3G3MV variable speed drive: Errors and alarms, possible cause and solution
How to configure a speed variator? How does an altivar work? How does a motor speed controller work? Part of errors and alarms: Display of error "OC" Overcurrent: Possible cause and solution: Check if there is a short circuit or an earth fault at the output. The load is too heavy. Reduce it or use a larger dimmer. Check the motor's FLA rating against the drive and the V/F parameter. Display of error "OV" Overvoltage: Possible cause and solution: The inertia of the load is too high and the motor is regenerating. Increase the deceleration time (n020 or n22). Connect an external braking resistor and assign the value 1 to n092. Check the brake resistor and wiring. Display of error "UV1" Main circuit undervoltage: Possible cause and solution: Check the main supply voltage and connections. Verify that the power supply is correct for the drive being used. Monitor circuit DIPs or interrupts. Display of “OH” error. Unit overheating: See manual for installation instructions and recommendations. Check the fan (if attached). Check the V/F characteristics or decrease the carrier frequency. Display of error "OL1" Motor overload: Possible cause and solution: Check and reduce the load. Check the V/f characteristics (Vmax and Fmax). Increase the motor operating speed. Increase acceleration/deceleration times. Error display "EF" External error: Possible cause and solution: Check the wiring of your control terminal. A multifunction digital input has been set to 3 or 4. The operating signal must be removed before you can reset. Error display "SER" (Flashing) Sequence error: Check the sequence and ensure that the LOCAL/REMOTE selection or the communication/control circuit selection command is not activated during operation. Error display "bb" (Flashing) External blocked output stage: Check the wiring of your control terminal. A multi-function digital input has been set to 12 or 13, Error display "EF" (Flashing) Error of sequence. A forward and reverse operation signal was requested at the same time. Check the sequence and make sure that the FORWARD and REVERSE commands are not activated at the same time.