Fault code: OL1 "OL1" is an overload error. The reason is as follows: ① the motor rated current is set incorrectly. ② motor protection operation time is set too short, the need to extend the operating time of the motor. ③ inverter deceleration time is set too short, the need to extend the deceleration time. ④ Inverter V / F curve maximum frequency setting too low voltage energy saving Huaibei old company, check the motor nameplate specifications, the maximum voltage of the inverter frequency is set to the rated motor frequency. ⑤ When an inverter with multiple motors offer energy-saving pump Chuzhou, the inverter motor overload have both feature set as invalid. ⑥ load is too large, the need to reduce the load or increase the motor capacity. Prevent over-voltage inputs. Power input terminal of the inverter is often over-voltage protection, energy-saving power plant but Bengbu Which is good, if the input of the high voltage is applied for a long time, the input of the inverter will be damaged. Therefore, in practice, to verify the inverter input voltage, single-phase or three-phase inverter and the rated voltage. Regulators have a device especially when the supply voltage is very unstable, otherwise it will have serious consequences. Huaibei old energy-saving company, Huainan energy transformation, Yueyang Ohm Electric offers from Yueyang Ohm Electric Co. Yueyang City Ohm Electric Co. (www.yyomdq.com/) strong, credible, Yueyang in Hunan inverter, dividers and other industries has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Yueyang Ohm Electric and you work into the brilliant, for a better future!