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VFD limp mode after power failure

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shugo
Posts: 1
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(@shugo)
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Joined: 2 months ago

Hi all

 

Please help. After an power outage the ACS580 recognizes the DC undervoltage error, after power was restored it  then goes into limp mode, running inconsistently below 80% of the set frequency value. I've seen on the logs a lot of DC undervoltage errors happening in a small amount of time, like 10 errors in 2 minutes. This is most probably the cause for the limp mode.

 

Attached is a image of the current readings during this event. Rated motor current is 56A but running consistently below that.

 

Any suggestion of how I can implement a type of a automatic reset that can prevent this from happening?

 

S

1 Reply
click2electro
Posts: 5079
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(@click2electro)
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Joined: 2 years ago

First check drive input rectifire diode using multimeter. 

If input is ok then check DC voltage in parameter in group 01 actual parameter. Please share the reading of both.

And for confirmation you want want if any fault comes then drive automatically reset  ?

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