Fronius Symo Hybrid Inverter Code 459 — Error when recording the measuring signal for the insulation test

What does 459 mean?

The inverter has encountered an error during its insulation test measurement. This error prevents the inverter from feeding energy into the grid.

• Faulty insulation measurement circuit
• Internal data acquisition error during test
• Temporary sensor glitch

Click steps to track your progress.

1. 1

   Perform a full AC and DC power cycle of the inverter: Disconnect both AC and DC power, wait 5 minutes, then reconnect.

2. 2

   Observe the inverter to see if the error clears and energy feeding resumes.

3. 3

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