GE Fuji AF-300 Mini™ Error OU3: (Overvoltage during running at constant speed)

GE Fuji AF-300 Mini Drive · taken from the manufacturer’s manual, pages cited

Alarm codeOU3

Overvoltage detected while running at constant speed, causing the drive to stop if intermediate DC circuit voltage exceeds 400 Vdc (for 230 V series) or 800 Vdc (for 460 V series). The manual's first action is: “The drive stops the motor by detecting an overvoltage (400 Vdc for 230 V series, 800 Vdc for 460 V series) in the intermediate dc circuit.”

Model
GE Fuji AF-300 Mini™
Display shows
(Overvoltage during running at constant speed) (OU3)
Type
Alarm code
Source
Manual p. 79

What OU3 means

(Overvoltage during running at constant speed) p. 116

Common causes

  • During running at constant speed (Stopped) p. 116

What to do

  1. The drive stops the motor by detecting an overvoltage (400 Vdc for 230 V series, 800 Vdc for 460 V series) in the intermediate dc circuit. p. 116

Before you service the product, read the safety instructions in the manual p. 4.

If OU3 is still not resolved

  • Contact a qualified electrician for wiring p. 5
    “Wiring must only be performed only by a qualified electrician.”
  • Check that power is off before wiring p. 24
    “Check that the power is turned off before proceeding with any wiring Failure to do so may result in electric shock.”
Open the manual at page 79 All AF-300 Mini™ error codes Manual details & download

This page summarises what the manufacturer’s manual says about OU3; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with GE Fuji. Found a mistake? Report an error.