Cause: Inverter internal overheat comes when the temperature inside the inverter has exceeded the allowable limit. This might be due to a faulty internal stirring fan, issues with the power board, or a problem with the temperature sensor.

0h3 fault in fuji FRENIC MEGA drive indicates Inverter internal overheat. This means the internal components of the inverter (such as power semiconductors or internal heat sink) have exceeded their safe temperature limits.

• Ensure the drive is operating within its specified ambient temperature.
• Check if the drive’s cooling fans are running properly.
• Clean dust and debris from fans and heat sinks.
• Verify motor load doesn’t exceed drive rating.