ST300 Series | E94, what does this message mean, and what can be done?
If the error message E94 appears on the frequency converter display, it indicates that the threshold for the input voltage at analog input AI3 (panel potentiometer) has been undershot.
Causes:
The panel potentiometer is turned too far to the left or is defective.
P05.53=1, but no external control panel is connected.
Solutions:
Check whether the threshold voltage value in parameter P08.61 is set too high.
Check parameter P05.53.
If none of these issues apply, please contact technical support.