay.
06/14/2020
After a long time, the refrigerator always has thick frost ' Every time you clean the refrigerator head It's a knife, a shovel, and a screwdriver. The refrigerator is still broken
06/14/2020
Is it necessary to install the fresh air system recommended during decoration Where are the people who have been eating ash for many years but are secretly happy this year Is it necessary for ordinary families to install fresh air system?
05/11/2022
Whether there is a fault in the indoor and outdoor units can be known by the access code of the remote control, the content of the green LED
09/22/2020
Since compressed air inevitably contains impurities such as solids, liquids, and gases, and each has its own characteristics, it cannot be achieved with a single device. Therefore, compressed air drying and purification becomes a system, a complete compressed air The drying purification system includes: 1) gas-liquid separator; 2) filter; 3) drying equipment and other facilities.
09/11/2020
In terms of operating efficiency and saving energy consumption, the use of automatic control valves is an indispensable part. The manual valves and pneumatic valves commonly used in traditional industries are not as good as electric valves in terms of installation cost and efficiency.
06/24/2020
Turn off the power supply of the air conditioner first; if all the light leaks, then you must evacuate before adding it; find the thick tube under the outdoor unit and add fluorine from here; you need to install the pressure gauge when adding fluorine Generally, it can be stopped at about 5 pressures; the temperature needs to be turned to the lowest when turning on the machine, and observe for about half an hour.
07/09/2020
The Global Refrigerant Compressors Market report covers the adverse impact of COVID-19 (Corona Virus Disease 2019) on the global Refrigerant Compressors market. The Coronavirus (COVID-19) pandemic has brought several changes in the Refrigerant Compressors market conditions and have also affected every aspect the business sector.
06/14/2020
The frost formation of the cold storage refrigeration evaporator should be comprehensively analyzed from various aspects. The design of the evaporator, the evaporator spacing between the fins, and the piping arrangement should be optimized as a whole. The 器2 䀀 ᅵ皥 䖒皦즠Ʋ嫜ི 㲈Ʋ 䌁皦 ᮔDž༬皧嫦ིЀ 呄ᠾ鹨់༹皧 ࠄ 00령ꐱ댁珵뛐珵Љ 䕄ྦ 뤂ᐱ뚜珵 ᴴᏩ呄ᠾ퍘ᒥ 鹨់ᩄ ꋔྦ 瑉浥 巠皱㙲皦抐皱 巠皱 ੨皦柘皱 ᅵ皥 ب 巠皱㙲皦忈皱 ੨皦柘皱 즠Ʋǜ 勁皦즠Ʋب ǜ V / 펔B䌁皦 ᮔDž '鱤džၜ먢䇨珵呈ᠾ뤂ᐱ ⿇⬿먲僧