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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.

143

Emergency power overload

Fronius · Solar Energy

What does 143 mean?

The emergency power mode has detected an overload and has been interrupted. The inverter will attempt to restart emergency power mode up to three times. If these attempts are unsuccessful, status code 145 will be displayed.

Common Causes

  • Excessive load connected to the emergency power circuit exceeding its capacity
  • Faulty component within the emergency power circuit causing increased current draw

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the emergency power circuit for connected loads and verify they are within rated capacity

  2. 2

    Inspect wiring and components within the emergency power circuit for damage or malfunction

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

Related Faults

1Hardware fault102AC voltage too high103AC voltage too low
Source: Fronius Solar Energy
Open Manual (Page 124)Search more codes in this manual