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10019 Internal Fault IDSP DLTA FREQ Inverter Rate of Change of Frequency System Severity Level 4 This fault is only tested in Grid Connect modes, where an excessive rate of change of frequency indicates that a local island has formed. This detection mechanism is the primary way of detecting islanding when the island is supported by synchronous rotating generators in addition to Capstone systems. The software declares this fault when the estimate of rate of change of frequency exceeds the Frequency Filter Crossover, for a period of time greater than the AC Underfrequency Time-out. Symptom Probable Cause Analysis Repair Solution The estimate of rate of change of fre- quency exceeds the Frequency Filter Crossover for a period of time greater than the AC Under Frequency Timeout. The AC Frequency Fil- ter Crossover is wrongly set. Make sure that the power board PM is programmed properly, and it is supported by the control soft- ware being used. Re-program the power board PM. The Rate Of Change Of Frequency (ROCOF) Fault Timeout Period is wrongly set. Make sure that the power board PM is programmed properly, and it is supported by the control soft- ware being used. Re-program the power board PM. The grid is in fault condition. Especially, a local island has formed Check the quality of the grid and make sure that no local island has formed. Clear the fault condition of the grid. Faulty DPC Control Board DPC Control Board needs replac- ing. Replace DPC Control Board Faulty DPC Power Board DPC Power Board needs replacing. Replace DPC Power Board Observe Safety Precautions - Refer to Important Safety Instructions for Details 511521-002 165 Troubleshooting Guide This information is confidential and proprietary to Capstone. Neither this document nor the information contained herein shall be copied, disclosed to others, or used for any purposes other than the specific purpose for which this document was delivered.PDF Image | Overview SERIES 10000 FAULT CODES Inverter Faults
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