Delta ALBA3 fault code meaning

Delta / ALBA3

Series: ASDA-H3

Second power supply module - DC Bus undervoltage

servo drive

Meaning: 1. The main circuit voltage is below the specified voltage. The default severity of this alarm is warning (WARN). To change it to alarm (ALM), set P2.066 [Bit 9] to 1. 2.DC Bus voltage is less than P8.094 × √2.

Possible causes

Conditions:
The main circuit voltage is below the specified voltage. The default severity of this alarm is warning (WARN). To change it to alarm (ALM), set P2.066 [Bit 9] to 1.
DC Bus voltage is less than P8.094 × √2. Causes:
The main circuit input voltage is below the rated permissible voltage.
No input voltage in the main circuit.
Power supply input error (incorrect power supply system).

Source: ASDA-H3 User Manual (DELTA_IA-ASD_ASDA-H3_UM_SC_20260428) P814