ST600s | Err.04, what does this message mean, what can be done?

If the error message Err.04 appears on the display of the frequency inverter, it is overcurrent during acceleration.

Causes:

• The acceleration is too high.
• The mains voltage is too low.
• The power of the inverter is too low.
• Temporary load or error occurred.
• Ground fault or phase loss occurred at the output.
• Strong external sources of interference; The overvoltage tilt protection is not activated.

Solutions:

• Increase acceleration time P00.11 or braking time P00.12.
• Check the input power.
• Choose the VFD with greater power.
• Check if the load is short-circuited (ground fault or short-circuit between the wires) or if the motor does not rotate smoothly.
• Check the output wiring; check if there are strong disturbances.
• Check the setting of the corresponding function codes.

If none of these error sources apply, please contact technical support.

Tags: