IGBT overheating (oH1)

IGBT temperature exceeds the protection level.

Action condition - When Pr.06-15 is higher than the IGBT overheating protection level, oH1 error occurs instead of oH1 warning.

Reset only when IGBT temperature is lower than oH1 error level minus (-) 10°C.

Check if the ambient temperature or temperature inside the control cabinet is too high, or if there is obstruction in the ventilation hole of the control cabinet -

1. Check ambient temperature.
2. Regularly inspect the ventilation hole of the control cabinet.
3. Change the installed place if there are heating objects, such as braking
resistors, in the surroundings.
4. Install/ add cooling fan or air conditioner to lower the temperature inside the
cabinet.

Check if the drive matches the corresponding load - 1. Reduce the load
2. Reduce the carrier
3. Replace the drive with a larger capacity model

Check cooling fan.