Really due to hardware problems provoked speed shake inverter is very few, because the frequency conversion equipment design has a lot of maintenance functions, such as overcurrent, overvoltage, undervoltage, overheating, overload, lack of phase and other alarms, when the onset of these alarms, and can not reset the situation of the onset, can be used for the inverter is hardware problems, of course, the premise is that the peripheral wiring is normal, the motor and load without any problems.
If the power is not displayed, often the switching power supply burns, forming that the motherboard does not work with power supply, and the display screen does not appear.
There are also some conditions where the no-load operation is normal, and the overcurrent overload alarm with the load, these are generally caused by the problem of the drive circuit, or the lack of withstand voltage of the module.
If it is acceleration and deceleration overcurrent, often the bus capacitor is aging, this situation of course also has to be modified to replace the capacitor.
As for the onset of short circuit tripping, smoke or peculiar smell during operation, of course, it can artificially burn the components inside, and it can not continue to be used.
Some of the motherboard is broken and appears normal, but can not withstand the control logic and start the operation, in the case of restoring the factory value, resetting the sweeping parameter disorder, can also be considered that the inverter is broken.