Internal Fault

What does -InF mean?

This fault signifies a general internal malfunction within the drive controller, possibly related to internal circuitry or connections. Electromagnetic interference (EMI) can sometimes induce such faults, or it could be a hardware failure. Continued operation with an internal fault is not possible and requires immediate attention to prevent further damage or unexpected behavior.

• Electromagnetic interference (EMI) exceeding the drive's immunity levels, affecting internal control logic or processors.
• Malfunctioning internal power supply components (e.g., DC-DC converters) on the control board within the drive.
• Loose internal connections or ribbon cables within the drive enclosure, leading to intermittent signal loss.
• Corruption of internal firmware or memory due to severe power fluctuations or unexpected shutdowns.
• Aging or defective internal components (e.g., capacitors, ICs) failing due to thermal stress or lifespan limitations.

Click steps to track your progress.

1. 1

   Cycle input power (L1, L2, L3) to the drive controller completely OFF for 5 minutes, then switch ON again.

2. 2

   Verify proper grounding of the drive controller and motor according to installation guidelines. Measure ground resistance.

3. 3

   Inspect the drive's internal components for visible damage (e.g., bulging capacitors, burnt resistors) if safe and accessible (power OFF).

4. 4

   Check all internal ribbon cable connections within the drive controller for secure seating and proper alignment (power OFF).

5. 5

   Review the input power quality for transient voltage spikes or sags using a power quality analyzer.