Overheat / Low Temperature Detected Fault

What does OHF mean?

The soft starter has detected an internal temperature that is outside its safe operating range (either too high or too low). Overheating can damage the soft starter components, while extremely low temperatures might affect performance.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Ensure all mounting recommendations from the manual are observed to guarantee adequate ventilation and cooling.

2. 4

   If overheated, wait for the Altistart 22 to cool down naturally before restarting, ideally keeping the starter powered on to allow the fan (if present) to assist cooling.