Cause : Inverter overload comes when the frequency converter is about to cut out because of an overload (too high current for too long). The counter for electronic, thermal inverter protection gives a warning at 98% and trips at 100%, while giving an alarm.

• The frequency converter cannot be reset until the counter is below 90%.
• The fault is that the frequency converter is overloaded by more than 100% for too long.
• Compare the output current shown on the LCP with the frequency converter rated current.
• Compare the output current shown on the LCP with measured motor current.
• Display the Thermal Drive Load on the LCP and monitor the value.
• When running above the frequency converter continuous current rating, the counter should increase.
• When running below the frequency converter continuous current rating, the counter should decrease.