Cause : Overheat 1 (Heatsink Overheat) comes when the heatsink temperature exceeded the drive overheat level. The temperature of the heatsink has exceeded 10 °C plus the default value of L8-02.

1. Check the temperature surrounding the drive.
2. Improve the air circulation within the enclosure panel.
3. Install a fan or air conditioner to cool the surrounding area.
4. Remove anything near the drive that might be producing excessive heat.