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

Alarm 2062Low Insulation Resistance

Name in the manufacturer's documentation (fault list): Low Insulation Resistance[1]

In plain words (editorial)

Low insulation resistance: the manual names a short circuit between the PV array and ground, or damp air around the PV array causing poor insulation. The inverter cannot start.

When to call a service technician: Have an installer check the PV array insulation and the PE cable. Contact your installer or 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. 52 official manufacturer document quote verified 2062 Low Insulation Major
  2. [2] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 52 official manufacturer document quote verified A short circuit has occurred between the PV array and the
  3. [3] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 52 official manufacturer document quote verified The ambient air of the PV array is damp and the insulation
  4. [4] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 52 official manufacturer document quote verified The battery rack is short-circuited to the ground.
  5. [5] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 53 official manufacturer document quote verified Set Insulation resistance protection to the minimum value and
  6. [6] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 53 official manufacturer document quote verified Check that the PE cable of the device is correctly connected.
  7. [7] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 53 official manufacturer document quote verified Check the output-to-ground impedance of the PV array.
  8. [8] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 52 official manufacturer document quote verified The device cannot be started.