A print client, consulting us, said that his dam oc, model vfd-m/2. 2kw, reported to oc as soon as it was activated, was not functioning properly. Turning off the power and restarting it, we're still reporting oc failure and asking if we can repair it. Because the client was far away, the client sent the téda mutor over, and we came to see what the specific problem was, to determine the problem, to give you an offer and start repairing。
We, lengko, in the face of the dynamite oc alert maintenance, analyze, retest and then sort, as follows:
There are a number of situations in which the dedamoc alerts, including failure of the main circuit, module damage, poor driving of the circuit and detection of the circuit itself, need to be addressed by one. The machine was opened for general observation, and the module was repaired, and the failure was usually difficult to locate because other engineers had eliminated some obvious malfunctions, the remaining ones were hidden and the problem was cleared. But we're still ** one step at a time。
First, there is no problem with checking the main circuit, then checking the circuits, including sensors, etc., and there is no problem with checking the motors, the six-way pulses are normal, the modules are new and thoroughly checked. It's going to be hard to fix. Incentive voltages for the driving circuits were previously tested. By measuring six-way-drive current output, u-phased output current values were found to be significantly lower than the other two paths, following up the circuits, showing differences in pulsed output foot-to-ground resistance values of pc929, compared with capacity values of the other two paths, ** a higher resistance value for an electrical circuit that received a back-level power magnification was found, resulting in a smaller output-driving current bias, replacement of resistance, normal output currents, and, after testing, elimination of the oif oc alert。
Through our engineers, we have also shared a summary of the maintenance experience of the delta oc alert:
The dadar 3-way powerway on the bridge is identical and the same on the 3-way off the bridge. The same circuits have two identical nodes that can be compared, the same nodes that can be considered to have the same resistance value, the same electrical capacity, and if a bridge is used to compare the capacitation with the d values, it is provided to us with a failure clue if it is different。
The same problem arises when we in lengco report to the oc alarm failure, share and summarize the maintenance case, and then we can understand the maintenance steps and the rationale for the failure, specifically the partial damage and the approximate maintenance costs。
