Frequency converters are key to stable motor operation, but alarm signals often appear during use. Many users feel helpless when facing these alerts. This article explains common alarms, diagnosis methods and prevention tips to help you solve problems quickly.
Overcurrent Alarm: This alarm usually occurs when the current exceeds the converter’s rated range. Possible causes include sudden motor overload, short circuits in the output circuit, or mismatched converter and motor specifications. It is a frequent issue in heavy-load operation scenarios.
Overvoltage Alarm: Overvoltage mainly relates to the DC bus voltage being too high. It may be triggered by sudden braking of the motor (generating regenerative energy) or unstable input power supply. This alarm is common when equipment stops abruptly.
Overheating Alarm: Overheating is often caused by poor heat dissipation. Blocked cooling fans, clogged heat sinks, or operating the converter in high-temperature environments can all lead to this alert. Long-term overheating will damage internal components.
Every converter has a display panel showing specific alarm codes. These codes correspond to predefined faults—refer to the user manual to confirm the fault type directly. This is the fastest way to locate problems.
After confirming the code, check external connections. For overcurrent, examine if the motor or output line has a short circuit. For overvoltage, verify the input power and braking circuit. Ensure the load matches the converter’s capacity.
Open the converter cover (after power-off) to inspect internal parts. Look for burnt components or loose terminals. For overheating alarms, clean the fan and heat sink to restore normal heat dissipation.
Dust accumulation affects heat dissipation and insulation. Clean the converter’s interior and cooling system monthly, especially in dusty industrial environments. Replace aging fans in time.
Install the converter in a dry, well-ventilated area with a temperature between -10°C and 40°C. Avoid direct sunlight or proximity to heat sources. Use voltage stabilizers if the power supply is unstable.
Choose a converter with appropriate capacity based on the motor’s power and load type. Avoid long-term overload operation, as this accelerates component wear and triggers frequent alarms.
When a Frequency converter alarms, don’t panic. Start with the alarm code, then check external circuits and internal components step by step. Regular maintenance and proper use can significantly reduce fault risks.
If you need a reliable Frequency converter that minimizes fault occurrences, or want more professional guidance on equipment maintenance, you can visit our product page to learn about our quality offerings tailored for stable operation.
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