Danfoss VLT series - Default Chapter; Table of Contents

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INTRODUCTION .............................................................................................................................. intro-1

PURPOSE ........................................................................................................................................... intro-1

VLT PRODUCT OVERVIEW ................................................................................................................ intro-1

FOR YOUR SAFETY .......................................................................................................................... intro-1

ELECTROSTATIC DISCHARGE (ESD) .............................................................................................. intro-1

TOOLS REQUIRED ............................................................................................................................ intro-3

Additional Tools Recommended for Testing ................................................................................ intro-3

SECTION 1 OPERATOR INTERFACE AND DRIVE CONTROL ............................................................. 1-1

INTRODUCTION .................................................................................................................................... 1-1

Normal Display ............................................................................................................................. 1-1

Status Display ............................................................................................................................... 1-2

Factory Default Display Settings ..................................................................................................... 1-2

WARNINGS AND ALARMS ...................................................................................................................... 1-6

Alarms ........................................................................................................................................... 1-6

Warnings ....................................................................................................................................... 1-6

SERVICE FUNCTIONS ........................................................................................................................... 1-6

FAULT MESSAGE TABLE ....................................................................................................................... 1-7

DRIVE INPUTS AND OUTPUTS ............................................................................................................. 1-8

Input Signals ................................................................................................................................. 1-8

Output Signals ............................................................................................................................... 1-8

Control Terminals .......................................................................................................................... 1-9

Control Terminal Functions ............................................................................................................ 1-9

Grounding Shielded Cables .......................................................................................................... 1-11

SECTION 2 INTERNAL DRIVE OPERATION ......................................................................................... 2-1

GENERAL ............................................................................................................................................... 2-1

DESCRIPTION OF OPERATION ............................................................................................................. 2-1

Logic Section ................................................................................................................................. 2-1

Logic To Power Interface ............................................................................................................... 2-2

Power Section ............................................................................................................................... 2-3

SEQUENCE OF OPERATION ................................................................................................................. 2-4

Rectifier Section ............................................................................................................................. 2-4

Intermediate Section ...................................................................................................................... 2-6

Inverter Section ............................................................................................................................. 2-8

Brake Option ................................................................................................................................2-10

Cooling Fans ............................................................................................................................... 2-11

Load Sharing ............................................................................................................................... 2-11

Specific Card Connections ............................................................................................................ 2-11

SECTION 3 TROUBLESHOOTING ........................................................................................................ 3-1

TROUBLESHOOTING TIPS .................................................................................................................... 3-1

Exterior Fault Troubleshooting ....................................................................................................... 3-1

Fault Symptom Troubleshooting ..................................................................................................... 3-1

Visual Inspection ............................................................................................................................ 3-2

3.0 FAULT SYMPTOMS ......................................................................................................................... 3-3

3.1 DISPLAY........................................................................................................................................... 3-3

3.1.1 No Display .......................................................................................................................... 3-3

3.1.2 Intermittent Display ............................................................................................................... 3-3

3.1.3 Display (Line 2) Flashing ..................................................................................................... 3-3

3.1.4 WRONG or WRONG LCP Displayed ................................................................................... 3-3

3.2 MOTOR ............................................................................................................................................ 3-4

3.2.1 Motor will not run ................................................................................................................. 3-4

3.2.2 Incorrect Motor Operation .................................................................................................... 3-5

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