Cause : Heatsink overheat comes when ambient temperature is too high. The motor may be subjected to a load that exceeds its rated capacity.

Er.650 fault in inovance IS650 servo drive indicates Heatsink overheat . This means the heatsink temperature has exceeded the permissible limit.

1. Measure ambient temperature.
2. Observe whether the fan rotates during running.
3. Check whether installation of servo drive is proper.