Delta VFD-B inverter maintenance
Model: VFD550B43A
Fault: boot display "GFF" alarm
Fault analysis: explanation: 1, GFF delta inverter fault detection circuit of DC voltage abnormal. 2, output ground protection circuit abnormalities. 3, u phase sensor circuit abnormalities. 4, w phase sensor circuit abnormalities. According to GFF fault interpretation, there may be three reasons for the failure: 1, DC voltage detection. 2, control the motherboard damage. 3, u phase, w phase sensor damage. First, detection of the first possibility. Test the input voltage is 380V, with the communication software read converter DC voltage, display as 540vdc, normal! Eliminating the DC voltage to detect the fault reason. If the above data is not normal, you can determine the DC voltage detection problem. Second, the detection of control card status. Replacement of a good control card, power, or show "GFF" fault alarm. Note that the original control card no problem. If the display is normal, set the parameters, the inverter boot operation is normal, that is the original control card bad. Need to do further board circuit maintenance. Finally, the test of u/w phase Holzer monitoring unit, which is the delta inverter failure rate is relatively high. Holzer components can be removed to test the output voltage, if it is beyond the normal range, you can determine the damage. After the detection of frequency converter through the detection process is found to be damaged Holzer components, replacement of Holzer components, the installation of the inverter power supply display normal. With motor running, the current and the actual test current is consistent with the load to the rated current, the inverter is also normal heat, the inverter repair. This fault causes more than 80% caused by the damage caused by the Holzer component. Followed by the control card analog circuit fault caused by. In very few cases, there is a voltage detection damage caused by.
No display, delta inverter phase, overcurrent, overvoltage, undervoltage, overheating, overload, grounding, parameter error, output module, display without damage, fault code, Hong Jia Wei can repair.
Jia Hong Wei repair service hotline: 0755-28916839, 13640994287 Shaw