Huawei · PV inverters · Huawei SUN2000-KTL-M1 (three-phase inverter, 3–10 kW, battery-ready)
Alarm 2010Abnormal DC Input
Name in the manufacturer's documentation (fault list): Abnormal DC Input
[1]
In plain words (editorial)
Abnormal DC input – a DC switch has tripped unexpectedly. The manual warns: if a DC switch is off while the device is running, do not switch it back on directly.
When to call a service technician: Contact your installer or Huawei technical support.
✎ editorial – written from the cited sources, not a manufacturer statement. Status: draft.
For technicians
Possible causes (source text)
- The dc switch has tripped unexpectedly.[2]
Steps given by the manufacturer (source text)
- If any dc switch is off when the device is running, do not turn on the switch directly. (if the device appearance is abnormal, remove the dc terminals after the pv string current decreases to below 0.01 a.) contact your vendor or technical support.[3]
- If the dc switch is off during the first power-on, do not turn it on directly. (if the device appearance is abnormal, remove the dc terminals after the pv string current decreases to below 0.01 a.) check the cable connection as required. if an exception is found, rectify it and then turn on the dc switch as required. if no exception is found, contact your vendor or technical support.[4]
- If any dc switch is on, turn off the ac and dc switches. check the cable connection as required. if an exception is found, rectify it and then turn on the dc switch as required. if no exception is found, contact your vendor or technical support.[5]
⚠ Work on refrigerant circuits, mains electricity and PV DC wiring is for qualified technicians only.
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] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 29 official manufacturer document quote verified
2010 Abnormal DC Input
- [2] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 29 official manufacturer document quote verified
the dc switch has tripped unexpectedly.
- [3] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 29 official manufacturer document quote verified
if any dc switch is off when the device is running, do not turn on the switch directly. (if the device appearance is abnormal, remove the dc terminals after the pv string current decreases to below 0.01 a.) contact your …
- [4] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 29 official manufacturer document quote verified
if the dc switch is off during the first power-on, do not turn it on directly. (if the device appearance is abnormal, remove the dc terminals after the pv string current decreases to below 0.01 a.) check the cable connec…
- [5] Inverter Alarm Reference (Issue 14, 2026-06-15) (EDOC1100345192 Issue 14) , p. 29 official manufacturer document quote verified
if any dc switch is on, turn off the ac and dc switches. check the cable connection as required. if an exception is found, rectify it and then turn on the dc switch as required. if no exception is found, contact your ven…