We repaired a lot of inverters for elevators and found that many of the faults were caused by the high temperature of the working environment, which made the components easy to age. The elevator inverters were installed in the top control room of the building, often exposed to the sun in summer. The heating of the up-converter itself and the braking resistor makes the temperature in the electrical room very high, and the high working environment temperature will shorten the service life of the electronic components! The frequency converter is more obvious in this respect, so the elevator electrical room should pay attention to heat insulation in addition to ventilation problems in design, such as hollow bricks for walls and multi-layer design of the roof. If it can be equipped with air conditioner, the life of the inverter will be much longer. ! Elevator inverter repair example: today repair an Yaskawa 676GL5-15KW elevator inverter, the original reason is 380V/220V transformer protection fast-melting FU2 (600V/1.5A) blown (heat dissipation fan short circuit caused 380V / 220V transformer short circuit) The electrician of the community management office did not find out the reason and replaced the FU2 fast-melting with copper wire. After the power-on, the copper wire and the nearby circuit board were fired, and the molten copper was sprayed onto the drive board, causing two 2BI100NC-120 power modules and drives. The board is damaged, and the 100A fast melt is also blown, causing a major loss. Therefore, please pay attention to the electrician, in any case, you can not use copper wire instead of fast-melting, otherwise the damage caused to the equipment is usually very fierce and heavy! About the daily maintenance of the elevator inverter: Now the elevator is controlled by the inverter. When the inverter fails, it will cause inconvenience to many people, and it will also irritate the management personnel. If the inverter is usually maintained, Greatly reduce the failure rate of the inverter. After repairing a large number of elevator inverters, we should summarize several problems that should be paid attention to during normal maintenance: 1) The temperature of the elevator electrical room should not be too high, otherwise the inverter components are easy to age, preferably installed. Air conditioning, the effect is quite good! 2) Prevent rainwater from getting wet. Usually when the typhoon is being blown, the window door is blown by the wind and the inverter is drenched into the rain. 3) Lightning protection, this is related to the lightning protection facilities of the whole building or the whole community. The inverters that are struck by lightning are generally damaged seriously. 4) The cooling fan of the inverter should be cleaned regularly, and it should be replaced if it is loud or not running. 5) The abnormal sound of the elevator motor is usually caused by the inverter. If the three-phase current of the motor is unbalanced, it is best to repair it. If the inverter is completely out of order, the damage may be serious. If you don't have maintenance experience, don't repair it yourself. Many people make the inverter worse. ——An elevator repair company sent a Fuji VG5 inverter from Guangri Elevator to repair it. It has been repaired twice. It took a few days to burn the module, and the loss was heavy! After inspection, it is because the latex glue is applied to the bottom plate of the module with the heat-dissipating glue, and the module is poorly cooled and burned. So don't repair yourself if you don't have experience, otherwise you may waste energy, money and time! There are also the following risks (usually seen): If you buy a fake module, the drive is faulty but not detected, the wrong line is installed, the screws are not tightened, etc.! These can burn the inverter even worse! Easy Electronic Technology Co.,Ltd , https://www.yxpcelectronicgroups.com