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ErrorLib — Industrial Fault Code Library

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10254

[Interface]: duplex mode goes to [Full / Half]

SMA · Sunny Boy Solar Inverter

What does 10254 mean?

The network duplex mode of the inverter's interface has changed, specifically dropping to Half duplex. This can lead to significant performance degradation due to collisions and retransmissions, pointing to a physical layer problem.

Common Causes

  • Defective network plug.
  • Defective network cable.
  • Network connector being pulled or plugged, causing a momentary disruption and duplex mode renegotiation.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Ensure that the Ethernet network cable and network connector are not damaged.

  2. 2

    Verify that the network connectors are correctly plugged into their respective ports.

  3. 3

    Ensure the DHCP server (router) and any network switches are signaling correct operation.

Browse all codes in this manual (23)
Verified technical data. Last updated: April 2026

Related Faults

101Grid fault10252[Interface]: communication disrupted10253[Interface]: connection speed goes to [100 Mbit / 10 Mbit]
Source: SMA Sunny Boy Solar Inverter
Open Manual (Page 75)Search more codes in this manual