Danfoss VLT 3011-3052

0 - 1
Introduction
Safety Precautions 0 - 2
Required Tools 0 - 3
Section One
Description of Operation 1 - 1
Sequence of Operation 1 - 4
Section Two
Fault Indicators and Messages 2 - 1
Troubleshooting Tips 2 - 5
Troubleshooting Flowchart 2 - 6
Symptom/Cause Chart 2 - 9
Section Three
Static Test Procedures 3 - 1
Dynamic Test Procedures 3 - 6
Section Four
Component Replacement Procedures 4 - 1
Section Five
Current Limit Trips 5 - 1
Ground Fault Trips 5 - 3
Overcurrent Trips 5 - 3
Overvoltage Trips 5 - 4
Fault Memory 5 - 6
Section Six
Spare Parts Tables 6 - 1
Appendix
Component Locations 7 - 1, 7 - 5
Block Diagrams 7 - 2, 7 - 6
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Table of Contents

Danfoss VLT 3011-3052 Specifications

General

Brand	Danfoss
Model	VLT 3011-3052
Category	Transducer
Language	English

Summary

Introduction

ESD SAFETY

Safety Precautions

Crucial safety guidelines for handling the equipment and preventing hazards.

Section One

Logic Section

Power Section

Section Two

Fault Indicators and Messages

Information on status, warning, and alarm messages displayed by the control card.

Warning Messages

Describes warning messages for conditions like low/high voltage and overload.

Alarm Messages

Details alarm messages indicating unit interruption due to fault conditions.

General Troubleshooting Tips

Key tips for performing repairs and preventing further damage to components.

Troubleshooting Flowchart

Diagnostic flowchart to identify and resolve motor operation issues.

SymptomCause Charts

Charts correlating symptoms with possible causes for experienced technicians.

Status Messages

Section Three

Static Test Procedures

Methodology for testing components using a VOM or ohmmeter.

Testing the Soft-Charge Circuit

Testing the Inverter Section

Procedure for static testing of IGBT power devices in the inverter section.

Testing for Current Feedback

Procedure to test current sensor signals for proper function and equality.

Testing Gate Drive Firing Circuits

Testing the Input Rectifier

Procedure for static testing of the input rectifier module diodes.

Dynamic Test Procedures

Procedures for dynamic testing, focusing on voltage and current.

Testing for Output Phase Voltage Imbalance

Method to test phase-to-phase output voltage and current for balance.

Section Four

Component Replacement Procedures

Removing & Replacing the ILD Card, DC Card, Rectifier Card and IGBT

Removing & Replacing the Interface Card, Relay Card, Rectifier, and IGBT

Removing & Replacing the Control Card

Section Five

Ground Fault Trips

Overvoltage Trips Due to Regenerative Applications

Fault Memory

Current Limit Trips

Overcurrent Trips