OHF meaning in ATS48, starter thermal fault.
Altistart 48 Soft Starters
ATS48 getting an OHF fault. Fault does not appear in the Installation Guide bulletin #30072-450-61
OHF indicates a starter thermal fault.
Check the mechanism (wear, mechanical play, lubrication, blockages, etc.).
Check the sizing of the starter in relation to the motor and the mechanical requirement.
Check the operation of the fan, ensuring that the air passage is not obstructed in any way and the heatsink is clean.
Ensure that the mounting recommendations are observed.
Check ambient temp around the starter. Wait for the ATS48 to cool before restarting.
OHF was omitted from the Installation Guide bulletin #30072-450-61 but will be included in the next release of the manual.