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

SMA SB-US-40 1302

Code: 1302
Page: 48
ID: fc:sma-sb-us-40-1302
IRI: https://solarlattice.org/kb/fc/sma-sb-us-40-1302
Status: active
Also known as: 1302, SMA 1302
Category: Inverters

Class fault drafted · lead

Production stops drafted · lead

Clears not stated

Decoded

Reports grid loss, phase loss; look at AC cable; confirm with grid voltage measurement; do: AC connection check, grid settings check, grounding conductor check.

What can be behind Grid loss

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

What can be behind Phase loss

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=h193 h=ee47968ec53b

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

Same condition on other equipment

Canadian Solar: Canadian Solar 125K-T600GL02 NO-GRID, Canadian Solar 125KTL-GS-E NO-GRID, Canadian Solar 185-255K NO-GRID, Canadian Solar 23-28KTL-CT GridF.OutLim, Canadian Solar 25-40K-T480GL01 NO-GRID, Canadian Solar 25-40KTL-GS-FL NO-GRID, Canadian Solar 50-66K-T480GL01 NO-GRID, Canadian Solar 50-66KTL-GS-FL NO-GRID, Canadian Solar 75-100K-T480GL02 NO-GRID
Fronius: Fronius Galvo 107, Fronius Primo 107, Fronius Symo 107
Huawei: Huawei SUN2000-100KTL-USH0 2032, Huawei SUN2000-25-30KTL-US 301, Huawei SUN2000-45KTL-US-HV-D0 301
KACO new energy: KACO new energy blueplanet TL3 73
SMA: SMA SB-US-40 202-206, SMA SB-US-41 1302, SMA SB-US-41 202, SMA SB-US-41 0203, SMA SB-US-41 206, SMA SBSE-US-50 1302, SMA SBSE-US-50 202, SMA SBSE-US-50 0203, SMA SBSE-US-50 206, SMA PEAK3-US 1302, SMA CORE1-US 801, SMA STP-TL-US 1302, SMA STP-TL-US 202-203, SMA STP-X-US 1302, SMA SC-CP-XT 0203, SMA SC-CP-XT 801, SMA SC-CP-XT 0802, SMA SI-US F314, SMA SI-US F818
Solis: Solis 1P-4G-US NO-GRID, Solis 3P-5G-US NO-GRID, Solis RHI-1P-HV NO-GRID, Solis S5-GC NO-GRID, Solis S6-EH1P NO-GRID, Solis S6-EH2P NO-GRID, Solis S6-EH3P30-60K NO-GRID, Solis S6-EH3P75-150K NO-GRID, Solis S6-GC NO-GRID, Solis S6-GU NO-GRID
Sungrow: Sungrow SG-CX-US 010, Sungrow SG200HX 010, Sungrow SG250HX 10, Sungrow SG350HX 010
Yaskawa Solectria: Yaskawa Solectria SGI-XTM AC Islanding, Yaskawa Solectria SGI-XTM Open Phase, Yaskawa Solectria SGI-XTM Wait for Grid, Yaskawa Solectria XGI-1500-1MW WARN-4, Yaskawa Solectria XGI-1500-DCG WARN-4, Yaskawa Solectria XGI-1500 WARN-4

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=h193 h=ee47968ec53b

`reports`

c2 drafted · lead Grid loss

SBxx-US-1XP-41-BA-en-12 sec=h249 h=386bbb27f481
SBSExx-US-50-BE-en-11 sec=h514 h=386bbb27f481

c3 verified · fact Phase loss

SBxx-US-1XP-40-BA-en-13 sec=h194 h=3f7cf298cc7a
STPxx-US-50-BE-en-14 sec=h443 h=e314a6e53a42
SHPxxx-US-21-BE-en-11 sec=h310 h=1e5c00decc77

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

`affects`

c4 drafted · lead AC cable

SBxx-US-1XP-40-BA-en-13 sec=h195 h=31f1a10ae8da
SBxx-US-1XP-41-BA-en-12 sec=h250 h=f9a04e763a75
SBSExx-US-50-BE-en-11 sec=h515 h=f9a04e763a75
SHPxxx-US-21-BE-en-11 sec=h311 h=12ba84b8cd7e

`detected_by`

c5 drafted · lead Grid voltage measurement

STPxx-US-50-BE-en-14 sec=h444 h=f910b6ee313a

review note: support check: partial - The passages say the grid monitor detects the unconnected conductors and list AC voltage measurements as corrective steps; they don't…

`mitigated_by`

c6 drafted · lead AC connection check

SBxx-US-1XP-40-BA-en-13 sec=h195 h=31f1a10ae8da
STPTL-US-10-IA-xx-22 tbl=14.r4 h=683394f59a4a
SBxx-US-1XP-41-BA-en-12 sec=h250 h=f9a04e763a75
SBSExx-US-50-BE-en-11 sec=h515 h=f9a04e763a75
STPxx-US-50-BE-en-14 sec=h444 h=f910b6ee313a
SHPxxx-US-21-BE-en-11 sec=h311 h=12ba84b8cd7e

c7 drafted · lead Grid settings check

STPxx-US-50-BE-en-14 sec=h444 h=f910b6ee313a

c8 drafted · lead Grounding conductor check

STPxx-US-50-BE-en-14 sec=h444 h=f910b6ee313a

`has_event_class`

c9 drafted · lead Fault (device stops or needs intervention)

STPTL-US-10-IA-xx-22 tbl=14.r4 h=683394f59a4a
STPxx-US-50-BE-en-14 sec=h443 h=e314a6e53a42

`has_production_effect`

c10 drafted · lead Trip (production stops)

STPTL-US-10-IA-xx-22 tbl=14.r4 h=683394f59a4a
STPxx-US-50-BE-en-14 sec=h443 h=e314a6e53a42

`applies_to`

c11 drafted · lead Sunny Boy 3.0-7.7-US-40 proposed

SBxx-US-1XP-40-BA-en-13 sec=h193 h=ee47968ec53b

SMA SB-US-40 1302

Decoded

What can be behind Grid loss

What can be behind Phase loss

Defined in

Same condition on other equipment

Same code in other families

Claims

defined_in

reports

affects

detected_by

mitigated_by

has_event_class

has_production_effect

applies_to

Data