Inverter overload

What does ALARM 9 mean?

The frequency converter has been operating with more than 100% overload for too long, triggering a warning at 98% and an alarm at 100%. The unit will trip, and cannot be reset until the internal thermal counter falls below 90%. Prolonged overload can severely damage the inverter's power components.

Complete Troubleshooting Guide

1. 1

   Compare the output current displayed on the LCP with the frequency converter's rated current.

2. 2

   Compare the output current on the LCP with the measured motor current using a clamp meter.

3. 3

   Monitor the thermal frequency converter load value on the LCP; ensure it decreases when running below the continuous current rating.