Troubleshooting Delta VFD M-series manual: Unable to Set Motor Rated Current due to Minimum Value Requirement

Question:

I am currently facing an issue with my Delta VFD M-series manual. In order to input the motor rated current, I need to set parameter P.52 to match the motor's specifications. However, my motor's rated current is 0.60A, which is below the minimum allowed value of 2.1Amps specified by the VFD. As a result, I am unable to enter the correct motor current. Can you pinpoint the source of this problem?

Top Replies

User adam_lhadi mentioned an issue with setting the motor rated current on a Delta VFD M-series. The manual states that parameter P52 should be set to the motor rated current, but with a motor rated current of 0.60A, which is below the minimum allowed value of 2.1Amps, there is a problem. The manual specifies that Parameter 52 has a limit of 30% to 120% of the Full Load Amps (FLA) rating of the drive. If you have a 7A drive, this could be the reason for the issue.

According to robertmee, the manual specifies that Parameter 52 has a restriction between 30% and 120% of the Full Load Amp (FLA) rating of the drive, which is likely 7A. However, I have observed videos of the same drive model as mine allowing users to input any value without encountering any issues. Can someone clarify what FLA stands for?

Full Load Amps: Do you know the model number of your drive?

Robertmee inquired about the full load amps and requested the model number of your drive. The model number provided was VFD015M21A.

adam_lhadi pointed out that the drive, labeled vfd015m21a, is actually a 7A drive. This means that a 30% limit would restrict you to 2.1A. It's crucial to realize that the video you watched may have been for a drive of a different size. Understanding these limits is key when selecting and purchasing equipment.

It seems like your motor might not be a good match with this particular VFD due to your motor's low rated current. The Delta VFD M-series is designed for motors with a higher current threshold. Try looking into a smaller drive or a micro VFD, as they often have a lower minimum current input. Additionally, consult with the motor and VFD manufacturers or an experienced electrical professional to ensure the compatibility of your setup for optimum performance and safety.

From what you've described, it appears there might be a mismatch between the capabilities of your VFD and your motor's specifications. The M-series VFD models are typically designed to handle higher current ratings. Your motor's rated current of 0.60A is quite low and, unfortunately, the VFD can't be set to match it. It might be worth considering a different VFD model that can accommodate lower current ratings, or perhaps exploring using a current limiting resistor if the operational conditions allow it. Remember that any adjustments should be completed by a professional to avoid damage to your equipment.

It seems like your motor isn't quite compatible with this series of VFD as they are designed for higher current applications. Instead of attempting to force a mismatched setup, consider finding a VFD that's tailored to cater to smaller motors. Compromising on this might lead to inefficient operation or potentially damage the VFD or motor. Alternatively, consulting with a Delta representative might provide an otherwise unthought-of solution.

It sounds like you're running into a common issue with VFDs when the motor rating is below the minimum threshold set by the drive. If your motor's rated current is indeed below the VFD's minimum specification, one potential solution is to look into whether the VFD can be configured for smaller motors, or if there are any firmware updates or settings that allow for adjustment to accommodate lower ratings. Alternatively, you might check if there's a compatible VFD that is specifically designed for your motor's specifications, as using a VFD that's not intended for lower current applications can lead to operational problems.

It sounds like you're encountering a common limitation with the VFD's parameter settings. Since your motor's rated current is below the VFD's minimum threshold, one possible solution is to check if there’s an option to change the VFD's "current type" setting (if available) or see if there's a way to override or adjust the minimum current value in the firmware. Another approach could be to reconsider the VFD selection based on your motor specifications, as sometimes using a drive specifically designed for lower current applications can help. If all else fails, reaching out to Delta’s support can provide specific guidance tailored to the M-series.

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Frequently Asked Questions (FAQ)

FAQ: FAQs:

Answer: 1. Why am I unable to set the motor rated current in my Delta VFD M-series manual? - The minimum allowed value for motor rated current in the VFD is specified as 2.1Amps, which is higher than your motor's rated current of 0.60A.

FAQ: 2. How can I resolve the issue of setting the motor rated current below the minimum value in the Delta VFD M-series manual?

Answer: - You may need to consider using an alternative method or workaround provided by Delta to address this discrepancy between the motor's rated current and the VFD's minimum requirement.

FAQ: 3. What should I do if my motor's rated current does not meet the minimum requirement set by the Delta VFD M-series manual?

Answer: - Contact Delta's technical support or refer to the VFD manual for guidance on how to proceed in such situations where the motor's rated current falls below the specified minimum value.

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