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

Alarm 4011App Communication Certificate Invalid

Name in the manufacturer's documentation (fault list): App Communication Certificate Invalid[1]

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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. 116 official manufacturer document quote verified 4011 App Communication Certificate Invalid
  2. [2] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 115 official manufacturer document quote verified the device time is incorrectly set.
  3. [3] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 114 official manufacturer document quote verified the certificate file is abnormal or incorrect.
  4. [4] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 115 official manufacturer document quote verified check whether the device time is incorrectly set. if yes, reset or synchronize the system time.
  5. [5] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 115 official manufacturer document quote verified contact your vendor or technical support to apply for a new certificate file and load it.