Electronic Thermal Relay Function Pre-Alarm

What does Electronic thermal relay function pre-alarm mean?

The cumulative thermal value of the electronic thermal O/L relay has reached 85% or higher of the Pr. 9 (Electronic thermal O/L relay) setting. This indicates that the motor or inverter is approaching its thermal overload limit. Continuing operation without intervention will almost certainly lead to an electronic thermal overload trip, shutting down the inverter.

Complete Troubleshooting Guide

1. 1

   Reduce the load on the motor and decrease the frequency of operation to allow cooling.

2. 2

   Set an appropriate value in Pr. 9 (Electronic thermal O/L relay) that accurately reflects the motor's thermal characteristics.