Cause : Frequency warning high comes when the output frequency is higher than the value in parameter 211. A "Frequency Warning High" in a Variable Frequency Drive (VFD) typically indicates that the output frequency of the drive has exceeded a specified threshold. This warning can occur due to various reasons and should be addressed promptly to ensure the proper operation of the VFD and associated equipment.
Here are some common causes and troubleshooting steps:
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Load Variations: Check if there are sudden or unexpected changes in the load being driven by the motor. A decrease in load demand can cause the output frequency of the VFD to increase. Ensure that the VFD is appropriately sized for the load requirements.
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Motor Parameters: Review the motor parameters and VFD settings to ensure they are configured correctly for the application. Verify that the VFD is programmed to provide the required output frequency for the motor to operate efficiently under normal conditions.
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Mechanical Issues: Inspect the driven equipment for any mechanical issues that could cause a decrease in load demand or a sudden increase in speed. Issues such as jams, blockages, or mechanical failures can cause the output frequency of the VFD to rise unexpectedly.
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Voltage Stability: Ensure that the input voltage supplied to the VFD is stable and within the specified range. Voltage fluctuations can affect the output frequency of the VFD and trigger warnings. Consider using voltage regulation equipment or voltage stabilizers if voltage fluctuations are a recurring issue.
