ST600 | Err.75, what does this message mean and what can be done?

If the error message Err.75 appears on the display of the frequency inverter, it indicates an undervoltage at analog input AI2.

Causes:

• The input voltage at AI2 is too low.
• Nothing is connected to AI2.

Solutions:

• Check the wiring of AI2.
• Connect AI2 directly to the +10V source for verification.
• Check parameter P08.60.

If none of these error sources apply, please contact technical support.

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