Heat Sink overtemperature
Danfoss · VLT HVAC Drive High Power
What does 29 mean?
The heat sink temperature has exceeded its maximum allowable limit, indicating an internal overheating condition within the frequency converter. This poses a significant risk of damage to the drive's power components if not addressed. The exact trip and reset temperatures are specific to the drive's power size, and the fault will automatically reset once the temperature drops below a predefined safe level.
Additional Steps
Steps 1–2 are listed in Priority Fix.
- 3
Verify that the ambient temperature around the frequency converter is within the manufacturer's specified operating range.
- 4
Confirm that all internal and external cooling fans are functioning correctly, spinning freely, and delivering adequate airflow.
- 5
Review the application's load profile and drive sizing to ensure the frequency converter is not consistently operating under excessive thermal stress.