Inverter: DC link current alarm (L axis)

What does b mean?

An abnormal current condition has been detected in the DC link for the L-axis. This can be caused by short-circuits or ground faults in power leads or motor windings, an incorrect motor ID setting, or a failure of the motor or SVM itself.

• Short-circuit between power lead phases or ground fault in them.
• Short-circuit between motor winding phases or ground fault in them.
• Incorrect motor ID setting.
• SVM failure.
• Motor failure.

Click steps to track your progress.

1. 1

   Measure insulation resistance between power lead phases (U-V, V-W, U-W) and to ground for the L-axis.

2. 2

   Measure insulation resistance between motor winding phases (U-V, V-W, U-W) and to motor frame ground for the L-axis.

3. 3

   Verify the motor ID setting in the SVM parameters matches the installed L-axis motor.

4. 4

   Visually inspect power leads for the L-axis for signs of short-circuits or damaged insulation.