E40.00 fault in inovance IS580 drive indicates Overcurrent multi prevention fault. This means the drive has detected a current level exceeding its set threshold multiple times or continuously, triggering protective measures to prevent damage.

1. Check motor and mechanical load: Ensure motor shaft can turn freely.
2. Inspect motor windings and cables: Use insulation resistance tester.
3. Verify motor parameters: Check that motor rated current matches the drive settings.
4. Check drive hardware and wiring: Inspect for damaged cables, connectors, or signs of overheating.