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Fault codes › Huawei › Huawei SUN2000-100KTL-USH0

Huawei SUN2000-100KTL-USH0 2051

Code
2051
Shown as
Abnormal Residual Current
Vendor severity
Major
Page
122
ID
fc:huawei-sun2000-100ktl-ush0-2051
IRI
https://solarlattice.org/kb/fc/huawei-sun2000-100ktl-ush0-2051
Status
active
Also known as
2051, Huawei 2051, Abnormal Residual Current
Category
Inverters
Class fault drafted · lead
Production stops drafted · lead
Clears by itself verified · fact

Decoded

Reports high leakage current; look at PV array; confirm with insulation resistance testing.

What can be behind High leakage current

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

ABB / FIMER
ABB / FIMER PVS-166-175-TL E018, ABB / FIMER PVS-60-TL E018, ABB / FIMER TRIO-20.0-27.6-TL E018, ABB / FIMER UNO-DM-3.3-5.0-PLUS E018, ABB / FIMER UNO-DM-6.0-PLUS E018
CPS
CPS SCA25KTL-208 Fault0090, CPS SCA25KTL-208 GFCIErr, CPS SCA25KTL-480 Fault0090, CPS SCA25KTL-480 GFCIErr, CPS SCA50-100K-T Protect0650, CPS SCH100-125KTL Fault0090, CPS SCH100-125KTL GFCIErr, CPS SCH125KTL-AIO Fault0090, CPS SCH125KTL-AIO GFCIErr, CPS SCH200-250K-T Fault0650, CPS SCH200-250K-T GFCIErr, CPS SCH275KTL Fault0090, CPS SCH275KTL GFCIErr, CPS SCH350KTL Fault0090, CPS SCH350KTL GFCIErr
Canadian Solar
Canadian Solar 185-255K ILeak-PRO 01/02/03/04, Canadian Solar 23-28KTL-CT GFCIErr
Huawei
Huawei SUN2000-25-30KTL-US 318, Huawei SUN2000-45KTL-US-HV-D0 318
KACO new energy
KACO new energy blueplanet TL3 18, KACO new energy blueplanet TL3 78
SMA
SMA SB-US-40 3601, SMA SB-US-41 3601, SMA SBSE-US-50 3601, SMA PEAK3-US 3601, SMA STP-TL-US 3601, SMA STP-X-US 3601, SMA SC-CP-XT 3601
Schneider Electric
Schneider Electric CL125 012, Schneider Electric CL125 056
Solis
Solis 3P-5G-US ILeak-PRO 01/02/03/04, Solis RHI-1P-HV ILeak-PRO 01/02/03/04, Solis S6-EH1P ILeak-PRO 01/02/03/04, Solis S6-EH2P ILeak-PRO01, Solis S6-EH2P ILeak-PRO02, Solis S6-EH2P ILeak-PRO03, Solis S6-EH2P ILeak-PRO04, Solis S6-EH3P30-60K ILeak-PRO01, Solis S6-EH3P30-60K ILeak-PRO02, Solis S6-EH3P30-60K ILeak-PRO03, Solis S6-EH3P30-60K ILeak-PRO04, Solis S6-EH3P75-150K ILeak-PRO01, Solis S6-EH3P75-150K ILeak-PRO02, Solis S6-EH3P75-150K ILeak-PRO03, Solis S6-EH3P75-150K ILeak-PRO04, Solis S6-GC ILeak-PRO, Solis S6-GU ILeak-PRO
Sungrow
Sungrow SG-CX-US 012, Sungrow SG200HX 012, Sungrow SG250HX 12, Sungrow SG350HX 012
Yaskawa Solectria
Yaskawa Solectria PVI-14-20TL GFCI.Err, Yaskawa Solectria PVI-25TL-R Fault0090, Yaskawa Solectria PVI-25TL-R GFCI.Err, Yaskawa Solectria PVI-TL GFCI.Err, Yaskawa Solectria SGI-XTM RCM Warn

Claims

defined_in

c1 drafted · lead Huawei SUN2000-100KTL-USH0 User Manual

has_event_class

c2 drafted · lead Fault (device stops or needs intervention)

from the Type column

reports

c3 drafted · lead High leakage current

affects

c4 drafted · lead PV array

detected_by

c5 verified · fact Insulation resistance testing

When alarm is frequent or persistent, check string-to-ground impedance.

verified by: review-workflowverified on: 2026-10-23review note: support check: partial - Evidence says to check PV string to ground impedance when frequent or persistent, but does not name an insulation resistance…

has_production_effect

c6 drafted · lead Trip (production stops)

has_recovery

c7 verified · fact Auto-reset (clears by itself)

Occasional alarms clear automatically; persistent ones need impedance check.

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

applies_to

c8 drafted · lead Huawei SUN2000-100KTL-USH0

Data