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10018 Internal Fault IDSP UNDER FREQ Inverter Underfrequency System Severity Level 4 In the Grid Connect mode, the AC underfrequency indicates that the grid is operating under some fault condition or that a local island has formed. In the Stand-alone mode, the AC underfrequency may damage the customer load. In either case, it is important that the inverter be shut down. The software declares an AC underfrequency fault when the estimate of AC frequency falls below AC Minimum Frequency Limit, for a period of time greater than the AC Underfrequency Time-out. Symptom Probable Cause Analysis Repair Solution The estimated AC frequency exceeds AC Min Frequency Limit for a period of time greater than the AC Under- Fre- quency Time-out setting. The AC Min Fre- quency Limit is wrongly set. Make sure that the power board PM is programmed properly, and it is supported by the control software being used. Re-program the power board PM. The AC Under- Fre- quency Timeout is wrongly set. Make sure that the power board PM is programmed properly, and it is supported by the control software being used. Re-program the power board PM. The grid is in fault condition Check the quality of the grid and make sure that no local island has formed. Clear the fault condition of the grid. Faulty DPC Con- trol Board DPC Control Board needs replacing. Replace DPC Con- trol Board Faulty DPC Power Board DPC Power Board needs replacing. Replace DPC Power Board Observe Safety Precautions - Refer to Important Safety Instructions for Details Troubleshooting Guide 164 511521-002 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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