c1 drafted · lead CPS SCH350KTL-DO-US-800 User Manual Rev 2.2
- CPS SCH350KTL-DO-US-800 User Manual Rev 2.2
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Fault codes › CPS › CPS SCH350KTL-DO/US-800
CPS SCH350KTL CfLowErr
Production
not stated
Decoded
Reports flying capacitor undervoltage; confirm with inverter display check; do: string isolation, inverter restart, contact manufacturer service.
What can be behind Flying capacitor undervoltage
Failure modes that present as the reported condition, and the tests that tell them apart.
Defined in
- CPS SCH350KTL-DO-US-800 User Manual Rev 2.2 — CPS (Chint Power Systems) · page 94 drafted · lead
tbl=33.r1h=1cf0c0d20e6c
The manufacturer's own cause and corrective text is not reproduced here.
Claims
defined_in
reports
c2 drafted · lead Flying capacitor undervoltage
- CPS SCH350KTL-DO-US-800 User Manual Rev 2.2
tbl=33.r1h=1cf0c0d20e6c
has_event_class
c3 verified · fact Warning (device continues, a condition is flagged)
- CPS SCH350KTL-DO-US-800 User Manual Rev 2.2
tbl=33.r1h=1cf0c0d20e6c - CPS SCH350KTL-DO-US-800 User Manual Rev 2.2
sec=h143h=1a6d43333022
verified by: review-workflowverified on: 2026-10-23review note: support check: partial - Only a table title 'Warning Faults' is cited, with no row showing CfLowErr in it; classification not clearly tied to…
detected_by
c4 drafted · lead Inverter display check
- CPS SCH350KTL-DO-US-800 User Manual Rev 2.2
tbl=33.r1h=1cf0c0d20e6c
mitigated_by
c5 drafted · lead String isolation
- CPS SCH350KTL-DO-US-800 User Manual Rev 2.2
tbl=33.r1h=1cf0c0d20e6c
c6 drafted · lead Inverter restart
- CPS SCH350KTL-DO-US-800 User Manual Rev 2.2
tbl=33.r1h=1cf0c0d20e6c
c7 drafted · lead Contact manufacturer service
- CPS SCH350KTL-DO-US-800 User Manual Rev 2.2
tbl=33.r1h=1cf0c0d20e6c
has_recovery
c8 drafted · lead Manual reset (operator restarts or acknowledges)
Remove the lowest-voltage branch and restart; contact service if the condition remains
- CPS SCH350KTL-DO-US-800 User Manual Rev 2.2
tbl=33.r1h=1cf0c0d20e6c
review note: support check: partial - Restart is an operator action, but the passage doesn't explicitly say how it clears; manual reset is implied only.
applies_to
c9 drafted · lead CPS SCH350KTL-DO/US-800
- CPS SCH350KTL-DO-US-800 User Manual Rev 2.2
tbl=33.r1h=1cf0c0d20e6c