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Sungrow SG350HX 009

Code: 009
Shown as: Grid Underfrequency
Page: 88
ID: fc:sungrow-sg350hx-9
IRI: https://solarlattice.org/kb/fc/sungrow-sg350hx-9
Status: active
Also known as: 009, 9, Sungrow 009, Grid Underfrequency
Category: Inverters

Class fault verified · fact

Production not stated

Clears not stated

Decoded

Reports grid underfrequency; confirm with inverter settings review; do: grid settings check.

What can be behind Grid underfrequency

Failure modes that present as the reported condition, and the tests that tell them apart.

Defined in

Sungrow SG350HX-US User Manual — Sungrow · page 88 drafted · lead
- tbl=30.r2 h=372720d4ee1d

The manufacturer's own cause and corrective text is not reproduced here.

Same condition on other equipment

ABB / FIMER: ABB / FIMER PVS-166-175-TL W007, ABB / FIMER PVS-60-TL W007, ABB / FIMER UNO-DM-3.3-5.0-PLUS W007, ABB / FIMER UNO-DM-6.0-PLUS W007
Canadian Solar: Canadian Solar 185-255K UN-G-F01/02
Fronius: Fronius Galvo 106, Fronius Primo 106, Fronius Symo 106
Huawei: Huawei SUN2000-100KTL-USH0 2037, Huawei SUN2000-25-30KTL-US 305, Huawei SUN2000-45KTL-US-HV-D0 305
KACO new energy: KACO new energy blueplanet TL3 48
SMA: SMA PEAK3-US 0502, SMA SC-CP-XT 0502, SMA SC-CP-XT 0504, SMA SI-US W323, SMA SI-US W324, SMA SI-US W325, SMA SI-US W326
Schneider Electric: Schneider Electric CL125 009
Solis: Solis 1P-4G-US UN-G-F, Solis 3P-5G-US UN-G-F01/02, Solis RHI-1P-HV UN-G-F01/02, Solis S6-EH1P UN-G-F01/02, Solis S6-EH2P LmtByUnFr, Solis S6-EH2P UN-G-F01, Solis S6-EH2P UN-G-F02, Solis S6-EH3P30-60K LmtByUnFr, Solis S6-EH3P30-60K UN-G-F01, Solis S6-EH3P30-60K UN-G-F02, Solis S6-EH3P75-150K LmtByUnFr, Solis S6-EH3P75-150K UN-G-F01, Solis S6-EH3P75-150K UN-G-F02, Solis S6-GC UN-G-F, Solis S6-GU UN-G-F
Sungrow: Sungrow SG-CX-US 009, Sungrow SG200HX 009, Sungrow SG250HX 9
Yaskawa Solectria: Yaskawa Solectria SGI-XTM Fac Low, Yaskawa Solectria SGI-XTM Fac Very Low, Yaskawa Solectria XGI-1500-1MW WARN-5, Yaskawa Solectria XGI-1500-1MW WARN-6, Yaskawa Solectria XGI-1500-DCG WARN-5, Yaskawa Solectria XGI-1500-DCG WARN-6, Yaskawa Solectria XGI-1500 WARN-5, Yaskawa Solectria XGI-1500 WARN-6

Same code in other families

Claims

`defined_in`

c1 drafted · lead Sungrow SG350HX-US User Manual

Sungrow SG350HX-US User Manual tbl=30.r2 h=372720d4ee1d

`reports`

c2 drafted · lead Grid underfrequency

Sungrow 36 60CX-US IOM tbl=48.r2 h=097b3595b2db
Sungrow SG200HX-US User Manual tbl=30.r2 h=f9e97e4c8044

`has_event_class`

c3 verified · fact Fault (device stops or needs intervention)

Sungrow 36 60CX-US IOM tbl=48.r2 h=097b3595b2db
Sungrow SG200HX-US User Manual tbl=30.r2 h=f9e97e4c8044

verified by: review-workflowverified on: 2026-10-23review note: support check: partial - Row is called a fault and requires contacting Sungrow, but the passages do not classify it explicitly as fault vs…

`detected_by`

c4 drafted · lead Inverter settings review

Sungrow 36 60CX-US IOM tbl=48.r2 h=097b3595b2db
Sungrow SG200HX-US User Manual tbl=30.r2 h=f9e97e4c8044

`mitigated_by`

c5 drafted · lead Grid settings check

Sungrow 36 60CX-US IOM tbl=48.r2 h=097b3595b2db
Sungrow SG200HX-US User Manual tbl=30.r2 h=f9e97e4c8044

`applies_to`

c6 drafted · lead Sungrow SG350HX-US

Sungrow SG350HX-US User Manual tbl=30.r2 h=372720d4ee1d

Data