Drive Overheating
Schneider Electric · Altivar 312 Variable Frequency Drive
What does OHF mean?
This fault indicates that the internal temperature of the drive has exceeded its safe operating threshold. Common causes include inadequate cooling due to blocked ventilation, a faulty cooling fan, high ambient temperatures, or sustained operation at current levels close to the drive's maximum rating. Persistent overheating can lead to premature failure of internal components.
Additional Steps
Steps 1–2 are listed in Priority Fix.
- 3
Clean any accumulated dust or foreign material from the drive's heatsinks and ventilation openings.
- 4
Ensure adequate clearance for airflow around the drive, especially if it is installed within an enclosure.
- 5
Consider reducing the motor load or operating frequency if the drive is consistently running at high temperatures.