Chapter 4 Fault Diagnosis and Solution SI30 Solar Pump Inverter Manual This chapter describes the inverter fault, alerts, and operation of the failure on the inverter, the display information on inverter and countermeasures. In addition, the poor condition of the drive and motor failures will be briefly described in this chapter. Tuning guide on commissioning of the drive please refer this chapter.
4.1 Fault Information and Description in Detail 16 Keypad Fault Fault type Possibility reason Troubleshooting display code E.LU2 Under voltage at runs ●Power voltage too low ●Check input power ● Promote the power supply system ● Seek support from factory ● Power grid capacity is too low or with big current impact ●DC main contactor don’t close E.oU1 Over voltage at acceleration ●Power voltage fluctuation over limit ●Too start rotating motor ● Check power grid ● Restart until motor is stop completely, or set [F1.00] set for 1 or 2 E.oU2 Over voltage during deceleration ●Deceleration time too small ●The driving load too heavy ●Power voltage fluctuation over limit ●Prolong deceleration time ●Reduce the load, or select bigger capacitor drive, or connect braking unit ● Check input power E.oU3 Overvoltage at ●Voltage fluctuate ●Check input voltage constant speed above limit ●Install input reactor E.oU4 Over voltage at stop ●Voltage fluctuate above limit ● Check the input voltage ● Seek support from factory E.oC1 Over current during acceleration ●Acceleration time is ●Prolong acceleration time ●Restart motor when it on still, or set f1.00 for 1 or 2.
● Reset V/f curve or torque boost setting too short ●To start rotating motor ●V/F setting not correct or torque boost setting too big ●Solar drive capacitor is too small E.oC2 Over current ●The deceleration time ● Increase the during is too short. deceleration time.