UnderVoltage

What does F004 mean?

The DC bus voltage within the drive has dropped below its minimum acceptable threshold. This usually occurs due to an insufficient incoming AC line voltage, sags, or momentary power interruptions. Prolonged undervoltage can cause erratic drive behavior or component stress.

Complete Troubleshooting Guide

1. 1

   Continuously monitor the incoming AC line voltage for stability, ensuring it remains within the drive's specified operating range.

2. 2

   Inspect all input power wiring and connections for loose terminals or poor contact that could lead to voltage drops.

3. 3

   Check the main power supply and upstream breakers or fuses for proper operation and capacity.