| A.02 | Parameter Breakdown | Abnormal EEPROM data in amplifier | Reset parameters, replace amplifier if persistent |
| A.03 | Main Circuit Encoder Error | Power circuit detection abnormal | Inspect main circuit, repair amplifier |
| A.05 | Motor/Amplifier Combination Error | Servo motor and amplifier capacities mismatch | Use correct motor-amplifier pair |
| A.10 | Overcurrent / Heat Sink Overheated | Excessive current through IGBT or heat sink overheating | Check load, cooling, replace power stage if necessary |
| A.30 | Regeneration Error | Faulty regenerative circuit or resistor | Inspect/replace regenerative resistor |
| A.32 | Regenerative Overload | Energy exceeds regenerative resistor capacity | Use correct resistor, adjust deceleration |
| A.40 | Overvoltage | DC bus voltage excessively high | Check power input, supply stability |
| A.41 | Undervoltage | DC bus voltage too low | Check power supply, incoming AC |
| A.51 | Overspeed | Motor speed excessively high | Inspect feedback, parameters, load |
| A.71 | Overload (High Load) | Motor operated at torque well above rating for several seconds | Reduce load, check bearings, inspect axis |
| A.72 | Overload (Low Load, continuous) | Motor operated continuously above torque rating | Reduce continuous torque, improve cooling |
| A.81 | Absolute Encoder Backup Error | Backup supply for encoder failed, position data lost | Replace battery/power supply, reinitialize |
| A.82 | Encoder Checksum Error | Abnormal encoder memory checksum | Replace encoder |
| A.83 | Absolute Encoder Battery Error | Low battery voltage for encoder | Replace encoder battery |
| A.84 | Absolute Encoder Data Error | Abnormal absolute position data | Replace encoder, check cabling |
| A.86 | Encoder Overheated | Encoder internal temperature too high | Improve cooling, replace encoder if damaged |
| A.C8 | Absolute Encoder Clear Error | Encoder multi-turn data not cleared/set correctly | Reset/initialize encoder |
| A.C9 | Encoder Communication Error | No communication between drive and encoder | Replace encoder or cable |
| A.Cb | Encoder Echo-back Error | Encoder communication data mismatch | Replace encoder, check connectors |
| A.CC | Multi-turn Limit Disagreement | Encoder and amplifier multi-turn data mismatch | Reset/reinitialize encoder |