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Fault codes › Solis › Solis S6-GC(25-60)K-US

Solis S6-GC G-F-FLU

Code
G-F-FLU
Shown as
Grid frequency fluctuat ion
Page
73
ID
fc:solis-s6-gc-us-gfflu
IRI
https://solarlattice.org/kb/fc/solis-s6-gc-us-gfflu
Status
active
Also known as
G-F-FLU, gfflu, Solis G-F-FLU, Grid frequency fluctuat ion
Category
Inverters
Class not stated
Production not stated
Clears after a manual reset drafted · lead

Decoded

Reports grid frequency out of range; confirm with grid frequency measurement; do: inverter restart.

What can be behind Grid frequency out of range

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

Defined in

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

Same condition on other equipment

CPS
CPS SCA25KTL-208 GridF.OutLim, CPS SCA25KTL-480 GridF.OutLim, CPS SCA36KTL GridF.OutLim, CPS SCA50-60KTL GridF.OutLim, CPS SCH100-125KTL GridF.OutLim, CPS SCH125KTL-AIO GridF.OutLim, CPS SCH200-250K-T GridF.OutLim, CPS SCH275KTL GridF.OutLim, CPS SCH350KTL GridF.OutLim
Canadian Solar
Canadian Solar 23-28KTL-CT GridF.OutLim
Fronius
Fronius Galvo 454, Fronius Primo 454, Fronius Symo 454
Huawei
Huawei SUN2000-25-30KTL-US 305, Huawei SUN2000-45KTL-US-HV-D0 305
SMA
SMA SB-US-40 501, SMA SB-US-40 701, SMA SB-US-41 0205, SMA SB-US-41 501, SMA SB-US-41 701, SMA SBSE-US-50 501, SMA SBSE-US-50 701, SMA PEAK3-US 501, SMA PEAK3-US 701, SMA CORE1-US 501, SMA STP-TL-US 501, SMA STP-TL-US 701, SMA STP-X-US 501, SMA STP-X-US 701, SMA SC-CP-XT 0205
Schneider Electric
Schneider Electric CL125 054
Solis
Solis S6-EH2P LmtByFreq, Solis S6-EH3P30-60K LmtByFreq, Solis S6-EH3P75-150K LmtByFreq, Solis S6-GU G-F-FLU
Sungrow
Sungrow SG-CX-US 013, Sungrow SG200HX 013, Sungrow SG250HX 13, Sungrow SG350HX 013
Yaskawa Solectria
Yaskawa Solectria PVI-14-20TL GridF.OutLim, Yaskawa Solectria PVI-25TL-R GridF.OutLim, Yaskawa Solectria PVI-TL GridF.OutLim

Same code in other families

Claims

defined_in

c1 drafted · lead Solis S6-GC30K-LV-US Manual V1.2

reports

c2 verified · fact Grid frequency out of range

verified by: review-workflowverified on: 2026-10-23

detected_by

c3 drafted · lead Grid frequency measurement

review note: support check: partial - Monitoring grid frequency variations is suggested, but a detection method is not explicitly stated.

mitigated_by

c4 drafted · lead Inverter restart

has_recovery

c5 drafted · lead Manual reset (operator restarts or acknowledges)

Restart first; then monitor grid frequency variations.

review note: support check: partial - Restart then monitor frequency is listed, but clearing by manual reset is not stated.

applies_to

c6 drafted · lead Solis S6-GC(25-60)K-US

Data