c1 drafted · lead CPS 25kW User Manual Rev 2.1
- CPS 25kW User Manual Rev 2.1
tbl=58.r2h=81c46507b9b5
Fault codes › CPS › CPS SCA25KTL-DO-R/US-480
CPS SCA25KTL-480 IsolationErr
Class
not stated
Production
not stated
Clears
not stated
Decoded
Reports low insulation resistance; look at PV array, DC cable; confirm with fault localization; do: DC wiring check, inverter parameter adjustment.
What can be behind Low insulation resistance
Failure modes that present as the reported condition, and the tests that tell them apart.
Defined in
- CPS 25kW User Manual Rev 2.1 — CPS (Chint Power Systems) · page 108 drafted · lead
tbl=58.r2h=81c46507b9b5
The manufacturer's own cause and corrective text is not reproduced here.
Same condition on other equipment
Same code in other families
- CPS SCA25KTL-208 IsolationErr
- CPS SCA36KTL IsolationErr
- CPS SCA50-60KTL IsolationErr
- CPS SCH100-125KTL IsolationErr
- CPS SCH125KTL-AIO IsolationErr
- CPS SCH200-250K-T IsolationErr
- CPS SCH275KTL IsolationErr
- CPS SCH350KTL IsolationErr
Claims
defined_in
reports
c2 drafted · lead Low insulation resistance
- CPS SCH100-125KTL-DO-US-600-480 User Manual Rev 1.9
tbl=36.r8h=acaf4adf7562 - CPS SCA25KTL-DO-US-208 User Manual Rev 1.2
tbl=51.r1h=ef57cb62b84d - CPS 25kW User Manual Rev 2.1
tbl=58.r2h=81c46507b9b5 - CPS SCH125KTL-AIO-US-600 Sep 2020
tbl=32.r2h=064a742016b1 - CPS SCH200-250K-T-US User Manual Aug 2026
tbl=42.r7h=bcf81b9b362d - CPS SCH275KTL-DO-US-800 V2 User Manual Rev 1.7
tbl=27.r14h=6097f6c3cfa2 - CPS SCH350KTL-DO-US-800 User Manual Rev 2.2
tbl=35.r3h=91fe203f5279
affects
- CPS SCH100-125KTL-DO-US-600-480 User Manual Rev 1.9
tbl=36.r8h=acaf4adf7562 - CPS SCA25KTL-DO-US-208 User Manual Rev 1.2
tbl=51.r1h=ef57cb62b84d - CPS 25kW User Manual Rev 2.1
tbl=58.r2h=81c46507b9b5 - CPS SCH125KTL-AIO-US-600 Sep 2020
tbl=32.r2h=064a742016b1 - CPS SCH200-250K-T-US User Manual Aug 2026
tbl=42.r7h=bcf81b9b362d - CPS SCH275KTL-DO-US-800 V2 User Manual Rev 1.7
tbl=27.r18h=2086e621c3f7 - CPS SCH275KTL-DO-US-800 V2 User Manual Rev 1.7
tbl=27.r19h=2dd4d412445e
- CPS SCH275KTL-DO-US-800 V2 User Manual Rev 1.7
tbl=27.r19h=2dd4d412445e - CPS SCA25KTL-DO-US-208 User Manual Rev 1.2
tbl=51.r1h=ef57cb62b84d - CPS 25kW User Manual Rev 2.1
tbl=58.r2h=81c46507b9b5 - CPS SCH125KTL-AIO-US-600 Sep 2020
tbl=32.r2h=064a742016b1 - CPS SCH200-250K-T-US User Manual Aug 2026
tbl=42.r7h=bcf81b9b362d
review note: support check: partial - Passages say to trace the wiring of the faulted string for leakage, but a DC cable is not named explicitly.
detected_by
c5 drafted · lead Fault localization
- CPS SCH100-125KTL-DO-US-600-480 User Manual Rev 1.9
tbl=36.r8h=acaf4adf7562 - CPS SCH275KTL-DO-US-800 V2 User Manual Rev 1.7
tbl=27.r15h=7449fd187fa6 - CPS SCH275KTL-DO-US-800 V2 User Manual Rev 1.7
tbl=27.r16h=1ac7d007f121 - CPS SCH275KTL-DO-US-800 V2 User Manual Rev 1.7
tbl=27.r17h=0049cd36947f - CPS SCH275KTL-DO-US-800 V2 User Manual Rev 1.7
tbl=27.r18h=2086e621c3f7 - CPS 25kW User Manual Rev 2.1
tbl=58.r2h=81c46507b9b5 - CPS SCH125KTL-AIO-US-600 Sep 2020
tbl=32.r2h=064a742016b1 - CPS SCH200-250K-T-US User Manual Aug 2026
tbl=42.r7h=bcf81b9b362d
mitigated_by
c6 drafted · lead DC wiring check
- CPS SCA25KTL-DO-US-208 User Manual Rev 1.2
tbl=51.r1h=ef57cb62b84d - CPS 25kW User Manual Rev 2.1
tbl=58.r2h=81c46507b9b5 - CPS SCH125KTL-AIO-US-600 Sep 2020
tbl=32.r2h=064a742016b1 - CPS SCH200-250K-T-US User Manual Aug 2026
tbl=42.r7h=bcf81b9b362d - CPS SCH275KTL-DO-US-800 V2 User Manual Rev 1.7
tbl=27.r19h=2dd4d412445e - CPS SCH350KTL-DO-US-800 User Manual Rev 2.2
tbl=35.r3h=91fe203f5279
c7 drafted · lead Inverter parameter adjustment
Insulation resistance threshold parameter may be adjusted as a last step.
- CPS SCA25KTL-DO-US-208 User Manual Rev 1.2
tbl=51.r1h=ef57cb62b84d - CPS 25kW User Manual Rev 2.1
tbl=58.r2h=81c46507b9b5 - CPS SCH125KTL-AIO-US-600 Sep 2020
tbl=32.r2h=064a742016b1
review note: support check: partial - The ISOResist parameter can be adjusted, but 'last step' ordering and 'threshold' are only implied by its position as item 6.
applies_to
c8 drafted · lead CPS SCA25KTL-DO-R/US-480
- CPS 25kW User Manual Rev 2.1
tbl=58.r2h=81c46507b9b5