Attention should be paid to the following matters during the use and maintenance of the appearance of the instrument:
1. Don't blindly knock and bump when overhauling, so as not to expand the problem, and the more you repair, the worse it will become.
2. Do not plug and unplug various control boards and plugs with electricity. Because in the case of power-on, plugging and unplugging the control board will produce a strong induced electromotive force, and the instantaneous counterattack voltage is very high, and it is very simple to damage the corresponding control board and plug.
3. When using the logic pen and oscilloscope to detect the signal, it is necessary to pay attention not to make the probe contact the two measurement pins together, because the essence of this situation is to form a short circuit in the case of power-on.
4. When disassembling and adjusting the appearance, the original orientation should be recorded for restoration.
5. When detecting the filter capacitor in the power supply, the positive and negative poles of the electrolytic capacitor should be short-circuited first, and do not use the pen wire instead of the wire to discharge the capacitor when the short circuit is short-circuited, because it is simple to burn the core wire. You can take a 220V, 60-100W lamp with a lamp head lead, connect it to both ends of the capacitor, and the bulb will light up at the moment of discharge.
6. When repairing the appearance of the problem in a humid environment, it is necessary to use a multimeter to test whether the points of the printed circuit are smooth, because the primary problem in this case is copper foil corrosion.
7. When overhauling the internal circuit of the surface, if the contacts and circuit boards of the device components are coated with insulating varnish, the parameters of each point can be welded to the table pen of the multimeter with ordinary hand-sewn needles, so as to pierce the paint layer and directly measure each point without peeling off the paint layer in a large area.
8. When using a multimeter ohm, remember not to measure with electricity.
9. When repairing the appearance of fine instruments, if you accidentally bounce small parts away, you should first identify the places that may fly, do not look for them in the east or turn them in the west, and you can use magnet scanning and line of sight scanning methods to find them.
In short, in the repair of the appearance of the instrument, first of all, we should understand the basic principles of the appearance of the instrument, and grasp the knowledge and skills related to electronics, and should prepare all the technical information such as instructions and drawings of the appearance of the instrument, and should develop a good working essence, so as to improve efficiency and reduce errors in the repair of the appearance of the instrument.
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Schneider inverter fault repair
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Fault title: Inverter communication problem.
Cause of the failure: Communication abort on the inverter communication bus.
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Schneider appeared at the 5th China Power Distribution Technology Summit Forum
Beijing, China, September 14, 2020 – Today, the 5th China Power Distribution Technology Summit Forum 2021, held by China Electric Power Research Institute Co., Ltd. and the Science and Technology Development Service Center of China Electric Power Council, opened in Beijing. The theme of this forum is "Supporting the Strategic Policy of Carbon Peaking and Carbon Neutrality, Building a ...
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