The programmable high and low temperature test chamber is not easy to start and the sound is very loud. When this happens: First, check the power supply voltage. If the voltage is too low, the coil current on the breaker will be too small, the contacts will not be attracted, and the compressor will not start. If the voltage is too high, the compressor will be damaged. The normal operating voltage of the programmable high and low temperature test chamber is between 370 and 390 volts. Secondly, the movable parts in the programmable high and low temperature test chamber compressors will emit a large sound when the compressor is started due to lack of oil, and it is not easy to start. Because the compressor is used for a long time, some of the lubricating oil will enter other parts, and the lubricating oil in the compressor is insufficient, so that dry friction occurs when working between various movements. At this point, the compressor can be filled with 30-50 ml of lubricating oil. In addition, the compressor is temporarily deactivated and stored improperly, causing internal parts to rust due to moisture, which is difficult to start. Again, the compressor suction and exhaust valve piece is broken, and the debris catches the gap between the moving parts, so that the parts are scraped each other when the compressor is started, which not only increases the resistance at the time of starting, but also emits an abnormal sound. Finally, the metal particles inside the system or the solder particles entering the system during the welding process enter the compressor as the refrigerant flows. When the compressor is running, the internal parts are scratched and an abnormal sound is emitted, making the compressor difficult to start. At this point, the compressor casing should be cut open for repair or replacement of the compressor. In addition to the above factors, if the programmable high and low temperature test chamber compressor is started less than 3 minutes after the shutdown, the high and low pressures in the system have not reached equilibrium and the compressor has been increased. In this case, it should be noted that the door should be opened as little as possible after the machine is stopped, and the opening time should be shortened. It is not appropriate to place too many test samples in the test box to ensure that the temperature inside the box is increased to the compressor starting temperature for more than 3 minutes, without affecting the next. Start once. Article source: Beijing Yashilin Test Equipment Co., Ltd. Lactic Acid,Biodegradable Lactic Acid,Lactic Acid Liquid,Poly Lactic Acid SHANDONG BAISHENG BIOTECHNOLOGY CO., LTD , https://www.baishengbioproducts.com