Cause : Heatsink temperature low comes when the adjustable frequency drive is too cold to operate. This warning is based on the temperature sensor in the IGBT module.

• Increase the ambient temperature of the unit.
• Also, a trickle amount of current can be supplied to the adjustable frequency drive whenever the motor is stopped by setting 2-00 DC Hold/Preheat Current at 5% and 1-80 Function at Stop.