VLT FC 103 Refrigeration Drive
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Feb 23, 2024 11:50 am
Cause : Heat Sink temp comes when the maximum temperature of the heat sink has been exceeded. The temperature fault does not reset until the temperature drops below a defined heat sink temperature.
The trip and reset points are different based on the frequency converter power size.
- Check for the following conditions
- Ambient temperature too high
- Motor cable too long
- Incorrect airflow clearance above and below the frequency converter
- Blocked airflow around the frequency converter
- Damaged heat sink fan
- Dirty heat sink : This alarm is based on the temperature measured by the heat sink sensor mounted inside the IGBT modules.
- Check fan resistance.
- Check soft charge fuses.
- Check IGBT thermal sensor.