EL
ErrorLib
Brands
||
  1. Home
  2. Fronius
  3. Symo Advanced Manual
  4. 463
About·Privacy·Terms

ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

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: April 2026

Related Faults

102AC voltage too high103AC voltage too low105AC frequency too high
Source: Fronius Symo Advanced Manual
Open Manual (Page 43)Search more codes in this manual