463

Reversed AC polarity, AC connector inserted incorrectly

Fronius · Symo Advanced Manual

What does 463 mean?

The AC power cable has been connected with reversed polarity, or the AC connector is inserted incorrectly. This is a wiring error that can prevent the inverter from operating safely and correctly.

Common Causes

  • Incorrect wiring of live and neutral or phase conductors at the AC connection point
  • Improper insertion of the AC connector

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

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

Browse all codes in this manual (60)
Verified technical data. Last updated: March 2026

Related Faults

Source: Fronius Symo Advanced Manual