Undervoltage

What does E.UVT mean?

This protective function activates, particularly with PM motors, when the converter voltage drops due to power supply issues like power failure or voltage sags. This causes the motor to coast, and if an automatic restart function is enabled, it may lead to repeated restarting and coasting cycles. Insufficient input voltage can prevent the inverter from maintaining stable operation and delivering rated power, potentially leading to inconsistent process control.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   If automatic restart after instantaneous power failure is active, verify its settings (e.g., restart time, voltage thresholds) are appropriate for the application.