ER. The meaning of the OUE fault code is: overvoltage during standby. The possible reasons are: 1. DC bus voltage detection circuit failure; 2. The input voltage is abnormal or the power is lost during operation. It can detect whether the power supply voltage used by the inverter is normal, and in addition, it is necessary to check whether the power supply line of the inverter is normal and whether the wiring is OK.
1. Overvoltage
Overvoltage is a fault that will be encountered in the use of the inverter, and the inverter will give the fault code when the fault occurs. The so-called overvoltage of the inverter refers to the inverter voltage that exceeds the rated voltage due to various reasons, which is manifested in the DC voltage of the DC bus of the inverter, which is divided into accelerated overvoltage, deceleration overvoltage and constant speed overvoltage.
2. Reasons
The causes of inverter overvoltage faults are:
1. The input voltage is too high: as long as the parameters are set correctly, the general power supply voltage will not trip the inverter due to overvoltage. The overvoltage on the input side of the power supply mainly refers to the impulse overvoltage on the power supply side, such as the overvoltage caused by lightning and the overvoltage caused by the compensation capacitor when it is closed or disconnected. These situations can be solved by means of parallel surge absorbers or series reactors on the input side.
2. The regeneration overvoltage caused by the operation of the motor dragged by external force: I think so, in the process of motor operation, the actual speed of the motor is higher than the command speed of the inverter, and the motor is in the state of regenerative power generation. In this case, a braking unit (built-in in some inverters, which can be checked and explained) and a braking resistor can be installed.
3. Inverter hardware problems: The internal detection components of the inverter can only be sent for professional repair.
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