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FF91 warning in ABB ACS800 drive

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(@click2electro)
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Joined: 4 years ago

Cause : TEMPERATURE MEASUREMENT ALARM comes when motor temperature measurement is out of acceptable range.

The code FF91 in your ABB ACS800 drive indicates a fault related to the motor temperature. This signifies that the measured motor temperature has exceeded the set fault limit within the drive.

  • Check connections of motor temperature measurement circuit.
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(@al-abbar-tempering)
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Joined: 2 months ago

alarm ff 91 showing what we need to check

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(@click2electro)
Joined: 4 years ago

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Posts: 18330

@al-abbar-tempering pls confirm are you using any temperature sensor or thermistor?

Also check motor data in parameter group 99.

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