Short to ground power supply unit
Indramat · CLM01.3-M Flying Cutoff Control
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.
Common Causes
- Ground short in the power supply unit itself.
- Ground short in a connected drive controller.
- Ground short in the motor or the motor cable.
Repair Steps & Checklist
Click steps to track your progress.
- 1
De-energize the power supply unit and all connected drive components, and apply lockout/tagout procedures.
- 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
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
Systematically reconnect components one at a time, energizing between steps, to isolate the component causing the ground fault.
- 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.