Daily maintenance and troubleshooting of the inverter - Solutions - Huaqiang
1. Daily inspection to check whether the installation location and environment are abnormal; whether the cooling air passage is unblocked; whether the fan is normally blown; whether the inverter, motor, transformer, reactor, etc. are overheated and smelly; whether the motor sound is normal; the main circuit and control of the inverter Whether the voltage of the loop is abnormal or not; whether the filter capacitor leaks, cracks, smells, and the safety valve is out; whether the display part is abnormal; whether the control button and the adjustment torque are malfunctioning. 1-Piece Fir Tree Cable Tie,Oval Mount Cable Tie,Oval Mount Zip Tie,Oval Head Cable Tie Wenzhou Langrun Electric Co.,Ltd , https://www.langrunele.com
2. Regular inspection and maintenance Stop the inverter before opening the cover of the inverter, and confirm that the main circuit capacitor is discharged. Clean dust and dirt on the air inlet, heat sink and air filter of the fan to make the air path unblocked; use the blower to blow off the dust on the printed board and check whether the screws are loose, especially the copper strip The high-current connecting screws must be tightened and must not be loosened. Some of them may be loosened due to annealing or fracture deformation of the copper piece. The elastic gasket must be replaced and tightened; check whether the insulation is corroded, overheated, discolored and deformed; measure the insulation resistance with a megohmmeter Should be in the normal range (the voltage of the megohmmeter should be appropriate, generally use 500V megohmmeter, when measuring, it is necessary to determine whether the line terminal varistor operates, to prevent misjudgment. There is high voltage in the megohmmeter, it is forbidden to measure the printed board Wait for the weak part).
The wearing parts should be replaced within a certain period of use. The main wearing parts are fans and filter electrolytic capacitors. Use a multimeter to confirm the correctness of the control voltage of each control line, check the adjustment range, and do a protective action test to confirm that the protection is effective. Measure the imbalance of the inverter output voltage; measure whether the input and output line voltage is within the normal range.
The inverter is not used for maintenance for a long time. The time for the electrolytic capacitor not to be energized should not exceed 3 to 6 months. Therefore, it is required to pass the power once every other time. If the newly purchased inverter is more than half a year to one year away from the factory, it must also be First pass the low voltage no load, after a few hours, let the capacitor recover and use.