ST300 Series | E43, what does this message mean, and what can be done?
If the error message E43 appears on the frequency converter display, it indicates a fault in the safe channels H1 and H2.
Causes:
A hardware fault has occurred in the STO circuit.
Solutions:
If the error occurs repeatedly, replace the control board.
Note:
To reset this error message, the device must be restarted.
If none of these causes apply, please contact technical support.