Frequency converter overtemperature

What does 14 mean?

The drive's heatsink temperature has exceeded its maximum safe operating limit (e.g., 90 °C or 77 °C for specific models). This is commonly caused by inadequate cooling airflow, accumulation of dust on heatsinks, high ambient temperatures, or an excessive switching frequency relative to the motor load. Sustained overtemperature will severely degrade and damage the drive's power components.

• Insufficient cooling airflow through the drive's heatsink due to blocked air vents, clogged filter mats, or a failed cooling fan.
• Ambient temperature inside the electrical enclosure exceeding the drive's maximum specified operating temperature (e.g., 40°C or 50°C).
• Excessive dust, dirt, or debris accumulation on the heatsink fins, reducing thermal transfer efficiency.
• Drive consistently operating at or above its rated output current (IH) for extended periods without adequate cooling.
• Malfunctioning temperature sensor (thermistor) providing an incorrect high temperature reading.

Click steps to track your progress.

1. 1

   Clean the drive's heatsink fins and cooling fan assembly thoroughly, removing any dust, dirt, or obstructions using compressed air (non-conductive).

2. 2

   Verify the operation of the internal cooling fan (and external enclosure fans) by observing rotation and measuring airflow.

3. 3

   Measure the ambient temperature inside the electrical enclosure using a calibrated thermometer, ensuring it is within the drive's specified operating limits.

4. 4

   Check the drive's load factor (e.g., A5-04 for output current/rated current) and ensure it is not consistently running above 100% of its continuous rating.

5. 5

   Monitor the heatsink temperature reading in the drive's diagnostic display (e.g., A5-01) after performing cleaning and cooling checks.

6. 6

   Replace clogged or damaged air filter mats in the enclosure.