Reynolds inverter overhaul process

1) Query and query fault phenomena. The fault phenomenon of the inverter is varied, for example, the same type of problem may have different problem phenomena, and different types of problems may have the same kind of problem, which brings difficulties to find the problem. However, the problem phenomenon is the fundamental basis for overhauling the inverter problem, and it is the starting point of the inverter problem maintenance, so it is necessary to carefully inquire and analyze the problem phenomenon, find out the most important and typical aspects of the problem phenomenon, and find out the time, place, and environment of the problem.

Reynolds inverter overhaul process

2) Understand the fault. Before starting to overhaul the faulty inverter, in addition to asking and understanding the situation before and after the inverter is damaged, it is also necessary to understand the phenomenon of the moment the problem occurs. For example, whether there has been smoke, abnormal noise, oscillation, etc., and whether there is a "man-made failure" caused by others disassembling and repairing.

3) Try the inverter to be repaired. Regarding the faulty inverter, it is necessary to deepen the understanding of the inverter problem through audition, trial, trial and other methods. The maintenance sequence is: appearance view, power lead check and measurement, after no abnormality, turn on the power supply, press the corresponding switches, adjust the relevant knobs, listen carefully to the sound and inquire whether there is any abnormal phenomenon in the inverter, and then analyze according to the information grasped to identify the parts that may cause problems.

4) Fault finding. According to the schematic diagram of the inverter circuit and the wiring diagram of the printed circuit board, after analyzing the working principle of the inverter and forming a suspicious problem point in the repair idea, the corresponding position should be found on the printed circuit board, and the detection instrument should be used to test on the road or not on the road, and the measured data should be compared with the normal data, and the scope of the problem should be analyzed and gradually narrowed, and finally the problem point should be found.

5) Cleaning of faults. After the fault point is found, reasonable repair measures should be taken according to the characteristics of the failed components or other abnormal conditions. For example, for dry detachment or virtual toughness, it can be used from scratch: for component failure, the qualified components of the same type of specification should be replaced: for short-circuit faults, the cause of the short-circuit should be found out and then the symptomatic clean-up.

6) Restore debugging, after replacing the components, the inverter should be fully or partially debugged, because even if the replacement of the component type is the same, it will also cause performance differences due to working conditions or some parameters are not exactly the same, and some components themselves must be adjusted. If it roughly conforms to the original parameters, it can be powered on for commissioning, and if the inverter is fully recovered, it is clear that the problem has been eliminated: otherwise, it should be debugged from scratch until the inverter is fully restored to normal.

Reynolds inverter overhaul process

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