E005.1
INOVANCE
MD520 VFD
Bus overvoltage
⚠ Olası Nedenler
- Output grounding
- Encoder interference/wire breakage
- Power generation during motor deceleration
- Fault reaction upon runaway of synchronous motor
- Braking resistor selection error
- Braking resistor phase loss
- Overshoot upon speed reach in vector control
- V/f oscillation
- AC drive model setting error
✓ Çözüm Adımları
- Check output side for short circuit
- Check encoder cable connection and grounding
- Enable overvoltage suppression or connect braking resistor
- Shorten overspeed protection time by setting F9-67 and F9-68
- Ensure braking module power not lower than AC drive power
- Check braking resistor is properly connected
- Configure RFG with rounding time and acceleration feedforward
- Enable oscillation suppression function
- Set AC drive model correctly
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