Delta VSL fault code meaning

Series: AFE3000

S phase voltage circuit open

active front end

Meaning: S phase voltage detection error during operation.

Possible causes

• Input supply voltage fluctuation is too large.
• Input power supply phase loss
• Phase voltage imbalance
• Power supply phase sequence changes during operation
• Momentary power failure occurred
• Loose input power supply wiring terminals
• 7-27

Source: AFE3000 Series User Manual (DELTA_IA-PQ_AFE3000_UM_TC_20260330) P117