ABB ACH550 Error 3011: INP PHASE B LOSS

AC drive · taken from the manufacturer’s manual, pages cited

Fault code3011

INP PHASE B LOSS indicates phase B input is lost due to loose connector, wiring issue, or blown fuse. The manual's first action is: “Check J7 connector Check black wire on input block Check incoming voltage, phase to ground”

Model
ABB ACH550
Display shows
INP PHASE B LOSS (3011)
Type
Fault code
Source
Manual p. 68

What 3011 means

INP PHASE B LOSS p. 68

Common causes

  • Loose J7 connector Loose wiring on Contactor assembly. Blown upstream fuse p. 68

What to do

  1. Check J7 connector Check black wire on input block Check incoming voltage, phase to ground p. 68

Before you service the product, read the safety instructions in the manual p. 2.

If 3011 is still not resolved

  • contact the factory or your local Authorized Service Center for repair or replacement. p. 2
    “Never attempt to repair a malfunctioning ACH550; contact the factory or your local Authorized Service Center for repair or replacement.”
Open the manual at page 68 All ACH550 error codes Manual details & download

This page summarises what the manufacturer’s manual says about 3011; 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 ABB. Found a mistake? Report an error.