F0233 fault in WEG CFW500 Drive indicates No Supply on the CAN Interface. This means the CAN network collapsed due to a missing external power supply at the connector.
Cause:
- Power supply cables are misconnected or inverted.
- Contact problems on the cable or connector of the CAN interface.
Remedy:
Measure if there is voltage within the allowed range between pins 1 and 5 of the CAN interface connector. Check terminal strip alignment and cable contact.
