From the PLC or network scanner:
: High incoming voltage from the power supply that exceeds the drive's safe operating limits. Regenerative Energy
: This frequently involves the communication card or the physical wiring of the CAN network. Recommended Troubleshooting Steps danfoss error 1027
If a standard reset doesn't work, you can try a to return the drive to factory settings.
| Cause | Likelihood | Explanation | |-------|------------|-------------| | | High | Low-ohm short (<< rated value) draws excessive current, killing the IGBT. | | Wiring short | Medium | Brake resistor cable chafed, terminal box moisture, incorrect polarity (if using DC bus braking). | | Brake resistor value too low | Medium | Resistor ohms below minimum allowed for the drive model. | | IGBT natural failure | Medium | Age, thermal cycling, poor quality power supply, or voltage spikes. | | Control board / gate drive fault | Low | Faulty gate driver keeps IGBT turned on. | From the PLC or network scanner: : High
The most frequent reasons for this error include external power fluctuations or internal motor-related issues:
: Defective EEPROM data on either the power card or the control card. | | IGBT natural failure | Medium |
Faulty option card, incorrect address, or damaged local cable segment. Isolate that drive’s cabling first.
From the PLC or network scanner:
: High incoming voltage from the power supply that exceeds the drive's safe operating limits. Regenerative Energy
: This frequently involves the communication card or the physical wiring of the CAN network. Recommended Troubleshooting Steps
If a standard reset doesn't work, you can try a to return the drive to factory settings.
| Cause | Likelihood | Explanation | |-------|------------|-------------| | | High | Low-ohm short (<< rated value) draws excessive current, killing the IGBT. | | Wiring short | Medium | Brake resistor cable chafed, terminal box moisture, incorrect polarity (if using DC bus braking). | | Brake resistor value too low | Medium | Resistor ohms below minimum allowed for the drive model. | | IGBT natural failure | Medium | Age, thermal cycling, poor quality power supply, or voltage spikes. | | Control board / gate drive fault | Low | Faulty gate driver keeps IGBT turned on. |
The most frequent reasons for this error include external power fluctuations or internal motor-related issues:
: Defective EEPROM data on either the power card or the control card.
Faulty option card, incorrect address, or damaged local cable segment. Isolate that drive’s cabling first.