Error message

1801F Supply voltage on the SPI expansion module too low

Cause of error

Supply voltage of the output driver is too low:
- Voltage drop due to overload or short circuit
- Supply voltage through CC/UEC/MC too low

Error correction

- Check the supply voltage.
- Check the wiring of the outputs.
- Avoid overloads by deactivating one or more output channels.
- Inform your service agency.