Cause : DEVICE OVERTEMPERATURE comes when the drive's internal temperature has exceeded its safe operating limit. This can be caused by several factors such as poor ventilation, high ambient temperature, excessive load, or malfunctioning cooling components.

The F0003 alarm code on your ABB ACS355 drive indicates a device over temperature fault. This means the internal temperature of the drive has exceeded its safe operating limits.

1. Check ambient conditions.
2. Check air flow and free space above and below the drive.
3. Check fan operation.
4. Check overloading of the drive.