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ov
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Overvoltage
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There are surge voltages in the input power supply.
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Connect a DC reactor to the drive.
Note:
If you turn the phase advancing capacitors ON and OFF and use thyristor converters in the same power supply system, there can be surge voltages that irregularly increase the input voltage.
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The drive output cable or motor is shorted to ground (the current short to ground is charging the main circuit capacitor of the drive through the power supply).
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Examine the motor main circuit cable, terminals, and motor terminal box, and then remove ground faults.
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Re-energize the drive.
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The power supply voltage is too high.
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Decrease the power supply voltage to match the drive rated voltage.
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Electrical interference caused a drive malfunction.
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Examine the control circuit lines, main circuit lines, and ground wiring, and decrease the effects of electrical interference.
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Make sure that a magnetic contactor is not the source of the electrical interference, then use a Surge Protective Device if necessary.
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Set L5-01 ≠ 0 [Number of Auto-Restart Attempts ≠ 0 times].
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Note:
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The drive detects this error if the DC bus voltage is more than the ov detection level when the Run command has not been input (while the drive is stopped).
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The ov detection level is approximately 410 V with 200 V class drives. The detection level is approximately 820 V for 400 V class drives.
- If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
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