Danfoss VLT series Service Manual

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
Table of Contents
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Danfoss VLT series Specifications

General

Series	VLT
Category	DC Drives
Output Voltage	0-100% of input voltage
Protection Features	Overvoltage, Undervoltage, Overcurrent, Overtemperature, Short Circuit, Ground Fault
Communication Interfaces	Profibus, CANopen
Enclosure Rating	IP20, IP21, IP55, IP66
Cooling Method	Forced Air Cooling, Convection Cooling
Control Mode	Sensorless Vector, Closed Loop Vector
Ambient Temperature	-10°C to +50°C (14°F to 122°F)