ABB ACH550 Error 34: MOTOR PHASE

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

Fault code34

MOTOR PHASE error signals a motor phase loss in the motor circuit. The manual's first action is: “Check for and correct: • Motor fault. • Motor cable fault. • Thermal relay fault (if used). • Internal fault.”

Model
ABB ACH550
Display shows
MOTOR PHASE (34)
Type
Fault code
Source
Manual p. 26

What 34 means

MOTOR PHASE p. 26

Common causes

  • Fault in the motor circuit. One of the motor phases is lost. p. 26

What to do

  1. Check for and correct: • Motor fault. • Motor cable fault. • Thermal relay fault (if used). • Internal fault. p. 26

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

If 34 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 26 All ACH550 error codes Manual details & download

This page summarises what the manufacturer’s manual says about 34; 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.