Cause : Power card temperature comes when the temperature of a component within the power card has exceeded safe operating limits, triggering a fault condition. The temperature sensor on the power card is either too hot or too cold.

1. Check the operation of the door fans.
2. Check that the filters for the door fans are not blocked.
3. Check that the gland plate is properly installed on IP21/IP54 (NEMA 1/12) frequency converters.