| 1 | Over-current | Short circuit in the motor or power branch, incorrect motor wiring, defective power section | Measure motor cable U/V/W and motor for short circuit and ground fault; insulation measurement; visual inspection for burnt components | Correct wiring, replace damaged motor cable or motor, repair or replace power transistor module / Servopack |
| 2 | Circuit protector tripped | Motor protection switch / MCCB in the main circuit has tripped | Check input fuse, circuit breaker, and mains voltage | Eliminate the cause of overload or short circuit, reset the protective device, check inrush current limitation or switch-on behavior if necessary |
| 3 | Regenerative trouble | Regenerative resistor not connected, interrupted, or regenerative transistor defective | Check connection terminals of the braking resistor, measure resistance value | Connect or replace regenerative resistor correctly, repair/replace defective regenerative stage in the Servopack |
| 4 | Over-voltage | DC link voltage too high (mains voltage too high, strong braking processes) | Measure mains voltage, assess braking processes and load inertia, check regenerative path | Bring mains voltage into the permissible range, use a larger braking resistor if necessary, or parameterize acceleration/deceleration ramps softer |
| 5 | Overspeed | Motor speed too high, reference signal too large, or feedback faulty | Measure analog setpoint voltage, check encoder signals, check mechanics for blockages | Adjust setpoint limitation and parameters, check encoder/wiring, repair mechanics |
| 6 | Voltage drop | Undervoltage in the main circuit, mains dip, or intermittent supply line | Measure mains voltage under load, check supply lines and terminals | Stabilize mains supply, tighten cross-sections and terminals, use a separate transformer if necessary |
| 7 | Overload | Continuous overload, motor or drive running at current limit | Check current consumption, heating, and load profile | Reduce load, optimize motion and cycle profiles, provide a larger motor/amplifier if necessary |
| 8 | Heat sink overheat | Servopack heat sink overheated, fan air missing, cabinet too warm | Check ambient temperature in the control cabinet, ventilation, and contamination on the heat sink | Improve airflow, clean filters and heat sink, ensure fan function, thermally relieve the drive |