Kunshan Schneider professional service center frequency overvoltage not shown

After the open circuit boards, with a clear burning smell, visual D16 has been burnt. Fan circuit schematic shown in Figure 7 with a multimeter to measure a short across the C35, when checking to C83 (1UF) chip capacitors, the capacitor shorted. After the replacement troubleshooting. ⑹ No display machine type: ATV31HU22N4 / 2.2KW drive Symptom: No display panels, control port without + 10V, + 24V. 7 Maintenance: apart and board, with a clear burning smell, visual D16 has been burnt. Replace D16 (F65J), 24V fan is not inserted, the machine properly. Plug in the fan, showed normal, but after starting the motor, fans start to run, obviously burnt smell, then disappears. After opening the circuit boards, found D16 (F65J) and burned doubt D16 current is too small. Replacing high-current diodes, power test machine, or burn D16. According to Figure 5 Check the external circuit is normal, consider whether the current is too big fan, switch 0.1A / 24V fan (originally 0.24A / 24V fan), after burning up the line or D16, maintenance dire straits. Later, when taking into account the + 24V fan is not running properly, immediately after the fan running burn D16, D16 is not under load. Are suspected concussion increased frequency switching power supply, check the shock switch circuit chip capacitors, when found in C26 (see Figure 6), we found no capacity to return to normal after the 2200P with a capacitor to replace the machine. ⑺ No display machine type: ATV31HU55N4 / 5.5KW drive Symptom: No display panels, control port without + 10V, + 24V. Maintenance: Open circuit boards, found IGBT module has obvious signs of breakdown, open module can see the three-phase bridge module has been damaged, the model module Simon Kang production Skiip31NAB125T12. Considering the module is expensive and difficult to buy, usually in the maintenance of domestic inverter often seen with two instead of three-phase bridge rectifiers bridge. We went to the market to buy a single-phase bridge rectifiers two 35A / 1200V, and in the case of aluminum to play two holes fixed bridge heap. Bridge heap wiring trailer coupling must use heat shrink tube wrapped (to prevent electric shock), the wiring access circuit boards, machine properly energized, the modified drive has been used until now. With this method fixed a total of six 5.5KW and 7.5KW inverter. Greatly reducing maintenance costs. ⑻ No display machine type: ATV31HU22N4 / 2.2KW drive Symptom: No display panels, control port without + 10V, + 24V. Maintenance: Open circuit boards, the discovery module (FP15R12YT3) has obviously breakdown, according to FIG. 3, the peripheral circuit check module found ZD142, ZD152 (16V regulator), D143, D153 (A6), R127, R137 (120Ω) has damaged, replace the above components, power a display, but the display error code "SCF", check the manual that is motor short circuit. Motor access to the drive yet, considering the R127, R137 is damaged, replace the lower