Low Temperature (Adv. Code 0)

What does 21 mean?

This fault is triggered when the heatsink temperature drops below -10.0 degrees Celsius. Operating the drive outside its specified low-temperature limits can affect the performance and reliability of internal components, particularly electrolytic capacitors and LCD displays. This prevents safe operation and could cause damage.

• Drive operating in an unheated environment with ambient temperature falling below the specified minimum operating temperature (e.g., -10°C).
• Heatsink temperature sensor (thermistor) fault, causing it to report an artificially low temperature.
• Ventilation system drawing in extremely cold air directly onto the drive's heatsink.
• Drive enclosure not adequately insulated for cold environments or experiencing localized cold spots.

Click steps to track your progress.

1. 1

   1. Measure the ambient temperature inside the control panel enclosure and directly around the drive's heatsink using a calibrated thermometer.

2. 2

   2. Ensure the operating environment temperature is consistently within the drive's specified range (typically 0°C to 50°C for industrial drives).

3. 3

   3. If the ambient temperature is genuinely low, consider installing a panel heater with a thermostat to maintain the minimum operating temperature inside the enclosure.

4. 4

   4. Power down. Visually inspect the heatsink thermistor and its connections for damage or looseness.

5. 5

   5. If the ambient temperature is above -10°C and the fault persists, the heatsink thermistor or its measurement circuit may be faulty.