E45.00 fault in inovance IS580 drive indicates Motor PTC overheat. This means the resistance of the PTC exceeds a set threshold.

• Power off and allow the motor to cool for 15–30 minutes.
• Make sure PTC wires are connected to the correct terminals on the drive (typically a dedicated analog/PTC input).
• Ensure fans are running and air passages are clear.
• Check ambient temperature is within rated range.