Drive overheat

What does OHF mean?

This fault signifies that the drive's internal temperature has exceeded its safe operating limits, indicating insufficient cooling, a blocked heatsink, or an excessive load condition. Continuous operation in an overheated state will lead to accelerated wear and potential failure of drive components (e.g., capacitors, power semiconductors). Prolonged overheating can result in complete drive breakdown.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Ensure adequate ventilation space around the drive according to installation guidelines. Confirm air intake and exhaust are clear.

2. 4

   Reduce the motor load or consider a higher-capacity drive if the current unit is consistently operating at its thermal limits.