E46.00 fault in inovance IS580 drive indicates "Pressure sensor is faulty". This means the drive has detected a problem with the pressure sensor input signal.

• Check cables, connectors, and terminals for damage or looseness.
• Ensure shielded cables are grounded properly to avoid noise.
• Confirm that the pressure sensor receives the correct supply voltage (often 24V or specific analog voltage).
• Measure the sensor output signal (usually analog voltage or current).