ABB ACH550 Error 4020: OVRD2 BYP

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

Alarm code4020

OVRD2 BYP alarm occurs when override mode 2 is active and the bypass is controlling the motor. The manual's first action is: “Check Parameter 0103 and 0104 for digital input status”

Model
ABB ACH550
Display shows
OVRD2 BYP (4020)
Type
Alarm code
Source
Manual p. 74

What 4020 means

OVRD2 BYP p. 74

Common causes

  • Alarm is generated when override 2 is active and the bypass is controlling the motor p. 74

What to do

  1. Check Parameter 0103 and 0104 for digital input status p. 74

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

If 4020 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 74 All ACH550 error codes Manual details & download

This page summarises what the manufacturer’s manual says about 4020; 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.