Fuji inverter troubleshooting and maintenance
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(2) Low-frequency output oscillation failure When the inverter outputs at a low frequency (below 5Hz), the output/reverse direction of the motor output frequently pulsates. Generally, the inverter's main board has a problem.
(3) Oscillation fault in one acceleration zone When the inverter appears in the low-frequency three-phase imbalance (expressing motor oscillation) or oscillates in a certain acceleration interval, we can try to modify the carrier frequency (decrease) of the inverter. Solve the problem.
(4) Operation without output fault This fault is divided into two cases: First, if the LCD display shows the output frequency and voltage rise after the inverter is running, and the measurement output has no voltage, the driver board is damaged; second, if the inverter is running, The output frequency and voltage displayed on the LCD monitor always remain at zero, which is a problem with the motherboard.
(5) The running frequency does not rise Fault: When the inverter is powered on, press the run button, the operation indicator is on (keyboard operation), but the output frequency always shows "0.00" does not rise, generally the driver board has a problem, change the block After the new driver board can solve the problem. However, if the inverter is able to rise to the set frequency during no-load operation and stays at about 1Hz with the load, it is because the load is too heavy, and the “instant overcurrent limit function†of the inverter is activated. At this time, it is modified. Parameter solving; such as F09→3, H10→0, H12→0, the three parameters can be restored to normal after modification.
(6) There is no display failure on the operation panel When this fault occurs in the G/P9 Series, the charging resistor or the C19 capacitor of the power driver board may be damaged. If the fault occurs on the inverter of the large-capacity G/P9 series, the internal contact may not be present. Suction caused. For G/P11 small-capacity inverters, in addition to problems with the power supply board, the small circuit board on the IPM module may also be a problem; for a machine with a capacity of 30G11 or more, the power supply board may fail to provide a fuse FUS1 for the main board. No fault on power-up. When the motherboard has a problem, it will also cause power failure.
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