Cause : DynBrk Transistor comes when the braking transistor is not operating properly or the braking transistor is damaged or the Inverter’s control circuits are faulty.

1. Disconnect the Braking Resis- tor wiring, turn ON the power supply again, and operate the motor. If the power supply is turned ON while the Braking Resistor wiring is connected, the Braking Resistor or Inverter may overheat and be damaged.
2. Replace the Inverter if the fault continues to occur.