OUT1 Fault is an IGBT Ph-U fault. Possible causes include too rapid acceleration, damage to the IGBT module, or poor connection of the drive cable. A grounding short circuit may have occurred as well. To resolve this issue, increase the acceleration time, replace the damaged power unit, check the drive cables, and investigate any strong interference from external equipment.

OUT2 Fault is an IGBT Ph-V fault. This error is often caused by incorrect triggering due to interference. As a solution, check the drive cables and verify if external equipment is causing strong interference.

OUT3 Fault is an IGBT Ph-W fault. The likely causes include poor drive cable connection or a grounding short circuit. To fix this issue, review the connections and inspect for interference from external equipment.

OC1 Fault indicates overcurrent during acceleration. Possible reasons include too rapid acceleration, low mains voltage, or insufficient inverter power. There could also be sudden changes in the load or issues such as a ground short circuit or output phase loss. To resolve this, increase the acceleration time, check the input power, and if necessary, select a higher-powered inverter. Inspect the load for short circuits or proper rotation, and check the output connections for any interference caused by external factors.

OC2 Fault refers to overcurrent during deceleration. Causes may include low mains voltage, insufficient inverter power, sudden load transitions, or abnormalities. There may also be a ground short circuit or phase loss in the load. To resolve, check the input power, inspect for short circuits, ensure the load is functioning correctly, and review the output connections for external interference.

OC3 Fault signals overcurrent during constant speed operation. Possible causes include strong external interference or the absence of overvoltage protection. The solution involves checking the output connections, monitoring for external interference, and verifying that the appropriate function codes are correctly set.

OV1 Fault occurs when overvoltage happens during acceleration. The cause might be an input voltage abnormality, a too-short deceleration time, or the inverter may have started while the motor was already spinning. The absence of dynamic braking components could also be a factor. Solutions include checking the input power, ensuring the deceleration time is adequate, installing braking components, and verifying the function code settings.

OV2 Fault indicates overvoltage during deceleration. Possible causes include large energy feedback or the absence of braking components. To resolve this, install braking components and check that the function codes are set correctly.

OL1 Fault points to motor overload. Possible causes include low power supply voltage, incorrect motor rated current settings, motor stalling, or sudden load changes. To fix this, check the mains voltage, reset the motor's rated current setting, inspect the load, and adjust the torque accordingly.

OL2 Fault indicates inverter overload. Causes could include too rapid acceleration, restarting the motor while it's still rotating, low mains voltage, an excessively heavy load, or the inverter's rated power being too small for the actual requirement. To resolve, increase the acceleration time, avoid restarting the motor after stopping, check the mains voltage, select a higher-powered inverter, and use a suitable motor.

OL3 Fault suggests electrical overload. The inverter will trigger an overload pre-alarm based on the set value. In this case, review the load and the overload pre-alarm point.

OV3 Fault refers to overvoltage during constant speed operation. In this case, braking energy may not have been activated. The solution is to install braking components and check that the relevant function codes are set correctly.

UV Fault indicates low voltage on the DC bus. The power supply voltage may be too low. As a solution, check the input power of the supply line.