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

Alarm 2104DC Terminal Temperature Abnormal

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

In plain words (editorial)

The DC terminal temperature is abnormal; the inverter shuts down. The manual names DC cables not of the recommended specification or oxidised, a DC connector not fully inserted, badly crimped terminals or wrong tightening torque.

When to call a service technician: Have an installer check the DC cables and connectors; if the fault persists, contact Huawei technical support.

✎ 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. 99 official manufacturer document quote verified 2104 DC Terminal Temperature Abnormal
  2. [2] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 99 official manufacturer document quote verified the dc 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. 99 official manufacturer document quote verified the dc connector is not properly inserted.
  4. [4] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 99 official manufacturer document quote verified the ot/od terminals of the dc cable are not crimped as required, or the tightening torque of the wiring terminals on the dc side does not meet the requirement.
  5. [5] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 99 official manufacturer document quote verified the temperature of the dc terminal on mppt1 is abnormal.
  6. [6] 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.
  7. [7] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 100 official manufacturer document quote verified check whether the dc connector is properly inserted.
  8. [8] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 100 official manufacturer document quote verified check whether the ot/od terminals are crimped as required and whether the tightening torque of wiring terminals meets the requirement.
  9. [9] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 100 official manufacturer document quote verified turn on the ac switch and dc switch, and restart the inverter.
  10. [10] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 100 official manufacturer document quote verified check whether the pv terminal cores are crimped properly.
  11. [11] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 100 official manufacturer document quote verified check whether the pv terminal models are correct.
  12. [12] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 100 official manufacturer document quote verified check whether pv terminals are loosely connected.
  13. [13] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 100 official manufacturer document quote verified if the preceding items are normal, turn on the ac switch and dc switch, and restart the device. if the fault persists, contact the vendor or technical support.
  14. [14] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 99 official manufacturer document quote verified the device is shut down.