Short to ground power supply unit

What does F380 mean?

This fault indicates a ground short within the power supply unit, a connected Indramat DIAX04 SSE-03VRS drive controller, the motor, or the motor cable, leading to an unsafe condition or current imbalance.

• Ground short in the power supply unit itself.
• Ground short in a connected drive controller.
• Ground short in the motor or the motor cable.

Click steps to track your progress.

1. 1

   De-energize the power supply unit and all connected drive components, and apply lockout/tagout procedures.

2. 2

   Disconnect the motor power cables from the drive controller. Perform insulation resistance tests (megger) on each motor phase to ground and phase-to-phase, expecting resistance >1 MΩ.

3. 3

   Disconnect the power cables from the Indramat DIAX04 SSE-03VRS drive controller to the power supply unit. Perform insulation resistance tests on the drive controller's output terminals to ground.

4. 4

   Systematically reconnect components one at a time, energizing between steps, to isolate the component causing the ground fault.

5. 5

   If the ground fault persists with all external connections removed, the fault is likely internal to the Indramat power supply unit, requiring its replacement.