Neutral conductor not connected

What does 448 mean?

This code indicates that the neutral conductor is not correctly connected. For certain grid configurations, a missing neutral connection is critical for proper operation and safety, preventing the inverter from feeding energy into the grid.

• Loose or disconnected neutral wire in the AC grid connection.
• Incorrect wiring during inverter installation.
• Faulty neutral connection point within the inverter or switchgear.

Click steps to track your progress.

1. 1

   If the status code is displayed continuously, notify a Fronius-trained service engineer for wiring inspection.

2. 2

   Verify the integrity and connection of the neutral conductor at the inverter's AC terminals and grid connection point.

3. 3

   Measure the AC voltage between phases and neutral to confirm proper connection.