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Huawei · PV inverters · Huawei SUN2000-KTL-M1 (three-phase inverter, 3–10 kW, battery-ready)

Alarm 2103AC Terminal Temperature Abnormal

Name in the manufacturer's documentation (fault list): AC Terminal Temperature Abnormal[1]

In plain words (editorial)

The AC terminal temperature is abnormal; the inverter shuts down. The manual names an AC cable that is not of the recommended specification or is oxidised, terminals not crimped as required, or a wrong fastening torque.

When to call a service technician: Have an electrician check the AC cable and terminals.

✎ editorial – written from the cited sources, not a manufacturer statement. Status: draft.

The Polish page has more detail (plain-language explanation, safe checks, guides): Read in Polish →

Sources

Every statement has a footnote to the document and PDF page. “Quote verified” means the quote was found automatically in the text of that page.

  1. [1] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 97 official manufacturer document quote verified 2103 AC Terminal Temperature Abnormal
  2. [2] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 97 official manufacturer document quote verified the ac power cable is not of the recommended specifications or is oxidized.
  3. [3] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 97 official manufacturer document quote verified the ot/od terminal of the ac power cable is not crimped as required.
  4. [4] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 97 official manufacturer document quote verified the fastening torque of the ac terminal does not meet the requirement.
  5. [5] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 97 official manufacturer document quote verified check whether the cables meet the requirements.
  6. [6] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 97 official manufacturer document quote verified check whether the ot/od terminals are crimped as required.
  7. [7] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 96 official manufacturer document quote verified the device is shut down.