Error when recording the measuring signal for the insulation test

What does 459 mean?

A fault has occurred specifically in the data acquisition system used to record the measuring signal for the insulation resistance test. This means the inverter cannot accurately perform or verify insulation diagnostics.

• Malfunction of the insulation test measurement circuit
• Sensor failure related to insulation measurement

Click steps to track your progress.

1. 1

   If this status code is displayed all the time, notify a Fronius-trained service engineer.