Danfoss VLT 3502-3532

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 3502-3532 Specifications

General

Brand	Danfoss
Model	VLT 3502-3532
Category	Transducer
Language	English

Summary

INTRODUCTION

ESD SAFETY PRECAUTIONS

Guidelines for preventing damage to electronic components from electrostatic discharge.

SAFETY WARNINGS AND REQUIRED TOOLS

OPERATIONAL SAFETY GUIDELINES

Crucial safety warnings and operational precautions for users.

LIST OF REQUIRED TOOLS

Essential tools for troubleshooting and servicing the VLT unit.

SECTION ONE: DESCRIPTION OF OPERATION

LOGIC SECTION OVERVIEW

Details the control card, microprocessor, and user interface functions.

SECTION ONE: POWER SECTION AND SEQUENCE

POWER SECTION COMPONENTS

Describes rectifier, DC bus capacitors, and IGBT components.

SEQUENCE OF OPERATION

Explains the step-by-step operational flow of the VLT drive.

SECTION TWO: FAULT INDICATORS AND MESSAGES

STATUS AND WARNING MESSAGES

Covers status, warning, and fault messages displayed by the control card.

SECTION TWO: ALARM MESSAGES AND TROUBLESHOOTING

ALARM MESSAGES

Details alarm messages that interrupt operation and require resets.

GENERAL TROUBLESHOOTING TIPS

SECTION TWO: SYMPTOMCAUSE CHARTS

SYMPTOMCAUSE DIAGNOSTIC GUIDE

SECTION THREE: STATIC TEST PROCEDURES

TESTING INPUT RECTIFIER AND SOFT-CHARGE CIRCUIT

SECTION THREE: INVERTER AND HEATSINK TESTS

TESTING THE INVERTER SECTION

SECTION THREE: DYNAMIC TEST PROCEDURES

TESTING OUTPUT PHASE VOLTAGE IMBALANCE

TESTING CURRENT FEEDBACK

SECTION THREE: GATE DRIVE FIRING CIRCUITS

TESTING GATE DRIVE FIRING CIRCUITS

SECTION FOUR: COMPONENT REPLACEMENT PROCEDURES

REMOVING & REPLACING THE CONTROL CARD

SECTION FOUR: REPLACING KEY MODULES

REPLACING ILD, DC, AND RECTIFIER MODULES

REPLACING SIX-PACK IGBT MODULE

SECTION FIVE: APPLICATIONS AND PARAMETERS

CURRENT LIMITS AND MOTOR OPERATION PARAMETERS

SECTION FIVE: TRIP CONDITIONS AND CAUSES

GROUND FAULT AND OVERCURRENT TRIP ANALYSIS

SECTION FIVE: OVERCURRENT AND OVERVOLTAGE TRIPS

OVERVOLTAGE TRIPS DUE TO REGENERATION

SECTION FIVE: FAULT MEMORY

FAULT CODE INTERPRETATION

SECTION SIX: SPARE PARTS

SPARE PARTS LIST FOR VLT 30003500 SERIES

APPENDIX: COMPONENT LOCATION

COMPONENT IDENTIFICATION DIAGRAM

APPENDIX: BLOCK DIAGRAMS

VLT BLOCK DIAGRAMS