8489

Category: Alarm

Cause

1. The regenerative resistor capacity (Pn600) is set to a value other than 0, but there is no external regenerative resistor
2. There is no external regenerative resistor, and the jumper between servo unit power terminals B2-B3 has come off
3. Poor, disconnected, or broken external regenerative resistor wiring
4. Servo unit fault

Corrective action

1. Check the external regenerative resistor connection and Pn600 value. Connect an external regenerative resistor, or set Pn600 to 0 if no regenerative resistor is needed.
2. Check the power terminal jumper wiring and connect the jumper correctly.
3. Check the external regenerative resistor wiring and wire it correctly.
4. Without turning on the main circuit power, turn on the control power again. If the alarm persists, the servo unit may be faulty. Replace the servo unit.