Fault codes › SMA › Sunny Boy 3.0-7.7-US (SBx.x-1SP/1TP-US-40)

SMA SB-US-40 701

Code: 701
Shown as: Frq. not permitted > Check parameter
Page: 48
ID: fc:sma-sb-us-40-701
IRI: https://solarlattice.org/kb/fc/sma-sb-us-40-701
Status: active
Also known as: 701, SMA 701, Frq. not permitted > Check parameter
Category: Inverters

Class fault drafted · lead

Production stops drafted · lead

Clears not stated

Decoded

Reports grid frequency out of range; confirm with grid frequency measurement; do: AC connection check, utility company consultation, inverter parameter adjustment.

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

SBxx-US-1XP-40-BA-en-13 — SMA · page 48 drafted · lead
- sec=h187 h=1b7a4d540c92
- sec=h188 h=7931737921cb

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-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-GC G-F-FLU, 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 SBxx-US-1XP-40-BA-en-13

SBxx-US-1XP-40-BA-en-13 sec=h187 h=1b7a4d540c92
SBxx-US-1XP-40-BA-en-13 sec=h188 h=7931737921cb

`reports`

c2 drafted · lead Grid frequency out of range

SBxx-US-1XP-40-BA-en-13 sec=h188 h=7931737921cb
SBxx-US-1XP-41-BA-en-12 sec=h241 h=272c39d1e1c3
STPTL-US-10-IA-xx-22 tbl=14.r2 h=8700c90cd6e3

`has_event_class`

c3 drafted · lead Fault (device stops or needs intervention)

SBxx-US-1XP-40-BA-en-13 sec=h188 h=7931737921cb
SBxx-US-1XP-41-BA-en-12 sec=h241 h=272c39d1e1c3

`has_production_effect`

c4 drafted · lead Trip (production stops)

SBxx-US-1XP-40-BA-en-13 sec=h188 h=7931737921cb
SBxx-US-1XP-41-BA-en-12 sec=h241 h=272c39d1e1c3
SBSExx-US-50-BE-en-11 sec=h494 h=272c39d1e1c3
STPxx-US-50-BE-en-14 sec=h428 h=272c39d1e1c3
SHPxxx-US-21-BE-en-11 sec=h305 h=272c39d1e1c3

`detected_by`

c5 drafted · lead Grid frequency measurement

SBxx-US-1XP-40-BA-en-13 sec=h189 h=b7762bd72e17
SBxx-US-1XP-41-BA-en-12 sec=h242 h=c704af31bf5e

review note: support check: partial - Corrective measures involve checking grid frequency, but detection by frequency measurement is only implied.

`mitigated_by`

c6 verified · fact AC connection check

SBxx-US-1XP-41-BA-en-12 sec=h242 h=c704af31bf5e
SBSExx-US-50-BE-en-11 sec=h495 h=c704af31bf5e
STPxx-US-50-BE-en-14 sec=h429 h=c704af31bf5e
SHPxxx-US-21-BE-en-11 sec=h306 h=c704af31bf5e

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

c7 drafted · lead Utility company consultation

When frequency fluctuations and this message occur often.

SBxx-US-1XP-40-BA-en-13 sec=h189 h=b7762bd72e17
SBxx-US-1XP-41-BA-en-12 sec=h242 h=c704af31bf5e

c8 drafted · lead Inverter parameter adjustment

Only with grid operator approval, coordinated with manufacturer service.

SBxx-US-1XP-40-BA-en-13 sec=h189 h=b7762bd72e17
SBxx-US-1XP-41-BA-en-12 sec=h242 h=c704af31bf5e

`applies_to`

c9 drafted · lead Sunny Boy 3.0-7.7-US-40 proposed

SBxx-US-1XP-40-BA-en-13 sec=h187 h=1b7a4d540c92
SBxx-US-1XP-40-BA-en-13 sec=h188 h=7931737921cb

SMA SB-US-40 701

Decoded

What can be behind Grid frequency out of range

Defined in

Same condition on other equipment

Same code in other families

Claims

defined_in

reports

has_event_class

has_production_effect

detected_by

mitigated_by

applies_to

Data