6.4 Fault Detection 128 SIEP C710606 33A OYMC AC Drive – J1000 User Manual Cause Possible Solution The contactor on the inrush prevention circuit is damaged. • Cycle power to the drive. Check if the fault reoccurs. • Replace the drive if the fault continues to occur. • Check monitor U4-06 for the performance life of the inrush prevention circuit. • Replace the drive if U4-06 exceeds 90%.