SI30 Solar Pump Inverter Manual 17 deceleration ● The load or inertia of ● Install external load is too large braking resistor or unit ●Solar drive capacitor is ● Select an AC drive of too small matching power class. E.oC3 Over current at constant speed ●Load sudden change ●The voltage of power grid is too low.
● Check the load change ● Check the input voltage E.oL1 Motor overload ● V/F curve is improper ●Adjust V/F curve or or boost torque is too big boost torque ●The grid voltage is too ● Check grid voltage lower ●Improper setting of ●Motor overload [F5.06/18] parameters protection coefficient is ● Check load condition improper or select matching ●Load is too big or inverter motor block load ●Use variable ●General motor runs at frequency motor if low speed for a long long-term low speed time running is needed. E.oL2 AC drive overload ●V/F curve is improper or boost torque is too big ●ACC.
time is too short ●Restart motor which in counter rotate ●Load is too big ●Select an AC drive of matching power class. ● increase the ACC./DEC. time ●Restart motor after complete stop and set [F1.00] to 1 or 2 ●Adjust V/F curve or boost torque E. SC System abnormal ●Deceleration is too ● Prolong acceleration time ● To check peripheral equipment ● Ask to support ● Check the wiring layout, cable ground short ●Short circuit of solar drive output or phase output short circuit to ground ● Module damage ● EMC interface E.oH1 Inverter over-heat ●Temperature is too ● Make the high. environment meet the ● Air channel is blocked. requirement. ● Fan connection parts ● Clear the air channel. is loose.
● Check and reconnect ● Fan is damaged. the wire