Eaton Power Xpert Solar 1500 User Manua

Troubleshooting50 Power Xpert Solar 1500/1670 kW Inverter MN141001EN—October 2014 www.eaton.comDCF2 IDC Over Neg Software Overcurrent detection (negativedirection)Detection of possible miss-wiring in the arraywhere IDC Feedback of any stack exceeds –50 Afor 3 seconds.1. Check inverter re-combiner and DC bus-bar connections2. Check array wiring external to inverterDCF3 IDC Over Pos Software Overcurrent detection (positivedirection)Detection of possible short circuit in the arraywhere IDC Feedback exceeds 1136 A for anystack for 10 msec1. Check inverter re-combiner and DC bus-bar connections2. Check array wiring external to inverterDCF4 Vdc Over Software DC Overvoltage Detection.Detected when the primary DC voltage exceeds1080 Vdc for 60 secondsTypical extreme cold condition: array Voc exceeds 1,000 V wheninverter is in sleep mode.1. Verify ambient temperatures and array or string open-circuitvoltage (Voc)2. Check possible miss-wiring in the array … exceedingdesign-limit of modules/string3. Check HMI Monitors, Main menu; 'DC Voltage4. Check Main VTB4 sensor in DC cabinet sectionDCF5 Vdc Over Fast Fast DC over-voltage protection of 110% ofrated feedback. (Nominal value = 1000 Vdc)Trip level: 1100 Vdc for 1 msecReason dependent upon time of occurrence: sleep mode vs.power-export modeSleep mode: Array (string) Voc exceeds inverter rating: see DCF4Power-export mode: Possible cloud-effect of solar array duringextreme-coldCheck possible miss-wiring in the array … exceeding design-limit ofmodules/string1. Check HMI Monitors, Main menu; 'DC Voltage2. Check Main VTB4 sensor in DC cabinet section3. Check stack VTB1 VTB2 VTB3 sensors in LC CabinetGRF1 Grid A Overcurrent Over-current protection of 115% ratedfeedback. (Nominal value = 2706 A)Trip level: 3112 A >1 msecInverter sourcing too much current into the transformer/grid1. Check transformer taps for proper set-up ratio can indicateincorrect MV-transformer or mains’ transformer taps2. Check inverter current-transformer CTA wiringGRF2 Grid B Overcurrent Over-current protection of 115% ratedfeedback. (Nominal value = 2706 A)Trip level: 3112 A >1 msecInverter sourcing too much current into the transformer/grid1. Check transformer taps for proper set-up ratio can indicateincorrect MV-transformer or mains’ transformer taps2. Check inverter current-transformer CTB wiringGRF3 Grid C Overcurrent Over-current protection of 115% ratedfeedback. (Nominal value = 2706 A)Trip level: 3112 A >1 msecInverter sourcing too much current into the transformer/grid1. Check transformer taps for proper set-up ratio can indicateincorrect MV-transformer or mains’ transformer taps2. Check inverter current-transformer CTC wiringGRF4 Grid A Voltage Over-voltage protection of 125% of rated signal(Nominal value = 320/356 Vac)Trip level: 400/445 Vac >1 msecInverter detecting over-voltage on its output1. Check transformer taps for proper set-up ratio can indicateincorrect MV-transformer or mains’ transformer taps2. Check inverter voltage-sense transformer TR1A wiringGRF5 Grid B Voltage Over-voltage protection of 125% of rated signal(Nominal value = 320/356 V)Trip level: 400/445 Vac >1 msecInverter detecting over-voltage on its output1. Check transformer taps for proper set-up ratio can indicateincorrect MV-transformer or mains’ transformer taps2. Check inverter voltage-sense transformer TR1B wiringGRF6 Grid C Voltage Over-voltage protection of 125% of rated signal(Nominal value = 320/356 Vac)Trip level: 400/445 Vac > 1 msecInverter detecting over-voltage on its output1. Check transformer taps for proper set-up ratio can indicateincorrect MV-transformer or mains’ transformer taps2. Check inverter voltage-sense transformer TR1B wiringTable 13. Warnings That Become Faults: WARNING R FAULT, continuedWarning R F Display Text DescriptionResolutionFollowing these steps. if fault continues, contact Eaton service