Overheat key components (oH2)

The drive has detected the key components are overheat.

The oH2 fault occurs when the temperature sensor of key components detects the temperature is higher than the protectin level for 100 ms.

The drive auto-detects when the temperature sensor of key components detects the temperature is lower than oH2 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 cooling fan.