F0021 DC Link Undervoltage fault in weg drive
F0021 DC Link Undervoltage fault in weg drive
Cause: Input voltage is too low or the DC bus voltage dropped below the minimum permitted value. May also indicate a pre-charge circuit failure.
Remedy:
Cause: Input voltage is too low or the DC bus voltage dropped below the minimum permitted value. May also indicate a pre-charge circuit failure.
Remedy:
- Verify if the input voltage matches the drive's rated voltage.
- Check for voltage sags or brownouts in the power supply.
- Inspect the pre-charge circuit/resistor if the fault occurs immediately at power up.
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