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

Alarm 2085Built-in PID operation abnormal

Name in the manufacturer's documentation (fault list): Built-in PID operation abnormal[1]

In plain words (editorial)

The built-in PID function is not working properly – the manual names a low DC-to-ground impedance or an unrecoverable internal fault.

When to call a service technician: Have an installer check the DC-to-ground insulation; 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. 77 official manufacturer document quote verified 2085 Built-in PID operation abnormal
  2. [2] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 77 official manufacturer document quote verified the dc-to-ground impedance is low.
  3. [3] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 77 official manufacturer document quote verified an unrecoverable fault has occurred in the internal circuit.
  4. [4] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 77 official manufacturer document quote verified turn off the ac switch and dc switch, wait for the period of time specified on the device safety warning label, and turn on the dc switch and ac switch.
  5. [5] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 77 official manufacturer document quote verified if the fault persists, contact your vendor or technical support.
  6. [6] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 77 official manufacturer document quote verified check the dc-to-ground impedance. if a short circuit or inadequate insulation is found, rectify it.