ST300 Series | E41, what does this message mean, and what can be done?
If the error message E41 appears on the frequency converter display, it indicates a fault in the safe circuit of channel H1.
Causes:
Incorrect wiring of the STO.
Fault occurred at the external STO switch.
Hardware fault in the safety circuit of channel H1.
Solutions:
Check whether the terminal wiring of STO channel H1 is correct and properly tightened.
Check whether the external STO safety switch is functioning correctly.
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.