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ErrorLib — Industrial Fault Code Library

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F8091

Power section defective

Indramat · Indradrive

What does F8091 mean?

This fatal error indicates a failure within the IndraDrive's power section, which is responsible for converting and supplying power to the motor. This could involve issues with IGBTs, power capacitors, or other high-power components, making the drive unable to control the motor.

Common Causes

  • Internal component failure in the power stage (e.g., IGBT short, open circuit).
  • Sustained overcurrent or overheating leading to component damage.
  • External short circuit or ground fault on the motor side.
  • Power supply quality issues (e.g., overvoltage, spikes) damaging the power section.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Disconnect the motor from the drive. Power up the drive and see if the fault persists. If it clears, the problem is likely with the motor or cabling.

  2. 2

    With power off and DC bus discharged, check motor power cables for short circuits between phases and to ground.

  3. 3

    Inspect the drive's power section visually for signs of damage (e.g., burnt components, discolored PCBs).

  4. 4

    Verify the input power supply to the IndraDrive is stable and within specified voltage limits.

  5. 5

    If the fault persists after ruling out external issues, the IndraDrive power section is defective and requires replacement or repair by a qualified service center.

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

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Source: Indramat Indradrive
Open Manual (Page 7)Search more codes in this manual