Troubleshooting46 Power Xpert Solar 1500/1670 kW Inverter MN141001EN—October 2014 www.eaton.comFigure 28. Power Xpert Solar Machine-State Transition DiagramTable 11. Critical Faults: CRITICAL FAULTSCriticalFaults Display Text DescriptionResolutionFollowing these steps. if fault continues, contact Eaton serviceCF1 CB1 Fault Circuit Breaker 1 hardware feedback fault(Wiring Error Detection)1. Check CB1 wiring2. Ensure that CB1 is poweredCF2 Disconnect 1 Fault DC DS1 Disconnect hardware feedback fault(Wiring Error Detection)Check DC Disconnect DS1 wiringCF3 Disconnect 2 Fault DC DS2 Disconnect hardware feedback fault(Wiring Error Detection)Check DC Disconnect DS2 wiringCF4 Disconnect 3 Fault DC DS3 Disconnect hardware feedback fault(Wiring Error Detection)Check DC Disconnect DS3 wiringDCF7 Disconnect Open Occurs when a DC Disconnect is manuallyopened during operation.1. Do not open DC disconnects (DS1 DS2 DS3) while running2. Check DC disconnect shunt-trip wiring.ESTOP E-Stop Input Local E-Stop pushbutton asserted 1. Pull OUT the E-Stop buttonButton pulled OUT is the “normal” non-fault position2. Reset fault via HMI3. Check E-Stop wiring on the control section cabinet doorThe three circuit contacts are of the N.C. (fail-safe) typeFUF1 Fuse Fault 1 Filter Capacitor Fuse FaultIndicates one of the filter-capacitor fusesfailed in Stack 1.Check the 400 A LC filter fuses in Stack 1 (continuity check)■ F13 –FSW1 | F14 –FSW2 | F15 –FSW3■ Circuits from CAUX2-J3-8 to TB11-7FUF2 Fuse Fault 2 Filter Capacitor Fuse FaultIndicates one of the filter-capacitor fusesfailed in Stack 2.Check the 400 A LC filter fuses in Stack 2 (continuity check)■ F16 –FSW4 | F17 –FSW5 | F18 –FSW6■ Circuits from CAUX2-J3-7 to TB11-9