Delta AL025 fault code meaning

Delta / AL025

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

Encoder internal error

servo drive

Meaning: Encoder internal memory error and internal counter error.

Possible causes

Condition: Encoder internal memory error and internal counter error. Cause:
Encoder internal error (internal memory error and internal counter error).
At power-on, the motor is rotating due to mechanical inertia or other factors.

Source: ASDA-A3 User Manual (DELTA_IA-ASD_ASDA-A3_UM_SC_20230515) P1153; ASDA-B3 User Manual (DELTA_IA-ASD_ASDA-B3_UM_SC_20250108) P890; ASDA-E3 (DELTA_IA-ASD_ASDA-E3_UM_SC_20260313) P615; ASDA-E3C-E Application Technical Manual (DELTA_IA-ASD_ASDA-E3C-E_UM_SC_20260612) P539; ASDA-E3C-L Application Technical Manual (DELTA_IA-ASD_ASDA-E3C-L_UM_SC_20260612) P411; ASDA-H3 User Manual (DELTA_IA-ASD_ASDA-H3_UM_SC_20260428) P773; ASDA-W3 Series Servo System Application Technical Manual (DELTA_IA-ASD_ASDA-W3_UM_SC_20251226) P726