Phase U to Ground Fault

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A phase-to-ground fault has been detected between the drive and motor on output phase U. This indicates a severe insulation breakdown or short circuit between phase U and earth ground, posing a safety hazard and risk of equipment damage.

• Short circuit detected between Phase U and ground.
• Damaged insulation on Phase U motor winding.
• Faulty Phase U output cable connection to ground.
• Ground fault within the drive's output circuitry for Phase U.

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1. 1

   Check the wiring between the drive output terminal U and the motor for a grounded condition.

2. 2

   Check the motor winding for a grounded condition on phase U.

3. 3

   Replace the drive if wiring and motor are verified good.