Danfoss VLT 3508-3532

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 3508-3532 Specifications

General

Brand	Danfoss
Model	VLT 3508-3532
Category	Transducer
Language	English

Summary

Introduction

ESD Safety Precautions

Section One

Section Two

General Troubleshooting Tips

Troubleshooting Flowchart

A visual guide to diagnose symptoms like unstable operation or no motor run.

Section Three

Static Test Procedures

Outlines tests for diodes, rectifier, and inverter sections using a voltmeter.

Testing the Input Rectifier

Testing the Soft-Charge Circuit

Testing the Inverter Section

Details static tests to rule out failures in IGBT power devices.

Dynamic Test Procedures

Covers dynamic tests for phase voltage imbalance and current feedback.

Testing Gate Drive Firing Circuits

Section Four

Component Replacement Procedures

Provides instructions for removing and replacing various unit components.

Removing & Replacing Key Cards and Modules

Details procedures for replacing ILD, DC, Rectifier, and IGBT components.

IGBT Module Replacement Details

Instructions for replacing Six-Pack and standard IGBT modules.

Interface and Relay Card Replacement

Rectifier and IGBT Module Installation

Section Five

Critical Parameters

Trip Conditions and Faults

Section Six

Spare Parts Listing

Lists part numbers for various VLT series and components.

Appendix

Component Location

Block Diagram

Schematic illustrating the functional relationships between unit modules.