Delta DCNB fault code meaning
Delta / DCNB
Series: AFE3000
Neutral point imbalance
active front end
Meaning: The voltage difference between the upper and lower capacitors exceeded the imbalance threshold during operation.
Possible causes
- Supply voltage error
- Frequent load fluctuations
- 7-25
Source: AFE3000 Series User Manual (DELTA_IA-PQ_AFE3000_UM_TC_20260330) P115