Delta AL0A2 fault code meaning
Delta / AL0A2
Series: ASDA-H3
Power module DC Bus overvoltage
servo drive
Meaning: The main circuit voltage is higher than the specified voltage.
Possible causes
- Condition: The main circuit voltage is higher than the specified voltage. Cause:
- The main circuit input voltage is higher than the rated allowable voltage.
- Power supply input error (incorrect power supply system).
- Power supply module hardware fault.
- An incorrect regenerative resistor is selected for a power supply module rated 45 kW or below, or no external regenerative resistor is connected.
Source: ASDA-H3 User Manual (DELTA_IA-ASD_ASDA-H3_UM_SC_20260428) P795
Series: ASDA-W3
Power supply module (PM) DC Bus overvoltage
servo drive
Meaning: The main circuit voltage is higher than the specified voltage.
Possible causes
- Condition: The main circuit voltage is higher than the specified voltage. Cause:
- Incorrect regenerative resistor selection or no external regenerative resistor connected.
- The main circuit input voltage is higher than the rated allowable voltage.
- Incorrect control gain parameter or motion profile settings.
Source: ASDA-W3 Series Servo System Application Technical Manual (DELTA_IA-ASD_ASDA-W3_UM_SC_20251226) P753