Delta AL028 fault code meaning

Delta / AL028

Series: ASDA-A3, ASDA-B3, ASDA-E3, ASDA-E3C-E, ASDA-E3C-L, ASDA-H3, ASDA-W3

Battery voltage error or internal encoder error

servo drive

Meaning: Battery voltage exceeds the specification (> 3.8V), or an encoder signal error occurred.

Possible causes

Condition: Battery voltage exceeds the specification (> 3.8V), or an encoder signal error occurred. Cause:
Battery voltage too high.
Internal encoder error.
Motor fault.

Source: ASDA-A3 User Manual (DELTA_IA-ASD_ASDA-A3_UM_SC_20230515) P1154; ASDA-B3 User Manual (DELTA_IA-ASD_ASDA-B3_UM_SC_20250108) P891; ASDA-E3 (DELTA_IA-ASD_ASDA-E3_UM_SC_20260313) P616; ASDA-E3C-E Application Technical Manual (DELTA_IA-ASD_ASDA-E3C-E_UM_SC_20260612) P540; ASDA-E3C-L Application Technical Manual (DELTA_IA-ASD_ASDA-E3C-L_UM_SC_20260612) P412; ASDA-H3 User Manual (DELTA_IA-ASD_ASDA-H3_UM_SC_20260428) P774; ASDA-W3 Series Servo System Application Technical Manual (DELTA_IA-ASD_ASDA-W3_UM_SC_20251226) P727